Filling up a vector
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Suppose I have 1 by 2N vector
x=zeros(1,2*N);
Now I have N of 1 by 2 vector
y1=ones(1,2), y2=ones(1,2)
and I want to fill x as
[y1 y2 ...]
what will be a compact way to fill x in this way (instead of concatenation)?
1 个评论
Stephen23
2018-4-2
Do NOT do this! The MATLAB documentation specifically advises against what you are trying to do: "A frequent use of the eval function is to create sets of variables such as A1, A2, ..., An, but this approach does not use the array processing power of MATLAB and is not recommended. The preferred method is to store related data in a single array"
Read this to know more:
回答（1 个）
Walter Roberson
2018-3-27
x(1:2:end) = y1;
x(2:2:end) = y2;
or
x = reshape([y1; y2], 1, []); %requires that y1 and y2 be row vectors
or
x = reshape([y1(:), y2(:)].', 1, []); %does not requires that they be row vectors
3 个评论
Walter Roberson
2018-3-28
编辑：Walter Roberson
2018-3-28
Though I see now that I misinterpreted your question -- I thought you wanted alternating elements, but instead you were looking for dynamic variable names.
alpedhuez
2018-3-28
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