how can partition a vector into smaller sub sequences

Question

hanadi abbas 2021-4-7

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https://ww2.mathworks.cn/matlabcentral/answers/794892-how-can-partition-a-vector-into-smaller-sub-sequences

评论： hanadi abbas 2021-4-7

Hi,

how can partition a vector into smaller sequences: for example, let A is a vector of 179901, N is another vector consists of 204 elements. I want to partition A into several sub sequences according to values of vector N such that

seq1=A(1:N(1))

seq2=A(1+N(1):N(1)+N(2))

seq3=A(1+N(1)+N(2):N(1)+N(2)+N(3))

and so on for other sequences

how can do this, I use MatlabR2017a. Thanks in advance

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Answer 1

Stephen23 2021-4-7

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https://ww2.mathworks.cn/matlabcentral/answers/794892-how-can-partition-a-vector-into-smaller-sub-sequences#answer_669117

编辑：Stephen23 2021-4-7

在 MATLAB Online 中打开

A = 1:19;
N = [3,5,7];
S = mat2cell(A(1:sum(N)),1,N)
S = 1×3 cell array
    {[1 2 3]}    {[4 5 6 7 8]}    {[9 10 11 12 13 14 15]}

Or

V = cumsum([0,N]);
F = @(b,e)A(1+b:e);
S = arrayfun(F,V(1:end-1),V(2:end),'uni',0)
S = 1×3 cell array
    {[1 2 3]}    {[4 5 6 7 8]}    {[9 10 11 12 13 14 15]}

https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-cell-array.html