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