Question

How to add new observation to already created dataset in SAS ? For example, if I have dataset ‘dataX’ with variable ‘x’ and ‘y’ and I want to add new observation which is multiplication by two of the
of the observation number n, how can I do it ?

dataX :
x y
1 1
1 21
2 3

I want to create :

dataX :
x y
1 1
1 21
2 3
10 210

where observation number four is multiplication by ten of observation number two.

Answer 1

Here is one way to do this:

data dataX;
   input x y;
   datalines;
1 1
1 21
2 3
run;

/* Create a new observation into temp data set */
data _addRec;
  set dataX(firstobs=2); /* Get observation 2 */
   x = x * 10;  /* Multiply each by 10 */
   y = y * 10;
   output;      /* Output new observation */
   stop;
run;

/* Add new obs to original data set */
proc append base=dataX data=_addRec;
run;

/* Delete the temp data set (to be safe) */
proc delete data=_addRec;
run;