# Save Histogram Stata

Exploratory Data Analysis with One and Two Variables Instructions for Lab #2 Statistics 111 - Probability and Statistical Inference LabObjective To explore data with histograms and scatter plots. Stata will go through id and see if any of the values are missing. In this article, you will learn to create a for loop in R programming. Create a histogram to look at. Stata provides excellent graphics facility for quickly exploring and visualizing your data. ABSTRACT Unstable liquid rocket engines can produce highly complex dynamic flowfields with features such as rapid changes in temperature andapplicability. Last modiﬁed December 10, 1999. Erstelle dazu das do-file ueb05_14a. 7 Multiple scatterplots 67. Stata can easily produce "publication quality" graphics, but it takes a few more steps to actually put them in a publication. Right-click on the Graph window, select Save Graph, and choose the appropriate Save as type. Data Analysis Using Stata. R version 3. An introduction to creating histograms using Stata. ado gives the exact same result as myhist_v2. com) Laura Hughes ([email protected] Two suppliers (A and B) provide disk drives for a computer manufacturer. 1 Stata graph commands 57 Example graph commands 57 Saving and exporting graphs 58 Learning how to use graph commands 59 2. Uslaner December, 1999 use use a data set–e. Once you've learnt SAS though, it's extremely powerful working with large datasets, especially when using its SQL procedure (there is a pac. The sum of squares of the statistical errors, divided by σ2, has a chi-squared distribution with n degrees of freedom : However, this quantity is not observable as the population mean is unknown. If you don’t needed your histogram to be shaded, you could easily combine these two data sets into a simple XY Scatter chart (chart 4): But shaded histogram bars require a little bit more work, as described in my tutorials Filled Histograms Using Excel XY-Area Charts and Histogram Using XY and/or Area Charts. use ﬁlename. In the simplest cases a non-uniform distribution can be obtained analytically from the uniform distribution of a random number generator by applying an appropriate transformation. To compute power, specify n1 or n2. This will save the results of applying the tree model to the Testing dataset into a CSV. You may save a set of commands from the command file by selecting FILE SAVE or SAVE-AS from the STATA do-file menu. Vertical reference lines cannot be added to bar plots. It is aimed to help students to start working in STATA and to provide them with basic commands needed to do the first problem set. Histograms in Stata. use ﬁlename •To save the data in Stata –. Custom table in stata. Have the data in order, so you know which values are above and below. All three tasks are easily done in Stata with the following sequence of commands: reg y2 x predict y2hat predict error2, resid hist error2, bin(50) sum y2 y2hat error2. zip` file - Launch Stata and open the `StataStatGraph. dta” to keep only data for where birth=2, save this new data as ”lo wbwt2. save filename. It was developed in 1985. com/journals/stbcontents/stb53. Right click within the Review Window to see what can be done. hist displays bins as rectangles, such that the height of each rectangle indicates the number of elements in the bin. 1) histogram bars already have an uncertainty associated with them. apply the command tabulate foreign All Stata commands h ave e same format (svn tax): log using -myDoFiIe. If we only need to show the histogram of proximity, -addplot- here is not necessary. Since 1966, researchers at the Carolina Population Center have pioneered data collection and research techniques that move population science forward by emphasizing life course approaches, longitudinal surveys, the integration of biological measurement into social surveys, and attention to context and environment. Using the findit command, Stata can search and install user-written Stata packages on your machine. In this tab you will find guides on using this dataset. Step 3: From drop down menu for File format: Choose PORTABLE NETWORK GRAPHICS (*. The dataset is the 2018 Cardiac Catheterization Diagnostic Data, and the example uses a combination of non-parametric and parametric methods with visualization to describe the population density function that may reasonably have generated the observed value of cholesterol [mg %]. * Before we begin, I want to point out a few things: * 1) Note the header at the top of this file that includes the date the file * was started and updated, name of who created the file, and the purpose * of the file. Now that we know how to get the data into STATA, we need to go over a few commands that will help us gain understanding of the data set we intend to analyze. txt, text replace ***** OVERVIEW OF MMA09P1NP. Saving a Stata data file in Excel format. : use anes92 save save a data set: save anes92–or save anes92,replace (if the data set already exists) save