Selecting one array out of three.

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shane watson
shane watson 2017-7-20
评论： shane watson 2017-7-20
I have three arrays, including A=[1 2 3 4 5 6 7 8 9 0 3 4 5 6]; B=[4 5 6 7 8 6 7 8 9 1 3 4 5 0]; C=[5 6 7 8 9 0 0 9 5 5 5 5 6 7]; Now I need to store one array in D i.e., D= any of one from three. Kindly help me out.

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Jan
Jan 2017-7-20
编辑：Jan 2017-7-20
Or:
A = [1 2 3 4 5 6 7 8 9 0 3 4 5 6];
B = [4 5 6 7 8 6 7 8 9 1 3 4 5 0];
C = [5 6 7 8 9 0 0 9 5 5 5 5 6 7];
Pool = {A, B, C};
D = Pool{randi([1, numel(Pool)])}
This is flexible compared to the swicth method: The Pool can have different sized without the need to adjust the code.

更多回答（2 个）

Adam
Adam 2017-7-20
n = randi( 3 )
switch ( n )
case 1
D = A;
case 2
D = B;
case 3
D = C;
end
If your 3 arrays where all in a single named variable as e.g. columns of a 2d array it would be neater, but not so much with named arrays.
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shane watson
shane watson 2017-7-20
Thank you, Adam, for your time. As it increases code length, but applicable in my work.

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John BG
John BG 2017-7-20
Hi Shane
this is John BG ( <mailto:jgb2012@sky.com jgb2012@sky.com> )
the best way to randomly choose one of those vectors with variable length is to put them in a cell
A=[1 2 3 4 5 6 7 8 9 0 3 4 5 6];
B=[4 5 6 7 8 9 1 3 4 5 0];
C=[5 6 7 8 9 0 0 9 5 5 5 5 6 7];
D=randi([1 numel(A2)],1,1)
if you find this answer useful would you please be so kind to consider marking my answer as Accepted Answer?
To any other reader, if you find this answer useful please consider clicking on the thumbs-up vote link
thanks in advance
John BG
<mailto:jgb2012@sky.com jgb2012@sky.com>

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