how to interpolate x with y and vice versa ?

Find the attachment consists of two columns. 1st column should be interpolated with 2nd column and 2nd column should be interpolated with 1st column.

Answer 1

[ANKUR KUMAR]

Try using interp2, spline or pchip. "interpolate first coloumn with second" ????

Lets see an example. A contains the data over 10 points. If you want to interpolate A on finer intervals (say in interval of 0.1), then code would like like:

A=randi(10,1,10);
interp1((1:10),A,(1:0.01:10))
spline((1:10),A,(1:0.01:10))
pchip((1:10),A,(1:0.01:10))

Above are the three different methods of interpolating linear matrix.

Hope you can relate this simple example with your problem.

[Manoj]

Thank you ankur ,but didnt get the result with the attachment one

[ANKUR KUMAR]

Elaborate your question might helps you to get an answer a bit more effectively.

[Manoj]

2nd column consist of 6862 values (i.e up to 18.8) I need to interpolate these 6862 values with 1st column up to 64 values (i.e up 18.9). so that 6862 values should equals to 64 values .

[ANKUR KUMAR]

First input of interp, spline or pchip must be either decreasing or increasing. Read these ( a , b , c ) documentation for details