anes92,old (for STATA 5 format) Or Control+S clear clear existing data in memory set mem 80m allocate 80 megs of memory to STATA (default depends on. The former gives you an updated auto. save test file test. Part Two (approx 75%): Annotated Stata Log file. To look at a histogram for the variable x1, you just type hist x1. txt) or view presentation slides online. the number of rows in a dataset). Note: Be sure that your Stat Plot is on and indicates the Lists you are using. sampsi is no longer an officially supported Stata package. save filename. di "mma09p1np. A Short Guide to Stata 14 2 1 Introduction This guide introduces the basic commands of Stata. You have the option to replace an entire workbook, or to save the data as a new worksheet in an existing workbook. Data Browser Open the Data Browser or bring the Data Browser to the front of the other Stata windows. An introduction to creating histograms using Stata. the social sciences. For example, I can use tabstat to calculate descriptive statistics for a list of variables. dta data set. Learn About Rescaling and Transforming Variables in Survey Data in Stata With Data From the National Survey of Sexual Attitudes and Lifestyles (2010–12). PSM倾向匹配Stata操作详细步骤和代码，干货 6. A histogram is a graph that shows the frequency, or the number of times, something happens within a specific interval. University of New Hampshire, Durham, NH Department of Mathematics & Statistics *Also affiliated with the Dept. Introduction to Stata for regression analysis • Type a few lines and save as ^lesson1. use or File > Open from the menus. * Before we begin, I want to point out a few things: * 1) Note the header at the top of this file that includes the date the file * was started and updated, name of who created the file, and the purpose * of the file. The stem function seems to permanently reorder the data so that they are. You may ﬁnd yourself applying a series of very similar commands over and over again. 5 INTRODUCTION TO STATA What is STATA software? STATA is a powerful statistical package with smart data- management facilities. Alternatively, specify ci(lo up) to save the results in newvar lo and newvar up. I would like to have the saved files to be save in the same folder I am pulling the inputs from, instead of the folder I have the m-file saved in. To save the current dataset to disk, type. save ﬁlename. Colin Cameron and Pravin K. Consider this simple data file with a variable called mynum. Each time you launch Stata, Stata sets the same random-number seed, namely 123456789, and that means that runiform() generates the same sequence of random numbers, and that means that if you generated all your random samples right after launching Stata, you would always select the same observations, at least holding N constant. You’ll see that the Stata command for the graph you created will appear in the review window, in this case histogram science. 4 MB) What is a Histogram or Frequency Distribution Chart? The histogram chart groups numbers from a column in a data set, and displays the count (frequency) of the number in each group. png or some other file. Plotly's team maintains the fastest growing open-source visualization libraries for R, Python, and JavaScript. • Alternatively, type hist ptsa, d percent in command bar. A Short Guide to Stata 14 2 1 Introduction This guide introduces the basic commands of Stata. csv) Describe and summarize Rename Variable labels Adding value labels. Saving variable descriptions in a spreadsheet November 27, 2012 in Uncategorized Sometimes it is useful to save the list of variables along with their characteristics (name, label, whether the variable has a value label, its format etc) in a spreadsheet that you can use for your own reference or to communicate to others the characteristics of. • File -> Save will replace the dataset on the disk • File -> Save as … saves the dataset under a new name When working with a dataset, you should always keep a copy of the original dataset as a backup, so you don’t accidentally delete critical data. Mean, Variance, Number of Non-missing Observations, Minimum, Maximum, Etc. 3 Using an existing dataset 1. Saving graphs to use in other applications Graph commands open a new window and generate a Graph in the Stata graph format. load the in-built example datasets that comes with Stata] Task 3. Data Analysis Using Stata. The aim is to have a cumulative histogram for the negative and positive side combined in one plot. First of all, the path is the location where the data will be stored. More commands are described in the respective handouts. Stata has built-in commands -ptile- and -xtile- for calculating the quantile ranks of a variable. 4 MB) What is a Histogram or Frequency Distribution Chart? The histogram chart groups numbers from a column in a data set, and displays the count (frequency) of the number in each group. For instance: xtile ptile = x,nq(100) assigns to ptile the percentile rank associated with the variable x. Statistik mit Stata - 4 - 2. Comment at the end of a line clear all // This is a comment Uses the command clear all and then adds a comment at the end of the line *. 