Split a vector

2011 9 21
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Hi,
I have a question regarding vectors: I have a vector of size n and I want to split the vector by a matlab function so that I get elements 1-10, 2-11, 3-12....
Is there any built-in-function?
Thanks!

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Grzegorz Knor
Grzegorz Knor 2011-9-21

0 个投票

Split to one matrix:
n = 20;
% create vector a
a = 1:n;
m = cell2mat(arrayfun(@(x)a(x:x+9)',1:n-9,'UniformOutput',false));
Splitting to one matrix you can also perform with this code:
a = rand(20,1)
n = length(a);
[x y] = meshgrid(0:n-10,1:10);
a(x+y)
Split to vectors:
n = 20;
% create vector a
a = 1:n;
for k=1:n-9
eval(['vec' num2str(k) ' = a(k:k+9);'])
end

更多回答（1 个）

fcarl
fcarl 2011-9-21

0 个投票

I think I did not describe my problem exactly. My aim is to vectorize for example this code:
x=10;
vec=1:1000;
result=[];
for i=1:end-x
result[i]=vec(i:i+x);
end;

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Grzegorz Knor
Grzegorz Knor 2011-9-21
In my opinion I've given the solutions in the post above :)
x=10;
vec=1:1000;
[i1 i2] = meshgrid(0:x-1,1:length(vec)-x+1);
result = vec(i1+i2)

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