Problem in interpolation of data.
1 view (last 30 days)
Show older comments
Daniyal Ali
on 13 Oct 2015
Commented: Walter Roberson
on 13 Oct 2015
The following code is giving me the error that "The grid vectors do not define a grid of points that match the given values". I tried to use linear and other methods too, but nothing works. Need help.
a=unique(Eo.signals.values(:,:));
b=unique(SOC.signals.values(:,:));
b1 = interp1(a,b,19,'spline','extrap')
0 Comments
Accepted Answer
Walter Roberson
on 13 Oct 2015
What reason do you have for expecting that the number of unique values of one kind matches the number of unique values of the other kind, and that they should happen to be sorted in the same order?
are you sure you want to extrapolate at 19 exactly? That reads more like a number for the number of extrapolated values you would want.
I wonder if maybe you are looking for something closer to a cubic spline fit of the data?
2 Comments
Walter Roberson
on 13 Oct 2015
Use the three output form of unique() to produce A and ia and ic (third output). Use ic to index the second array to get the values corresponding to each A value. Then the two will be the same length and in correspondence.
More Answers (0)
See Also
Categories
Find more on Interpolation in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!