Irregular grid contour plots

[rocketian]

I have a set of data from thermocouples on an irregular grid and want to produce contour plot - any ideas how to convert the irregular grid to regular ???

The data changes with time - but I can handle that with an animation

 

[GregLocock]

You need to interpolate your current data onto a regular grid. That is not a foolproof process since you'll have to decide how to do the interpolation.



Cheers

Greg Locock


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[rocketian]

Yes - I had thought of that. It is the 2d interpolation that is tricky...

 

[GregLocock]

You could interpolate each column, and then each row, as 2d interpolations using a spline fit. that'll give you 2 Z values for each x and y, so take the average.

Crude, but it will work for smoothly varying data.

Otherwise Matlab et al offer a variety of solutions, as does the excellent xlxtrfun for Excel.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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