index out of bounds because numel(x)=1

Hi guys, I am writing a simple code to calculate probability of a two dimension t random number distribution with the Monte-Caro method as you can see. While there is error "Attempted to access x(2); index out of bounds because numel(x)=1." Many thanks for your help!

% MC estimate of probability
clear;clc;
n=10000;
x=trnd(6)*1+3;
y=trnd(6)*1+3;

%figure(1);
%plot(x,y,'r+')
c=0;s=0;
for i=1:n
    s=s+1;
    if 2<x(i)&&x(i)<4&&y(i)>4||x(i)>4&&y(i)>2 % inside the shadow
        c=c+1;
%        figure(2);
%        plot(x(i),y(i),'b+');
%        hold on;
    else % outside the shadow
%        figure(2);
%        plot(x(i),y(i),'r+');
    end   

end
p=c/s;

Attempted to access x(2); index out of bounds because numel(x)=1.

Error in normal (line 13)
    if 2<x(i)&&x(i)<4&&y(i)>4||x(i)>4&&y(i)>2 % inside the shadow

Answer 1

[Image Analyst]

Is x a 1D or 2D array - I don't have the stats toolbox so that's why I asked. With rand(), x would have been 2D. Anyway, try

for i=1 : size(x, 1)