PROC FREQ TWOWAY = GROUPHORIZONTAL option

[Kabuto]

I practiced an example from the textbook "The SAS Little Book", the program is:

ODS GRAPHICS ON;
PROC FREQ DATA = bus; 
	TABLES BusType*OnTimeOrLate / PLOTS=FREQPLOT(TWOWAY = GROUPHORIZONTAL); 
RUN; 
ODS GRAPHICS OFF;

The plot shows the frequencies of the BusType variable by the OnTimeOrLate variable:

 

Nonetheless, the textbook shows a frequency plot of the OnTimeOrLate variable by the BusType variable, even though the plot title is still "Distribution of BusType by OnTimeOrLate". Here is a screenshot from the textbook:

I just have no idea why I cannot get the same plot as what the textbook shows. I do not think there is anything wrong with the program. Hopefully anyone can help me figure out. 

[FreelanceReinh · Accepted solution]

Hello @Kabuto,

Your code and plot are correct, whereas the graph from the textbook doesn't match its title: A graph "by OnTimeOrLate" must consist of separate parts for different values (or format categories) of OnTimeOrLate, which is obviously not the case there.

Many textbooks contain errors, even some SAS Press titles.

You can reverse the grouping of the plot by switching the variable names in the TABLES statement or by adding the GROUPBY=ROW option in the parentheses after "FREQPLOT."