Using DIF and LAG functions

Using DIF and LAG functions

DIF function creates a new variable (D) by taking the difference of observations of another variable (X).Syntax, DIF<n>(argument); *<-- n specifies number of LAGS

data two;

input X @@;

Z=lag(x);

D=dif(x);

datalines;

1 2 6 4 7;

proc print data=two;

run;

Results of the PROC PRINT step follow:

X Z D

1 . .

2 1 1

6 2 4

4 6 – 2