how can I linear interpolation without using function

i want linear interpolation id or 22d

and i have to liner interpolation without using function(interp1q)

Answer 1

[John D'Errico]

Simple. just use interp1. You are not allowed to use interp1q. But interp1 is not interp1q.

[grace]

No.. i don't want to use interp1 too.

Answer 2

[Walter Roberson]

You can use polyfit() with polynomial degree one less than the length of your data, and then use polyval on the new list of coordinates. It is not going to look nice with the data you posted before (and removed), but you can do it. Spline will look even worse but you can do that too.