SELECTING MATRIX ELEMENTS IN DESCENDING ORDER

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HEMRAJ PATEL
HEMRAJ PATEL 2021-12-7
评论： Mathieu NOE 2021-12-17
I WANT A PROGRAMME WHERE NUMBERS ARE SELECTED IN DESCENDING ORDER WITH THEIR INDICES (i,j) .
DO NOT ARRANGE THE MATRIX OR CHANGE ANYTHING IN MATRIX.
I JUST WANT SELECTION OF ELEMENTS IN DESCENDING ORDER.
THANKS.
A=[57 60 62 64 69 67 68 63 36 33;
52 45 25 37 49 55 58 49 39 34;
53 45 25 37 48 56 58 50 39 39;
56 48 41 76 159 164 153 158 171 130;
52 47 41 78 123 166 154 154 179 133;
39 43 41 41 45 64 95 93 74 73;
45 43 39 50 52 63 103 86 73 80;
45 35 13 17 30 36 62 54 34 30;
43 34 13 20 31 35 62 51 34 31;
18 19 15 39 85 97 115 78 24 23]

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回答（2 个）

Mathieu NOE
Mathieu NOE 2021-12-7
hello
try this
r = row index
c = col index
[value,ind] = sort(A(:),1,'descend');
[r,c] = ind2sub(size(A),ind)
Jan
Jan 2021-12-7
编辑：Jan 2021-12-7
This can be obtained by the 2nd output of the sort() command.
A=[57 60 62 64 69 67 68 63 36 33;
52 45 25 37 49 55 58 49 39 34;
53 45 25 37 48 56 58 50 39 39;
56 48 41 76 159 164 153 158 171 130;
52 47 41 78 123 166 154 154 179 133;
39 43 41 41 45 64 95 93 74 73;
45 43 39 50 52 63 103 86 73 80;
45 35 13 17 30 36 62 54 34 30;
43 34 13 20 31 35 62 51 34 31;
18 19 15 39 85 97 115 78 24 23];
[~, index] = sort(A(:), 'descend'); % [EDITED] 'descend' as 2nd input
[row,col] = ind2sub(size(A), index)

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