2 Histogram of skewed paired data (a). Making Frequency Distributions and Histograms by Hand Generally, statisticians (and any sane person) will use some kind of statistical program like R or minitab to make their statistical graphs. Adkins and R. Get (easily) introduced to Stata. csv ") If a file with your chosen name already exists in the specified location, R overwrites the original file without giving a warning. How can I overlay two histograms? | Stata FAQ This sounds like it should be pretty easy. Running the Procedure. Last modiﬁed December 10, 1999. ) is the same in two related groups (e. Publication quality tables in Stata: a tutorial for the tabout program IanWatson [email protected] The command -piaacreg- allows using several regression models. If you want to save a file over an existing file, you need to use the replace option, e. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Finally, the thickness of the line that outlines the bar can be influenced with lwidth (), which is used as a sup-option to the bar () option, just like bfcolor or blcolor. Select the option Organize output by groups. This article shows how to create comparative histograms in SAS. lm : is used to fit linear models. Source: Stata 'auto' dataset. Suarez Perez and Cynthia M. We demonstrate using the SF-36 MCS and PCS subscales in the HELP. Plotting a histogram of the variable of interest will give an indication of the shape of the distribution. asis speciﬁes that the graph be frozen and saved as is. 3 Using files on the internet Stata offers a nice option if you are connected to the internet. We get shown some lectures and tolded to use STATA, a stastics program. nk: Number of pixels with gray value rk n: total Number of pixels in the image The function p(rk) represents the fraction of the total number of pixels with gray value rk. 3 on the Central Limit Theorem, we presented a computer simulation to il-lustrate the CLT. Histogram A histogram is a graphical method for displaying the shape of a distribution The height of each bar corresponds to its class frequency. What started off as a “let’s make a quick cheat sheet for the basic functions” quickly evolved into a comprehensive set of 6 cheat sheets on the common data wrangling and analysis functions within Stata. return "Holding Period Return" } (253 observations read). histogram age, bin(12). Stata: Scatterplots and Histograms 23 Apr 2011 Tags: Stata and Tutorial Scatterplots and Histograms. By continuing to use this website you are agreeing to our use of cookies. Save it in pdf or graphic form. 操作界面 Review:历史窗口，记录自启 Results:结果窗口， 动stata以来执行过的命令 显示执行命令后的 输出结果 Variables:变量窗口， 记录目前stata内存中的 所有变量 Command:命令窗口，在这里输入要 执行的命令。. Repeat By - You can assign a column to repeat the chart for each of its values. A histogram can illustrate: 1) the location of the data, 2) the scale of the data, 3) skewness of the data, 4) presence of outliers, and 5) presence of multiple modes in the data. Eks: histogram bwt, frequency histogram bwt, frequency width(500) start(500) ylabel(0(5)50) xlabel(500(500)5000. stata基本操作 袁宏斌 1. If you want your own computer to generate an output log automatically, study section 1. To learn more about a specific Stata command (say you want more details about the graph command), type help graph (you could substitute any Stata command for the graph command; try it out for summarize for example). Frequency Tables The tabulate command. estout A generic program for making a table from one or more sets of estimation results. STATA: A Brief Introduction 3 If you get a message that data are already in memory when you try to use data, you must include the option clear, i. ado file on your computer). 操作界面 Review:历史窗口，记录自启 Results:结果窗口， 动stata以来执行过的命令 显示执行命令后的 输出结果 Variables:变量窗口， 记录目前stata内存中的 所有变量 Command:命令窗口，在这里输入要 执行的命令。. 3 Using an existing dataset 1. Indicator variables in variable lists The most common use of dummy variables is in modelling, for instance using regression (we will use this as a general example below). zip` file - Launch Stata and open the `StataStatGraph. 5 Saving Graphs Graphs can be saved in stata’s own graphical format with the command graph save. To open a log, click on. Change the color and pattern for the chart. The filename includes the dataset name and the model type: audit_test_rpart_score. , two groups of participants that are measured at two different "time points" or who undergo two different "conditions"). either before or after pasting it into a word processor. Stata for Unix(GUI) users should use the name() option if there is more than one graph displayed to ensure that the. The optimizer knows which columns. Quantiles in Stata and R. stata 指令(1)_数学_自然科学_专业资料。? use 与 save 是一对调用 STATA 系统数据文件和以 STATA 系统格 式 存盘的命令； infile 和 outfile 也是一对调用外部文本数据文件 和 以 文 本 文 件 格 式. The histogram command takes a variety