MATLAB: Create array

array

Hi considering I want to make a a 3×6624 matrix of random numbers (>0 and <1) but I want the sum of each column of the3 numbers to add up to 1. Any help?

Thanks

Best Answer

a=zeros(3,6624);
for b=1:size(a,2)
c(1)=rand/3;
c(2)=rand/3;
c(3)=1-c(1)-c(2);
cr=randperm(3);
a(:,b)=[c(cr(1));c(cr(2));c(cr(3))];
end

Related Solutions

MATLAB: How to create a vector “a” when a(1)=rand,a(2)=a(1)+rand) a(3)=a(2)+rand whithout loop

Use rand and cumsum together:

N = 3;
A = rand(1,N);
B = cumsum(A);

MATLAB: Combine legends of two plots (Two plots are in a for loop)

You cannot "add" an entry to an existing legend, as far as I know. But you can create handles for you plots and concatenate the handles to create a handle for the legend that contains all plots:

 R = rand(4);
 h = plot(R)
 legend(h, '1', '2', '3', '4')
 hold on
 h2 = plot(mean(R), 'k', 'LineWidth', 2)
 legend([h; h2], '1', '2', '3', '4', 'Total')

Best Answer

Related Solutions

MATLAB: How to create a vector “a” when a(1)=rand,​a(2)=a(1)+​rand) a(3)=a(2)+rand whithout loop

MATLAB: Combine legends of two plots (Two plots are in a for loop)

Related Question

MATLAB: How to create a vector “a” when a(1)=rand,a(2)=a(1)+rand) a(3)=a(2)+rand whithout loop