splitting an array of numbers

Question

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I have an array of numbers, for example numbers = rand(1000,1);

I have another array of numbers indicating the offsets for the groups, for example,

offsets = [1, 100, 250, 900, 1000];

so the

first group = numbers(1:100)

second group = numbers(101:250)

third group = numbers(251:900)

fourth group = numbers(901:1000)

I could use a for loop to identify the groups but I want to know if there is a faster way.

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Answer 1

Andrei Bobrov 2012-10-10

0 个投票

numbers = rand(1000,1);
offsets = [0, 100, 250, 900, 1000];
out = mat2cell(numbers,diff(offsets),1);

Answer 2

Azzi Abdelmalek 2012-10-10

编辑：Azzi Abdelmalek 2012-10-10

0 个投票

 v=rand(1000,1)
 offsets = [0, 100, 250, 900, 1000];
 out=arrayfun(@(x) v(offsets(x)+1:offsets(x+1)),1:numel(offsets)-1,'uni',false)