topic Why do my simple linear regression codes fail? in New SAS User

Why do my simple linear regression codes fail?

Chiaoyi — Mon, 13 Sep 2021 19:20:27 GMT

My codes are:

DATA Ch2_14; 

INPUT ratio $ viscosity; 

CARDS; 

1.0 0.45 

0.9 0.20 

0.8 0.34 

0.7 0.58 

0.6 0.70 

0.5 0.57 

0.4 0.55 

0.3 0.44 

; 

RUN; 

proc Reg data = CH2_14;
	model  ratio = viscosity;
 run;

ERROR: Variable ratio in list does not match type prescribed for this list.

How to fix my code?

Re: Why do my simple linear regression codes fail?

PaigeMiller — Mon, 13 Sep 2021 19:26:01 GMT

Ratio is a character variable, as seen by the $ when you INPUT ratio. You can't perform a linear regression on character variables.

Remove the $ and try your code again.

Re: Why do my simple linear regression codes fail?

data_null__ — Mon, 13 Sep 2021 19:26:26 GMT

Get rid of the $sign in the INPUT statement.

Re: Why do my simple linear regression codes fail?

Reeza — Mon, 13 Sep 2021 19:28:10 GMT

You're reading in Ratio with a $ which means SAS will read that in as a character variable. SAS will not use character variables in regression because that doesn't make sense. Remove the $ to read it in as a numeric and you should be fine.