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I need to do build a simple regression model around the productivity of various land units in SAS but I am fairly new to it. I have the following parameters:

Prodbanana / ELEVATION / SLOPE / SOILTYPE

The productivity vaules of banana are in kg/ha; The elevation and slope parameters are already classified (6 classes) as well as SOILTYPE (6 classes)

The model should be: Productivity = x1* ELEVATION + x2*SLOPE + x3*SOILTYPE

I tried so far:

proc glm data=Work.Banana2;

class ELEVATION SLOPE SOILTYPE;

model Prodbanana = ELEVATION + SLOPE + SOILTYPE;

run;

But it returns the following error:`

45 proc glm data=Work.Banana2;

46 class ELEVATION SLOPE SOILTYPE;

47 model Prodbanana = ELEVATION + SLOPE + SOILTYPE;

                             -

                             22

                               -----

                               202

NOTE: The previous statement has been deleted.

ERROR 22-322: Syntax error, expecting one of the following: a name, ;, (, *, -, /, @, CHARACTER, CHAR, NUMERIC, |.

ERROR 202-322: The option or parameter is not recognized and will be ignored.

48 run;`

Any suggestions?

cheers

Dallasbarr
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1 Answers1

0

The addition operator is unnecessary. You can find a quick guide to model specification syntax here. Works across SAS regression procedures.

user3349904
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