Log transformation

[laurenhosking]

How would i go about performing a log y (log transformation) on a single variable in my data set. This is so I’m able to perform a linear regression

[PeterClemmensen]

Use the Log Function.

[laurenhosking]

I tried this but my data still doesn’t follow a normal dist. Any idea why?

[PeterClemmensen]

Your data does not have to be normally distributed to run a linear regression.

This is a good article on the topic: On the assumptions (and misconceptions) of linear regression .

[FreelanceReinh]

Hi @PeterClemmensen,

I think your link points to "Need to log-transform a distribution? There's a SAS function for that!" (which is also an interesting article), but of course you mean "On the assumptions (and misconceptions) of linear regression."

[PeterClemmensen]

Oh, yes of course. Corrected, thank you!

[ksumbundu]

*Log Transfrom single variable;

data work.prac;
set project1.hiv;
LogA = log(A);
LogB = log(B);
run;

Try this. (using log function)