random assignment to 1s in a matrix

c= birincifaz(:,:)

x=find(c==1)

ja=randi(613,1)

c(x(ja))= randi(10,1)

Hi. I have set up such code. My matrix is very large in 10x69 structure, I want to assign a random number from one to eighteen where 1 is written in the matrix. and it takes too long to assign manually so I want to assign by code. I was able to assign 1 to 1 with this code. How can I set up code about assigning to other 1's? ( Caution ! I wrote birincifaz values below.)

thanks a lot of

birincifaz=

1 1 1 1 1 0 1 1 1 1

0 0 0 0 0 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 0 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

0 0 0 0 0 0 1 0 0 0

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 1 0 0 0

0 0 0 0 0 0 1 0 0 0

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 1 0 0 0

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1

1 1 1 1 1 1 1 1 1 1

Answer 1

[Jan]

I do not understand the question:

"I was able to assign 1 to 1 with this code." - what is the purpose of setting a 1 to a 1?

"How can I set up code about assigning to other 1's?" - which other 1's? Ah, you have changed one single 1 and want to change all. Then:

c = birincifaz;  % No need for: (:,:), no need for FIND.
c(c == 1) = randi(18, 1, nnz(c))

[Berfin Çetinkaya]

This is the correct answer! Thank you so much.

Answer 2

[Davide Masiello]

c = randi([0,1],69,10)                     % This replaces your biricinfaz, didn't want to copy that ;)

c = 69×10

0 0 0 0 1 1 1 0 0 0 0 0 0 0 1 1 1 0 1 1 0 0 1 1 1 1 0 1 0 0 1 0 1 1 0 1 1 1 1 1 0 0 1 0 0 0 1 0 1 0 1 0 0 0 1 0 1 0 0 1 0 1 1 1 0 1 1 1 0 1 0 1 0 1 0 0 1 1 0 0 0 1 0 1 1 1 0 1 1 1 0 1 0 0 0 1 1 0 0 0

c(logical(c)) = randi(18,sum(c(:)),1)      % This insert random values up to 18 in place of the 1s in c

c = 69×10

0 0 0 0 13 6 14 0 0 0 0 0 0 0 8 11 13 0 7 14 0 0 13 3 10 17 0 11 0 0 8 0 7 2 0 2 1 7 7 16 0 0 8 0 0 0 14 0 12 0 16 0 0 0 10 0 6 0 0 3 0 2 7 8 0 9 5 6 0 6 0 16 0 13 0 0 8 12 0 0 0 14 0 18 11 3 0 11 9 3 0 10 0 0 0 10 6 0 0 0

[Berfin Çetinkaya]

Your code worked. This is the correct answer. Thank you for your help.