minimum function

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@YA_10963798 wrote:

Yes . I want it to be choose always the minimum value between the three values

So first it compares it to the previous value and choose the minimum and than to 12 MPa and choose the minimum. And then to the after value and choose the minimum. … this when the value is between (0 and 12)

If the value between (12 and 15) it will remain the same

If the value bigger than 15 it will choose 15.

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First, let's look at your limiting program and see where it's going wrong.

If you look at the second value (index O+1), you want the minimum of qmin and the values at O and O+2, which are 12 MPa, 11.4 MPa and 15.8 MPa, respectively.  The minimum of these is 11.4 MPa, which is what we see in result.  

Rather than max(qmin,qclong_i-1,qclong_i+1) what you want is max(qmin,min(qmax,qclong_i-1,qclong_i+1)).  IOW, you get the minimum of qmax and a values two neighbours and then the maximum of that and qmin.  The min returns a value with a maximum value of qmax.  The outer max returns the min value or qmin.

And then there are the end values.  I've used q to limit them because q has the same values as qclong, and it's less typing and horizontal space (thus making it slightly more legible).

Stuart