Hi,

Back again with another matrix problem, this time on interpolation and bilinear interpolation.

Below is the matrix and relevant values to use (d.t and d.dd) to find the values in sigma.ct matrix



There is a condition that any value in d.dd that is below vy=20 shall use the value in the first row, and not be interpolated below. e.g. d.t = 500 & d.dd = 2.6637 sigma.ct shall be 58.

I have used the linterp2 function to find the values which meet this criteria, which works on its own, but I cant get it to work in a if condition. I have used the interpBilinear function to get the values when d.dd is above vy=20 and this works within the if loop as it gives only the last two rows of the above requirements.

When combined in the for loop the below happens, the linterp2 still gives all the rows, rather than only giving the first 7 (in this case), but gives the correct number of columns.

Is there any way of correcting this? As a thought do I need to put the condition check d.dd<20 within the linterp2 function. if so where would I put it?



Bilinear Interpolation2.sm (24 KiB) downloaded 28 time(s).

Thanks in advance
Ian

Wrote

Back again with another matrix problem, this time on interpolation and bilinear interpolation.

Sorry, I don't understand the problem.

Bilinear Interpolation2.sm (24 KiB) downloaded 25 time(s).

Wrote

Wrote

Back again with another matrix problem, this time on interpolation and bilinear interpolation.

Sorry, I don't understand the problem.

Bilinear Interpolation2.sm (24 KiB) downloaded 25 time(s).

Hi,

the result should look like:

Wrote

the result should look like:

... finish the construction.

Since your linterp2() function creates arrays,
an index is needed at q inside for_loop calculation.

Regards

Once again so close, thanks for the pointer

Below is corrected:
Bilinear Interpolation2 v1.sm (22 KiB) downloaded 21 time(s).

Thanks
Ian

You can recast the bilinear in preparation to CreateMesh

Bilinear Interpolation2 v1.sm (43 KiB) downloaded 28 time(s).

Nice, thank you Jean

Wrote

You can recast the bilinear in preparation to CreateMesh

... it didn't attach ???

Bilinear Interpolation2 v1 Next.sm (71 KiB) downloaded 34 time(s).