How to use interp1 with data neither in increasing order nor decreasing order.

I have two data sets. One is in increasing order while its corresponding value is in random order (neither increasing nor decreasing only). I know interp1 can be used only for increasing data sets. Let me know how can i use it for this particular case.

Please reply at the earliest. Thanks!

Answer 1

[Star Strider]

The interpolation functions such as interp1 require only that the independent variable be monotonically non-decreasing. The dependent variable can do anything it wants to.

Answer 2

[Azzi Abdelmalek]

x=0:2:10  %  is sorted
y=rand(size(x))  % y is not sorted
xi=[1 3 5]
yi=interp1(x,y,xi)

If this is what you've asked, this example shows it works