Why are my Gaussian distributions not properly being generated?

N1 = 1e4;

Y1 = randn(N1,-5,4);

%

N2 = 1e4;

Y2 = randn(N2,5,3);

N3 = 1e4;

Y3 = randn(N3,0,5);

figure(5); clf

histogram(Y3,'Normalization','pdf');

hold on;

%plot(0:Y3-1,1/Y3*ones(size(1:Y3)),'r','LineWidth',2), could not get this

hold off

xlabel('random variable $x$','Interpreter','latex','FontSize',20)

ylabel('Probability density','Interpreter','latex','FontSize',20)

title('Continuous uniform PDF','Interpreter','latex','FontSize',20)

[Kevin Nelson]

I'm supposed to be adding Y1 and Y2 (I was told to add the means (-5 + 5 = 0) and the SD (sqrt(4^2 + 3^2) to get Y3, if that is even right

Answer 1

[Walter Roberson]

Y1 = randn(N1,-5,4);

The numeric parameters to randn() are all sizes so you asked for an array that is N1 by negative 5 by 4.

I suspect that you want

Y1 = randn(1,N1) * 4 - 5

which is multiply by standard deviation and add the mean.