How can I break a long column vector (281820X1) into 140 short column vectors (2013X1)?

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Xuyang He 2023-12-15

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https://ww2.mathworks.cn/matlabcentral/answers/2061067-how-can-i-break-a-long-column-vector-281820x1-into-140-short-column-vectors-2013x1

评论： Les Beckham 2023-12-15

I collected the raw data from a Raman image which acquired 140 Raman spectra from a 14X10 rectangular area. The resulting data file contains 281820 rows for all the spectra so how should I restore the 140 individual data files?

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Answer 1

Les Beckham 2023-12-15

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https://ww2.mathworks.cn/matlabcentral/answers/2061067-how-can-i-break-a-long-column-vector-281820x1-into-140-short-column-vectors-2013x1#answer_1372467

编辑：Les Beckham 2023-12-15

在 MATLAB Online 中打开

Use reshape

data = (1:281820)';
cols = 140;
rows = numel(data) / cols;
data_reshaped = reshape(data, [rows cols]);
whos
  Name                    Size               Bytes  Class     Attributes

  cmdout                  1x33                  66  char                
  cols                    1x1                    8  double              
  data               281820x1              2254560  double              
  data_reshaped        2013x140            2254560  double              
  rows                    1x1                    8  double              

Also, if you are just getting started with Matlab, I would highly recommend that you take a couple of hours to go through the free online tutorial: Matlab Onramp