Re-scaling Data to New Grid

[maurice]

I have 2 sets of 2-D data on different grids. One is NxM, the other PxQ, but the 2 data sets correspond to the same physical area XxY. Does anybody have a program they might share that would allow me to put multiple data sets onto a common grid?

[TomGutman]

Doing that involves interpolation. Assuming your data is dense enough, and smooth enough, you can use a cubic spline interpolation to calculate approximations for any grid you like. The standard Mathcad cspline will do for a square array of values, the routines in my cubic spline sheet will work with any regular (rectangular) grid.
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� � � � Tom Gutman

[ptc-1368288]

On 12/3/2009 6:49:13 PM, maurice wrote:
>I have 2 sets of 2-D data on
>different grids. One is NxM,
>the other PxQ, but the 2 data
>sets correspond to the same
>physical area XxY. Does
>anybody have a program they
>might share that would allow
>me to put multiple data sets
>onto a common grid?
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Before attempting to fit/interpolate or otherwise destroy the original data sets, you should scale in some manageable common range. The proposed Chebyshev is offered as a simple but very common model.

jmG