random matrix with fix summation
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Hello
please.
this is my simple code that create (3*3) random matrix that all elements are 0 or 1.
a=randi([0,1],[500,500])
but is there any way that I define the number of elements that are 1. for example number of elements that are 1 be 7000 or in other word summation of matrix "a" be 7000
Thank you.
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Adam
on 15 Jan 2015
Edited: Adam
on 15 Jan 2015
You can just create 7000 random indices instead and place the 1s at those indices
e.g. if you have a [500,500] matrix you have 250000 indices so create 7000 random indices from 1 to 250000 and then just assign 1s to all those indices of a 500 x 500 matrix.
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Mohammad Abouali
on 15 Jan 2015
just change "... so create 70 random indices ..." to "... so create 7000 random indices ..."
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