Reshape array with respect to other array

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Turbulence Analysis 2023-10-7

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https://ww2.mathworks.cn/matlabcentral/answers/2030379-reshape-array-with-respect-to-other-array

编辑： dpb 2023-10-7

Hi,

I have the time stamps stored in the array named A (mx1) and image data stored in B (mx1). I need to reshape the data in the array B to 1280 by 720 based on each time stamps stored in the array A. Basically at the end the array B becomes three dimensional array mxnxy.

May I know how to do this

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Star Strider 2023-10-7

There are 35431 unique time stamps in ‘A’. How are those supposed to be parsed to get a (1280 x 720) matrix?

dpb 2023-10-7

编辑：dpb 2023-10-7

在 MATLAB Online 中打开

matlab.mat

load matlab
whos
  Name         Size               Bytes  Class     Attributes

  ans          1x35                  70  char                
  cd_data      1x1             19985888  struct              
  cmdout       1x33                  66  char                
clear ans cmdout
cd_data
cd_data = struct with fields:
    A: [624538×1 double]
    B: [624538×1 double]
    C: [624538×1 double]
    D: [624538×1 double]
N=1280*720
N = 921600
numel(cd_data.A)/N
ans = 0.6777

Not to mention that there aren't enough elements in B to create a 1280x720 array, anyways...

plot(cd_data.A)

numel(cd_data.A)/numel(unique(cd_data.A))

ans = 17.6269

shows there is an average of about 18 values of A for each unique A...but the plot shows A isn't resetting to some particular value and repeating that, either; it shows an increasing slope over the entire range.

stairs(diff(cd_data.A),'-+')

xlim([0 400]), ylim([0 1.05])

There appear to be sets in the data but of differing lengths so even breaking at those can't go into commensurate sized arrays even if were to reduce the supposed array size.

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