Interpolation of a bed profile.

Hello,

I have a series of "radials" around a pier giving the depth of a bed and I wish to plot. However, before doing so would like to interpolate the 0 values in between the radials. Any suggestions how to accomplish would be much appreciated?

if true
23  0  0  34  0  0  26  0  0  29
0  22  0  21  0  0  24  0  31  0
0  0  20  22  0  0  22  23  0  0
0  0  0  -400  -400  -400  -400  0  0  0
24  26  25  -400  -400  -400  -400  24  25  29
0  0  0  -400  -400  -400  -400  0  0  0
0  0  25  28  0  0  31  26  0  0
0  26  0  29  0  0  24  0  27  0
27  0  0  30  0  0  27  0  0  29
end

This is small piece of one set of data there are much more zero values on the original and there are 16 different sets of data. So manually calculated is not viable.

Thanks in Advance.

Andy

Answer 1

[Jan]

You can set the 0 values to NaN:

x(x==0) = NaN;

and call FEX: inpaint_nans.

Perhaps this helps also: FEX: gridfit

[Andrew Buglass]

I've had a go at using the inpaint_nans file but cannot get it to work. Any chance of a bit of guidance please.

[Jan]

A guidance is more likely, when you explain "cannot get it to work" with any details.

[Sean de Wolski]

+1 for inpaint_nans