Hi
So i converted numeric variables into categorical variable.
By far when i check my temporary data called 'forreg' i can see 'Male' equals 1 for Gender.
But When i tried to plot PROC REG it still doesn't allow me to plot
and gives me error, saying:
150 data forreg;
151 set new;
152 KEEP Exam Assign Gender;
153 IF Gender='Male' then Gender=1; Else Gender=0;
154 run;
NOTE: Numeric values have been converted to character values at the places given by: (Line):(Column).
153:30 153:45
NOTE: There were 146 observations read from the data set WORK.NEW.
NOTE: The data set WORK.FORREG has 146 observations and 3 variables.
NOTE: DATA statement used (Total process time):
real time 0.03 seconds
cpu time 0.03 seconds
155
156 TITLE1 'Scatter';
157 PROC REG data=forreg;
158 MODEL Exam = Assign Gender /VIF;
ERROR: Variable GENDER in list does not match type prescribed for this list.
NOTE: The previous statement has been deleted.
159 RUN;
WARNING: No variables specified for an SSCP matrix. Execution terminating.
NOTE: PROCEDURE REG used (Total process time):
real time 0.08 seconds
cpu time 0.03 seconds
How can i plot PROC REG, using my converted dummy variables?
And here is my code
data forreg;
set new;
KEEP Exam Assign Gender;
IF Gender='Male' then Gender=1; Else Gender=0;
run;
TITLE1 'Scatter';
PROC REG data=forreg;
MODEL Exam = Assign Gender /VIF;
RUN;
Once a variable is character, it never changes to become numeric. As the note in your log indicated, GENDER is still character after these statements:
if gender='Male' then gender=1; else gender=0;
It would be easy enough for you to verify that result by running a PROC CONTENTS on the result.
You can create a new variable:
if gender='Male' then gender_num=1; else gender_num=0;
You can even end up with a numeric variable named GENDER:
drop gender;
rename gender_num=gender;
But the original GENDER variable remains character for the duration of its existence.
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