MATLAB: How do i generate a random set of numbers of -1s and 1s without getting any 0s

random number generatorskipping numbers

I tried using the program below to generate numbers between -1 and 1 while skipping a number but it doesn't seem to work. x=round(randi([-1:2:1],[1000,1]))

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a=nonzeros((randi([-1:2:1],[1000,1])))

Related Solutions

MATLAB: Find a command that will generate a pseudo-random number(random number) that lies bwtween -1 and 1 drawn from uniform distribution

You haven't looked very far, rand is what you want:

n = 2 * rand(1, 1000) - 1; %generate 1000 numbers between -1 and 1

MATLAB: Counting consecutive occurences of 1s and -1s

The first step below counts all consecutive numbers. The second step eliminates the 0-counts.

A = [0 0 1 1 1 1 0 0 0 -1 -1 -1 0 1 1 0 ]; 
changeIdx = [1,diff(A)]~=0; 
counts = histcounts(cumsum(changeIdx),1:sum(changeIdx)+1); 
consecutiveCounts = [A(changeIdx)',counts']
% Result:
consecutiveCounts =
     0     2            %First there are 2 zeros
     1     4            %then 4 ones
     0     3            %then 3 zeros
    -1     3            %then 3 negative ones
     0     1            % etc...
     1     2
     0     1

To get the vector you described, eliminate the 0-counts and multiply by the sign of the value in A so counts of negative numbers are negative.

  consecutiveCounts(consecutiveCounts(:,1)~=0,2)' .* sign(consecutiveCounts(consecutiveCounts(:,1)~=0,1))'
ans =
     4    -3     2

Best Answer

Related Solutions

MATLAB: Find a command that will generate a pseudo-random number(random number) that lies bwtween -1 and 1 drawn from uniform distribution

MATLAB: Counting consecutive occurences of 1s and -1s

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