Error ~= Invalid types for comparison

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Luca
Luca on 17 Apr 2021
Commented: Luca on 17 Apr 2021
Hi,
I tried to run this code:
D2sub1.RETsm(D2sub1.ID ~= lagmatrix(D2sub1.ID, 1)) = NaN;
and get the error
Error using ~= (line 30)
Invalid types for comparison.
ID is a categorical column.
Is it not possible to compare categorical variables like this?
Thanks,
  4 Comments
Jan
Jan on 17 Apr 2021
You mention, that ID is a categrical variable, but what is "lagmatrix"? Please post a small example of your inputs.
Luca
Luca on 17 Apr 2021
So it looks like this
ID lagmatrix(ID,1)
10000 NaN
10000 1
10000 1
.
.
.
10000 1
10001 1
10001 2
The lagmatrix command moves the original Matrix down by 1 row. So the switch happens one row later.
There where it is not equal I want that the retrurns are NaN.
I realised that it creates you a variable of type double.
I guess this is the problem.
Thank you very much for your help.

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