Manipulating Arrays using for loop

I want to automate this

x1=[503 573 604 623 608 175 1000 1224 1358 2221];

x2=[503 573 604 623 608 175 1000 1224 1358 2221];

x3=[503 573 604 623 608 175 1000 1224 1358 2221];

x4=[503 573 604 623 608 175 1000 1224 1358 2221];

Where I have my x1, x2, x3 and x4 instead of reapeation over.

Answer 1

[madhan ravi]

doc repmat

[Walter Roberson]

Don't Do That.

http://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval