Boxplot (Multiple variables)

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Boxplot (Multiple variables)

Hello, I am trying to create a boxplot image with several variables side-by-side. These are not categories of the same variable but, rather, separate continuous variables in which I would like a side-by-side comparison of the boxplots. These variables all share the same range (% out of 100) and I wish to use a single boxplot image to display several boxplots side-by-side.

So far,  I have generated separate boxplot images using the vbox statement in the sgplot procedure to make individual boxplot images, but I havn't found anything to combine them into a single image.

Let me know if my description is not clear Smiley Happy

Thanks!


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‎09-23-2014 11:08 AM
SAS Super FREQ
Posts: 3,630

Re: Boxplot (Multiple variables)

See the article Order variables by values of a statistic - The DO Loop, which also sorts the variables according to some statistic.

If you don't care about sorting the box plots, you can skip the first few steps. Just add an ID variable, call PROC TRANSPOSE, , call PROC SGPLOT and use the VBOX statement with the CATEGORY= option.

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Trusted Advisor
Posts: 1,228

Re: Boxplot (Multiple variables)

Combine all the continuous variables in one variable and flag them. Then use flag as a categorical variable on x-axis to display boxplots of continuous variables side-by-side.

New Contributor
Posts: 3

Re: Boxplot (Multiple variables)

Could you please provide an example?

How would you combine several categorical variables into one?

Example.

          X1     X2     X3

obs1    1        5       3

obs2    2        4        5

combine

          Y1

obs1  1, 5, 3

obs2   2, 4, 5

please provide example of how to flag as well. Thanks!

Trusted Advisor
Posts: 1,228

Re: Boxplot (Multiple variables)

Please see an example below.

data class(keep=all_vars flag);

set sashelp.class;

array v{*} _numeric_;

do i=1 to dim(v);

all_vars=v{i};

flag=vname(v{i});

output;

end;

run;

proc sort data=class;

by flag;

run;

proc boxplot data = class;

    plot all_vars * flag;

quit;

SAS Super FREQ
Posts: 3,630

Re: Boxplot (Multiple variables)

The blog post does contain an example.

Solution
‎09-23-2014 11:08 AM
SAS Super FREQ
Posts: 3,630

Re: Boxplot (Multiple variables)

See the article Order variables by values of a statistic - The DO Loop, which also sorts the variables according to some statistic.

If you don't care about sorting the box plots, you can skip the first few steps. Just add an ID variable, call PROC TRANSPOSE, , call PROC SGPLOT and use the VBOX statement with the CATEGORY= option.

New Contributor
Posts: 3

Re: Boxplot (Multiple variables)

Thanks Rick! I am still getting accustomed to the SAS language so it took me a while to figure out the code. The graph looks great!

Super User
Posts: 11,130

Re: Boxplot (Multiple variables)

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