how to interpolate x with y and vice versa ?

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

回答(1 个)

ANKUR KUMAR
ANKUR KUMAR 2018-9-14
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.
  4 个评论
Manoj
Manoj 2018-9-15
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
ANKUR KUMAR 2018-9-15
First input of interp, spline or pchip must be either decreasing or increasing. Read these ( a , b , c ) documentation for details

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