MATLAB: Index out of bounds because numel(x)=1

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

Best Answer

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)
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