how to value nan number in a vector? and how to do the same calc in a 2d matrix?

--I have a vactor where some values are NaN.The results are on the following plot(in the red box the nan) :

--I was wondering if there is a way to assume the values so it will be something like this:

---Also how to do the same procedure if some values of 2d matrix is NaN? Thanks in advance.

Answer 1

[Andrei Bobrov]

Let X your array with NaN's

ii = ~isnan(X);
i0 = reshape(1:numel(X),size(X));

Xout = interp1(i0(ii),X(ii),i0);

[Dimitrios]

Can i ask also how to do it in a 2d matrix?

Answer 2

[Iain]

You've got an x & y vector, so this would remove the NaNs:

 nans = isnan(Y) || isnan(X);
 Y(nans) = [];
 X(nans) = [];

You'll need to interpolate if you want the X & Y for all the values of your original X.