Rearranging a vector in matlab?

Let's say your vector x has n elements. And you want to update the i-th segment and divide it into k parts. Then: x = x(1:i-1), x(i):((x(i+1) - x(i))/k):x(i+1), x(i+2:n).

One way to do this is: x = 0:0.25:1; xrefined3 = x(1):0.25/3:x(2) x(2:end-1) x(end-1):0.25/3:1; xrefined5 = x(1):0.25/5:x(2) x(2:end-1) x(end-1):0.25/5:1.

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