interp1 problem with Matlab2012
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Hi,
I have problem with this function but only with the v2012.
"Error using griddedInterpolant The coordinates of the input points must be finite values; Inf and NaN are not permitted."
Somebody know about this problem according to a Matlab version? The same package of function run well under other version!
This is part of my function:
volx = interp1([stor(i, 1); inf], [v; 0], x, 'linear', 1);
Thanks a lot
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Answers (3)
Jan
on 16 Apr 2015
The error message seems to be fair: How can the X-value of a signal equal Inf? It is meaningless to set the corresponding Y-value to zero. What do you expect as output value apart from the point stor(i)?
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Star Strider
on 16 Apr 2015
There is not enough information to be certain (and I don’t have access to R2012 on this machine), but it looks as though you want to extrapolate. The problem is that you are only dealing with a single scalar value in ‘stor’ (and possibly also ‘v’), so that will be a problem. Be sure ‘stor’ and ‘v’ are vectors of the same size, or your interpolation/extrapolation will fail.
Assuming that ‘x’ includes the value you want to extrapolate (that it is one element longer than ‘stor’ and ‘v’), use the 'extrap' option:
volx = interp1(stor(:, 1), v, x, 'linear', 'extrap');
See if that works.
1 Comment
Star Strider
on 17 Apr 2015
@Vittoria — I do not understand the problem you want to solve. Please post some representative data, a detailed description of the problem, and what you want to do.
Vittoria D'Avino
on 17 Apr 2015
1 Comment
John D'Errico
on 17 Apr 2015
Please don't add answers for every comment that you make. There is a button to add a comment to any answer, or to your own question.
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