create sub arrays from a array

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Ricky 2013-6-5

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https://ww2.mathworks.cn/matlabcentral/answers/78100-create-sub-arrays-from-a-array

采纳的回答： Azzi Abdelmalek

Hello Everyone,

I am new to MATLAB so I am asking a very basic question which I am not able to solve.

I have an array of diemensions 672*9 , I want to create smaller arrays by comapring the value of column 9 only.

So for example my values in column 9 are

3.5

3.1

3.2

3.5

I specify the threshold value as 3.4 . So as my values in first 4 rows is more than 3.4 I store them in a new array. Then next 3 values in second array and finally last 2 values in third array.

I hope I have framed the question properly.

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采纳的回答

Azzi Abdelmalek 2013-6-5

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https://ww2.mathworks.cn/matlabcentral/answers/78100-create-sub-arrays-from-a-array#answer_87802

编辑：Azzi Abdelmalek 2013-6-5

在 MATLAB Online 中打开

Edit

a=[4,4,4,3.5,3,3.1,3.2,4,3.5];
idx=a>=3.4;
idx2=sort([strfind(idx,[true false]) strfind(idx,[false,true]) numel(a)]);
idx1=[1 idx2(1:end-1)+1];
% pre-allocate;
y=cell(1,numel(idx));
for k=1:numel(idx1)
 y{k}=a(idx1(k):idx2(k));
end
y{1}
y{2}
y{3}