Solved
choose intervals
I have z values and I want to specify an interval from the z values. I want to say that the values of layer 1 are the vales between 0.7d<z <4d when d = 0.4m .

I have z values and I want to specify an interval from the z values. I want to say that the values of layer 1 are the vales between 0.7d<z <4d when d = 0.4m .

We could also use "match" with the "range" modifier as shown here:
https://community.ptc.com/t5/Mathcad/find-value-from-matrix/m-p/934126/highlight/true#M210569
Guess this here is the third thread dealing with the very same question 😞
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