How to add NaN columns in a vector?

I have a vector X which is a 1*38 double (x1,x2,x3,x4,x5,....x38). I want to calculate the difference between every adjacent cell (for example, between x3 and x4, x4 and x5 etc.) and if the difference is greater than 0.0002, I want NaN columns to be added between the two adjacent cells, such that the number of columns between adjacent cells will equal the difference divided by 0.0002.

Answer 1

[Roger Stafford]

Let X be your row vector.

   p = cumsum([1,1+floor(abs(diff(X))/0.0002)]);
   T = NaN(1,p(end));
   T(p) = X;
   X = T;

(Note: This doesn't reshape X. It extends its length by the insertion of NaNs.)