[Gretl-users] Loop Construction Command

Dear Gretl Experts, I worked with a sample consisting of 6 regions (1,2,……,6) with 2 areas (1 &2) and thus, a total of 12 sub-samples. But only 11 subsamples are available for estimation. I used the following loop for the estimation. For all the 12 sub-samples (if available) the following loop works well. When one sub- sample is unavailable, I used the following code and got the message “No observations would be left!”. Code: discrete Region discrete Area loop i=1..6 # Six Regions loop j=1..2 # Two areas smpl (Region==i)&&(Area==j) --restrict --replace Message: No observations would be left! smpl (Region==i)&&(Area==j) --restrict --replace loop j=1..2 In addition to the above, I want to create a combined loop in order to compute the Region-wise combined area (1+2) and for a full sample( six more sub-samples plus 1 more full sample in the same loop and thus a total of 19 subsamples). I would be thankful to you, if you could give a solution to the above issue and to compute the Region-wise combined areas (1+2) and for a full sample in addition to the loop possibly. Thanking You, Dr.K.Dhanasekaran