Find rows with maximum number and replace them with 1

I have a matrix with n rows and 1 column. I would like to find row which have the maximum number. Then, replace 1 in these rows and replace 0 in other rows.

For instance: I have matrix A and I would like to produce matrix B.

 A=
 5
 0
 0
 4
 3
 0

 B=
 0
 1
 1
 0
 0
 1

Answer 1

[Stephen23]

A = [5;0;0;4;3;0];
[cnt,idx] = histc(A,unique(A));
[~,idz] = max(cnt);
B = idx==idz;

outputs this

 >> B
 B =
   0
   1
   1
   0
   0
   1

and A = [1;1;0;4;3;1]; outputs this:

 >> B
 B =
   1
   1
   0
   0
   0
   1

[Maryam Hamrahi]

Thank you very much Stephen Cobeldick.nYour cooperation is really appreciated.

Also Thanks a lot José-Luis and Walter Roberson.

Answer 2

[Walter Roberson]

 B = A == min(A);

[Maryam Hamrahi]

Many thanks Walter Roberson .

Your code does not work for me when I have the following matrix:

 A=
 1
 1
 0
 4
 3
 1

the answer should be like this:

 B=
 1
 1
 0
 0
 0
 1

[Walter Roberson]

In your first example you want a 1 where each original value was 0, which was the smallest value in the matrix. In the second example, you do not want a 1 where each original value was 0, even though 0 is the smallest value in the matrix. Your examples are inconsistent with each other.

Also your original version talked about maximum but you wanted the 1 where the minimum was, so your examples are not consistent with the description either.

[Maryam Hamrahi]

Many thanks Walter Roberson.

I am not looking for the min. or max. values in the matrix.

I want to find rows which has the most frequent number. for instance in example 2, rows with number "1" are repeated three times. Therefore, I want to replace these rows with "1". However, in this example the numbers are already 1. Afterward, I want to replace 0 in other rows.

Thank you for the cooperation.

[Maryam Hamrahi]

Please also look at my comment for José-Luis.

Thanks a lot.

Answer 3

[José-Luis]

What you ask and the example you show are not consistent. To produce what you show:

 B =  A == 0

[Maryam Hamrahi]

Many thanks José-Luis. Please see my comment for Walter Roberson.

If you look at the following example, 2 is the most frequent number in the matrix, so, I want to replace this number with 1. Afterward, I want to replace 0 in the other rows.

 A=
 2
 2
 0
 4
 3
 2

 B=
 1
 1
 0
 0
 0
 1