Getting dimension indexes based on element index

Hi,

I have a 5D matrix, I found the minimum value and minimum index along the whole elements.

How can I know this minimum belongs to which row, which column, which page. I mean for example if the minimum index is 1108.

How can I know at which row, column and pages, this elmentes locates?

Thanks.

Answer 1

[Karim]

You can use the ind2sub function for this (link --> Convert linear indices to subscripts - MATLAB ind2sub (mathworks.com) )

See below for an example

% random 5D matrix
M = rand(10,10,10,10,10);
% find the minium and its index
[min,idx] = min(M,[],'all')

min = 5.4030e-06

idx = 55455

% convert to subscripts
[I1,I2,I3,I4,I5] = ind2sub(size(M),idx)

I1 = 5

I2 = 6

I3 = 5

I4 = 6

I5 = 6

[Zahra Yousefi Darani]

Wow! Thanks a lot!

Answer 2

[Chunru]

a = randn(2,3,4,5,6);
[amin, i]=min(a(:))

amin = -2.6982

i = 618

[i1, i2, i3, i4, i5] = ind2sub([2,3,4,5,6], i)

i1 = 2

i2 = 3

i3 = 3

i4 = 1

i5 = 6

[Zahra Yousefi Darani]

Thanks!