Graph Maker With Error Bars
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How To Calculate Error Bars
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Dot Plot Maker
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Chart Design Your charts Data Enter your data Labels Choose your data Display https://plot.ly/plot Create your chart Direction and background color Vertical Horizontal Background Color Border Color Chart type Normal 3D Tool tip and legends Tool Tip Color Tool Tip Font https://www.meta-chart.com/bar Size Formatted Tool Tip Legend Position Data Set Number of items -- Choose -- Series Details Scale Section Details Section {{ sliceParameterSection }} Required Invalid Number Optional Error Values Invalid Number Invalid Number Graph description Graph Title Source Y-Axis Label y-axis units x-axis units Title & Subtitle Fonts Font Family Font Color Font Size Font Preview abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890 Axis Labels Font Family Font Color Font Size Label Rotation Bar Data Labels Font Family Font Color Font Size Enable
bars? Say that you were looking at writing scores broken down by race and ses. You might want to graph the http://www.ats.ucla.edu/stat/stata/faq/barcap.htm mean and confidence interval for each group using a bar chart with error bars as illustrated below. This FAQ shows how you can make a graph like this, building it up step by step. First, lets get the data file we will be using. use http://www.ats.ucla.edu/stat/stata/notes/hsb2, clear Now, let's use the collapse command to make the mean and standard deviation by race error bar and ses. collapse (mean) meanwrite= write (sd) sdwrite=write (count) n=write, by(race ses) Now, let's make the upper and lower values of the confidence interval. generate hiwrite = meanwrite + invttail(n-1,0.025)*(sdwrite / sqrt(n)) generate lowrite = meanwrite - invttail(n-1,0.025)*(sdwrite / sqrt(n)) Now we are ready to make a bar graph of the data The graph bar command makes a pretty good bar graph. graph with error bars bar meanwrite, over(race) over(ses) We can make the graph look a bit prettier by adding the asyvars option as shown below. graph bar meanwrite, over(race) over(ses) asyvars But, this graph does not have the error bars in it. Unfortunately, as nice as the graph bar command is, it does not permit error bars. However, we can make a twoway graph that has error bars as shown below. Unfortunately, this graph is not as attractive as the graph from graph bar. graph twoway (bar meanwrite race) (rcap hiwrite lowrite race), by(ses) So, we have a conundrum. The graph bar command will make a lovely bar graph, but will not support error bars. The twoway bar command makes lovely error bars, but it does not resemble the nice graph that we liked from the graph bar command. However, we can finesse the twoway bar command to make a graph that resembles the graph bar command and then combine that with error bars. Here is a step by step process.First, we will make a variable sesrace that will be a single variable that contains the ses and race i