Extracting multiple subarrays from a given array in a loop, when the corresponding mulitple start- and end-point pairs are given

Assume I have an array of given size, say 100. I have 5 pairs which specify the start and end-point indices of the subarrays I would like to extract from the original array.

How to do this task in a for loop and in each iteration, store the subarray in a different vector? (because all subarrays may not be of same size)

Answer 1

[Daniel]

You can create a cell array with curly braces:

cellArray = {};

Elements of a cell array can be anything, for instance variable-size vectors. Even the data types can be different, though that's not relevant to your question.

cellArray{1} = [1 2 3];
cellArray{2} = [single(4)];
cellArray{3} = false;
cellArray{4} = dsp.SineWave;

You can read the cell array the same way as writing it:

for i=1:length(cellArray)
    cellArray{i}
end

ans = 1×3

1 2 3

ans = single 4

ans = logical
   0

ans = 
  dsp.SineWave with properties:

          Amplitude: 1
          Frequency: 100
        PhaseOffset: 0
      ComplexOutput: false
             Method: 'Trigonometric function'
    SamplesPerFrame: 1
         SampleRate: 1000
     OutputDataType: 'double'

Now if you store your starting and ending indices in an appropriate matrix (say 5x2), you can create your cell array of variable-size vectors iteratively in a for loop.