may i ask how to sort the row of matrix in large data?

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loong seow li
loong seow li 2016-5-6
评论： loong seow li 2016-5-6
may i ask how to sort the row of matrix in large data? For example, there are 28694 rows... how I arrange the rows according my own number?
a=[a0, a1,................,a28694]
Let say I want arrange in
b=[a4,a5,a28694,.......,a2,a56,a34]
is that possible arrange like this?

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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2016-5-6
a=[10 20 4 5]
idx=[2 1 3 4]
out=a(idx)

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