of arguments, the most important being the variable you want, which comes next. 6 The count command counts the total number of observations (i. This can be tested with the Bartlett’s test for homogeneity of variances in Stata. For example, the command save auto, makes a copy of the data set, with name. Number of Buckets. The STATA interface has 5 windows, as shown in Figure 2 and described below: Figure 1. dta data set. For example, let’s load the auto data set that comes with Stata (1978 Automobile Data) and make two scatterplots and then two boxplots:. Stata allows us to visually inspect this by adding a * normal distribution to the histogram with the "normal" option: histogram totx, percent normal * You can get more documentation on histograms with: help histogram. Stata’s default style consists of four windows: a command window where we type the commands; a results. 0 Preferences Manage Preferences Factory Window Settings restores the de-fault view. Worked Example: In this example I am going to use the Stata example dataset uslifeexp. Please check the examples in the Stata Manual, after typing - help histogram - for that matter. Running the Procedure. Hi! Could anybody tell me how to plot multiple histogram in the same graph? I have 10 industry and would like to make histogram for the variable say wages for. A normal approximation curvecan also be added by editing the graph. Column Assignments. Custom table in stata. We can make histograms for the first through eleventh authors, with the understanding that first authors contribute the most, and eleventh authors the least. 3) ★엑셀 파일에 있는 자료를 STATA 화일 (*. (The not-so-neat) Figure 1 below is the combination of three separate graphs. Create the plot you want. 4 Kernel density plot 62 2. For 100 million observations, this took 31 minutes. To list the characteristics of all 30 year old white respondents, we use the STATA command list: list inc edu sex if age==30 & eth==1 (c) To draw a histogram, we use the STATA command histogram as follows: histogram inc We can save the graph in a PDF document by using the STATA command graph export as fol-lows: graph export "inc. Come back here when you are ready for some foundations. A live graph can be recalled to stata and its appearance altered by using a di erent scheme, whilst an as-is. How to Set up the Excel File: Place the variable names in the first row. The idea behind this exercise sheet is to familiarise with the statistical package STATA. It has been replaced by power. For example, the first variable in the example data is id. Saving a graph. You may wish to add a title to the graph. sys or (more recently). edu November 13, 2009 Serious work in Stata is done entirely in do-ﬁles, but you may notice that your do-ﬁles get very repetitive. Column Assignments. An introduction to data cleaning with R 7. How to compare the "performance" of two models using Stata? I have two models (Model 1 and Model 2), with different set and number of independent variables. research - Free download as Powerpoint Presentation (. In general, create histograms on columns that are used frequently in WHERE clauses of queries and have a highly skewed data. To make histogram for smokers, simply type. Histograms in Stata. Open the Data Editor or bring the Data Editor to the front of the other Stata windows. @RISK (pronounced “at risk”) is an add-in to Microsoft Excel that lets you analyze risk using Monte Carlo simulation. You want to put multiple graphs on one page. Since R supports multiple data sets, we need to specify a specific data set to manipulate when using data accessing/modifying commands. Using an existing Stata dataset. Stata features a primarily command line interface. An introduction to creating histograms using Stata. dta) – in a special STATA format that is easy to read for STATA. We can then see the Deviance Residuals. * setup version 11. exit, clear. the interaction between Stata and markup languages, and they suggest an approach to automatically generate and update reports, presentations, and web sites. 1 Stata graph commands 57 Example graph commands 57 Saving and exporting graphs 58 Learning how to use graph commands 59 2. Do not use these datasets for analysis. 3 EXAMPLES * To run you need. com you can design and share your own charts online and for free. 5 Saving Graphs Graphs can be saved in stata’s own graphical format with the command graph save. These include density plots (histograms and kernel density plots), dot plots, bar charts (simple, stacked, grouped), line charts, pie charts (simple, annotated, 3D), boxplots (simple, notched, violin plots, bagplots) and Scatterplots (simple, with fit lines, scatterplot matrices, high density plots, and 3D plots). +1 These principles are illustrated in some posts on our site that use histograms. In this tutorial, you will see how to store data on: First of. The command -piaacreg- allows using several regression models. dta saved •To use a dataset you have saved in stata –. In this article, you