Hi All,

i have a dataset that i want to dynamically inspect for the number of
variables that start with "Exposure_"  and then for these count the entries
across each case i.e

ID Exposure_1 Exposure_2 Exposure_3
1        y                 y                y
2        y                 y                -
3        y                 -                 -

So the corresponding new variables that would be created are

ID Max_Exposure Unique_Exposure
1           3                       3
2           3                       2
3           3                       1

I know this may seem fairly basic but it will give me the starting point to
develop more advanced things with loop and nat lang

Thanks in advance

Mike

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