Define a dummy variable (if else)

[Travis Chang]

Hi everyone:


I want to define a dummy variable, rosneg, which is equal to one if ros<0 and equal to zero if ros ≥ 0. Use CEOSAL1.RAW to estimate the model

What should I do to get the correct command?


thanks

[Rich Goldstein]

I have no idea what your second sentence means; for your first sentence, your request, try the following:

gen byte rosneg=ros<0
replace rosneg=. if ros==.

you may or may not need, or want, the second command

in the future, please use -dataex- (and please read the FAQ)

[Leonardo Guizzetti]

Use CEOSAL1.RAW

This sounds like the reference to a SAS dataset which doesn't affect the advice you are after here. However, if that really is important, you should tell us why with more words.