Hi. All~ I want to interpolate data from irregular grid to irregular grid.

i.e.> I have input data (x1,y1,z1) and I want to get the output (x2,y2,z2). here, (x1,y1,z1) and (x2,y2) are given.

Please, Help me! and Thank you in advance

The best interpolation method for this is the "Natural Neighbours" technique.

http://wwwrses.anu.edu.au/geodynamics/nn/nn.html

You can also use least squares (There are many variations of this technique)

Thank you for your help. and Can I get the source code? Is it free or pay for it?

You can ask the authors of the site I suggested for source code. They also have a paper discribing the technique. You could get this paper and then implement the interpolation technique yourself.

Good luck,

Jeff

Thank you,Mr.Franklin ! I will ask and I'll do my best. Thank you for your useful advice!