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souji
Obsidian | Level 7

Hi

 

In which instant I can use BY or CLASS in the Proc Means procedure

 

 in SAS prep guide, Scenario 7, they asked to:

 

Use PROC MEANS to calculate the mean and standard deviation for the variables AvgHighTemp and AvgLowTemp by the new Month variable.

 

In the code they use CLASS instead of BY

 

Q: How do I know when to use CLASS or BY, Please help me to understand

 

data work.scenario7;

set cert.temp18;

format Day date9.;

Month=month(day);

run;

proc freq data=work.scenario7;

tables HighTemp;

run;

proc means data=work.scenario7; 

class month;

var AvgLowTemp AvgHighTemp;

run;

 

 

1 REPLY 1
unison
Lapis Lazuli | Level 10

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