Calculate linear interpolation of a vector

Question

Nicola Caldognetto 2017-11-6

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/365438-calculate-linear-interpolation-of-a-vector

回答： Star Strider 2017-11-6

Hi, I have this problem that I can't resolve. I have a column vector with a numerical value at the beginning of it and at the end example

X=[4 0 0 0 0 0 0 8]'

I need to calculate all the intermediate value making the average of the two values. Example in the position on the center o the vector it should be (8+4)/2=6

I have tried with a recursive method but I can't resolve it. Is there a simply way to do that?

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Answer 1

Star Strider 2017-11-6

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/365438-calculate-linear-interpolation-of-a-vector#answer_289761

在 MATLAB Online 中打开

If you actually want to interpolate, this works:

X = [4 0 0 0 0 0 0 8]';
Xnz = X(X ~= 0);                                % Non-Zero Elements
vnz = find(X ~= 0);                             % Indices Of Non-Zero Elements
iv = 1:length(X);                               % Interpolation Vector
Xi = interp1(vnz, Xnz, iv, 'linear')'           % Interpolate To Get Desired Output
Xi =
          4.00
          4.57
          5.14
          5.71
          6.29
          6.86
          7.43
          8.00