creating matrix of 1 nd -1

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umar siyab
umar siyab 2012-3-21
how can i generate random matrix of 1 and -1 ...
thanks in advance
  2 个评论
Thomas
Thomas 2012-3-21
Do you want the elements of the matrix to be only 1 and -1 or between 1 and -1
umar siyab
umar siyab 2012-3-21
i want my matrix to be 1 and -1 and it should be 256 by 256 ... basically i want a pesudo random bit generator which can generate a matrix of 1 and -1

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回答（2 个）

Jan
Jan 2012-3-21
1 and -1:
x = 1 - (rand(3,5) > 0.5) *2;
From -1 to 1:
x = 1 - rand(3,5) *2;
David Young
David Young 2012-3-21
Assuming that you want values of 1 and -1 only, you can do
2*randi(2, m, n) - 3
  1 个评论
umar siyab
umar siyab 2012-3-21
sorry it is undefined function in matlab i think ....m new to matlab so don'y know much about these fnction

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