How can i get the index of all matrix value

hello!

i have a matrix A , i want to find the index of all value in the matrix not a specific value like shown in B

A=[7 9 10 12 14 B=[1 1 1 1 1

20 25 30 17 15 2 2 2 2 2

27 10 32 28 8 3 3 3 3 3

11 13 26 34 16] 4 4 4 4 4]

[KSSV]

What is the output you expect given A and B?

[Ideth Kara]

Résultats de traduction

from A i want to get B

[dpb]

And by what magic did you get B from A?

Answer 1

[Ameer Hamza]

Are you looking for something like this

A;
B = repmat((1:size(A,1)).', 1, size(A,2))

[Ideth Kara]

it works well, thank you so much

[Ameer Hamza]

I am glad to be of help!

Answer 2

[KALYAN ACHARJYA]

[r,c]=size(A);
B=reshape(repelem(1:c,r),[r,c])'

[Image Analyst]

Try again.

Answer 3

[Image Analyst]

The other answers only give you the row indexes, like you showed in your (badly named) "B" matrix. A coordinate has two values -- the row of the element and the column of the element. If you want the full coordinate (both row and column indexes) you can use meshgrid(). See below:

A=[  7   9    10    12    14
	20   25   30    17    15
	27   10   32    28     8
	11   13   26    34    16]
[columnIndexes, B] = meshgrid(1:columns, 1:rows)

You'll see the row indexes B as you wanted, but you'll also see the column indexes:

columnIndexes =

1 2 3 4 5

1 2 3 4 5

1 2 3 4 5

1 2 3 4 5

B =

1 1 1 1 1

2 2 2 2 2

3 3 3 3 3

4 4 4 4 4