will learn to create a for loop in R programming. Stata’s native format for graphs is. You just clipped your first slide! Clipping is a handy way to collect important slides you want to go back to later. In general, create histograms on columns that are used frequently in WHERE clauses of queries and have a highly skewed data. do ***** * STATA Program by A. com is now LinkedIn Learning! To access Lynda. How to Set up the Excel File: Place the variable names in the first row. saving(filename, [replace]) saves results in a. To download a dataset: Click on a filename to download it to a local folder on your machine. Date you will see there is a default format assumed if you do not specify. La nueva versión de stata (Stata 8) trae activada esta opción automáticamente y proprociona además el acceso directo desde el menú a opciones que stata 7 no contiene como por ejemplo Data, Graphics Statistics y el User, lo cuales permiten realizar a travéz de ventanas muchas de las órdenes que se hacen. The col parameter is used to add colors to the bars. FHSS Research Support But a recording for a scatter plot will hardly afect a histogram. Stata's bootstrap command makes it easy to bootstrap just about any statistic you can calculate. The example below, taken from Stata 15's announcement of putpdf , shows the code in samplereport. Go to: file > save as > Stata (use most recent version available) Then you can just go into Stata and open it; Another option is StatTransfer, a program that converts data from/to many common formats, including SAS, SPSS, Stata, and many more; Exercise 1: Importing data¶ Save any work you've done so far. This feature is not available right now. RDD断点回归, Stata程序百科全书式的宝典 3. Alternatively. Connect to almost any database, drag and drop to create visualizations, and share with a click. A histogram can illustrate: 1) the location of the data, 2) the scale of the data, 3) skewness of the data, 4) presence of outliers, and 5) presence of multiple modes in the data. 07 • Bilde die Variablen kindwun, age und agegroup wie beschrieben. headroom float %6. The best way to avoid this problem is to avoid doing any stem-and-leaf plots (do histograms instead). +1 These principles are illustrated in some posts on our site that use histograms. However, the way each of these chart types plots data along the horizontal axis (also known as the x-axis) and the vertical axis (also known as the y-axis) is very different. is) factor as appropriate. If we only need to show the histogram of proximity, -addplot- here is not necessary. Now launch Stata. To split the data in a way that separates the output for each group: Click Data > Split File. : [ ] ^ + < = > 1/* 1 2*/ 0* 0// 0/// 0 do exit shell ado use clear preserve restore joinby merge append cross collapse contract reshape erase about ado an ano anov anova anovadef ap app appe appen append args as ass asse asser assert br break bro brow brows browse by bys byso bysor bysort cap capt captu captur capture cat cd char chdir checksum chelp cl class cli clis. Graphically, here is an equivalent histogram. gov) • Tim Essam ([email protected] Stata's bootstrap command makes it easy to bootstrap just about any statistic you can calculate. Let’s load the hsbdemo dataset and overlay histograms for males and female for the variable write. If ﬁlename is speciﬁed without an extension,. Inspect Descriptives Table. Selecting observations on the other hand usually uses logic like GENDER=”F” to select all the females. Colin Cameron. The Working Directory. Create a histogram of the question, "What grade would you give your child’s school" (variable name: Q11). • Purposes of this handout. Data Analysis using Stata Kristin Bott kbott @ reed. pdf), Text File (. STATA数据处理 实证论文的数据结构 查找命令与帮助 数据下载 数据导入和输出 数据合并 数据描述和画图 数据整理 命名与标注 表达式 生成新的变量 gen and egen 删除变量或者观测值 生成排序后变量和滞后项 时间序列 基于类别变量生成虚拟变量 因子变量 基于连续变量生成类别变量 重复值 outliers 数据. For example, the first variable in the example data is id. You can specify surface properties using one or more name-value pair arguments. 1 Stata graph commands 57 Example graph commands 57 Saving and exporting graphs 58 Learning how to use graph commands 59 2. A histogram is constructed by dividing the range of the data into equal-sized class intervals. dta is based on the NLSY97 Cohort, which is a longitudinal project that. If you have a categorical dependent variable, tabulate it with the Stata command:. How can I get a histogram with varying bin widths? How can I combine a histogram and a boxplot in Stata? A code fragment for combining a histogram and boxplot in one graph | Stata Code Fragments; Overlaying histograms in Stata; 一文看尽 Stata 绘图. histogram x. Color - Take a look at Color section for more details. Or, you can copy and paste your graph directly into word by using the right mouse button. set scheme s1mono /* Graphics scheme */. nk p(rk ) n. 0 Preferences Manage Preferences, and you’ll see your newly saved window setup. The easy way is to use the multiplot function, defined at the bottom of this page. Right-click on the Graph window, select Save Graph, and choose the appropriate Save as type. Or you can force Stata to exit without saving your data by typing --. The histogram of the variable Thick with a superimposed normal curve is shown in Output 4. In univariate distributions. Worked Example: In this example I am going to use the Stata example dataset uslifeexp. do) associate global macros with key folders where you store your raw data, your cleaned data and your output (e. A percentile (or a centile) is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations falls. Hi! Could anybody tell me how to plot multiple histogram in the same graph? I have 10 industry and would like to make histogram for the variable say wages for. Some Stata commands return matrices. 2 log using mma09p1np. It has been developed for the University at Buffalo (SUNY) Political Science Department PSC 531 Lab. There are many graph commands in Stata, and the best way to see them all is to do a command search on “graph” using the help menu. As with other summary output of models the first piece of information identifies how the model builder was called. The many customers who value our professional software capabilities help us contribute to this community. All commands in STATA are lower-case. My goal is simply to put a P value on a graph either in a text box or in the caption using *code*, not the Graph Editor. To do so, you click the hyperlink "Save residuals" in the results window. The best way to avoid this problem is to avoid doing any stem-and-leaf plots (do histograms instead). Plotting a histogram of the variable of interest will give an indication of the shape of the distribution. Let us load the auto dataset and compute the 75th percentile of price using Stata’s centile. However, it continues to work. You can use any number of HISTOGRAM statements after a PROC UNIVARIATE statement. X-Axis - Assign a column you want to show its distribution. Now customize the name of a clipboard to store your clips. This paper is a very simple introduction to STATA 8. 1 Output for a paired t test Figure 8. do and the equivalent markstat script, which. Heckman模型out了,内生转换模型掌控大局 5. Navigate to the Desktop (or wherever you saved the Excel file). The other side, if I create a bar graph, I can't show the percentage of firms on Y-axis. Two suppliers (A and B) provide disk drives for a computer manufacturer. La nueva versión de stata (Stata 8) trae activada esta opción automáticamente y proprociona además el acceso directo desde el menú a opciones que stata 7 no contiene como por ejemplo Data, Graphics Statistics y el User, lo cuales permiten realizar a travéz de ventanas muchas de las órdenes que se hacen. Take a look at Small Multiple section for more details. Preparing Excel Data for a Statistics Package These instructions apply to setting up an Excel file for SAS, SPSS, Stata, etc. graph save saves the speciﬁed graph to disk. So when I've come to Uni, we're recapping stats. com histogram — Histograms for continuous and categorical variables SyntaxMenu DescriptionOptions for use in the continuous case Options for use in the discrete caseOptions for use in the continuous and discrete cases Remarks and examplesReferences Also see Syntax histogram varname if in weight, continuous optsjdiscrete opts options. Alternatively, specify ci(lo up) to save the results in newvar lo and newvar up. Saving a graph You can save a graph by clicking on the right button on your mouse and choosing the option Save graph…. (b) The pivotal conﬁdence interval: You will need to calculate this by hand. stress histograms (SSH) have been introduced to summarize results from an experimental setup developed to investigate the shear stress imposed on the surface of a membrane under different two-phase flow conditions (gas and liquid) by varying the flow of each phase. If you want to include it in a Word document or a Powerpoint file for example you need to save it to a format like. Recode from car can be very powerful and is a good alternative to the code above. Or, you can copy and paste your graph directly into word by using the right mouse button. Welcome to the VassarStats website, which I hope you will find to be a useful and user-friendly tool for performing statistical computation. What makes this different from a regular bar graph is that each bar represents a summary of data rather than an independent value. graph save " wageage. The histogram of a digital image with gray values r0 , r1 ,, rL 1. Connect to almost any database, drag and drop to create visualizations, and share with a click. hist displays bins as rectangles, such that the height of each rectangle indicates the number of elements in the bin. Colin Cameron. Please check the examples in the Stata Manual, after typing - help histogram - for that matter. exit replacing filename with the name of your file. The other side, if I create a bar graph, I can't show the percentage of firms on Y-axis.