How to sort one array and use the order to sort a second array in MATLAB

Question

Suppose i have two arrays a=[4 3 6 1 7 8] b=[3 5 1 8 4 6]

I need to sort b in the same order as a, which will be sorted in ascending order ie.,

first sorting a a=[1 3 4 6 7 8] whose corresponding indices will be [4 2 1 3 5 6] and using this indices, i have to sort b, ie., b=[8 5 3 1 4 6]

how do i do this in MATLAB

matlabgui · Accepted Answer · 2015-04-09 14:42:26Z

2

see the 2nd output of sort

[sortedArray,sortedIndex] = sort(a)
b(sortedIndex)

answered Apr 9, 2015 at 14:42

matlabgui

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Comments

Reed Espinosa · Accepted Answer · 2015-04-09 14:45:13Z

1

The second output of sort describes the ordering of the elements. See doc sort

[aSrt, ind] = sort(a);
bSrt = b(ind);

answered Apr 9, 2015 at 14:45

Reed Espinosa

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