array to matrix

3 次查看（过去 30 天）
som
som 2012-4-23
Hi all,
I have an array like a:
a=[10 20 30 40];
I want to convert it to the matrix below, without using any for loop just by one command.
b=[ 10 10 20 20 30 30 40 40
10 10 20 20 30 30 40 40
10 10 20 20 30 30 40 40];
How can I do it. Thank you,

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2012-4-23
a = [10 20 30 40];
b = kron(a,ones(3,2))

更多回答（1 个）

Titus Edelhofer
Titus Edelhofer 2012-4-23
Hi Som,
the function you are looking for is named
repmat
Titus
  2 个评论
Andrei Bobrov
Andrei Bobrov 2012-4-23
and 'reshape'
Titus Edelhofer
Titus Edelhofer 2012-4-23
Hi Andrei, thanks! I admit I did not see the repetitions in the rows, so my solution would be repmat + reshape. Using kron is in this case the more elegant solution.

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