MATLAB: How to combine workspaces using the workspace name

Question

I have individual workspaces with names A1,A2,A3…A200. The workspaces all have two columns but varying number of rows. I have been trying:

for k=1:1:200
data=eval(sprintf('A%d',k);
a=[data];
end

However, this just gives me a workspace with the values from workspace A200. What is the most efficient way to combine all the workspaces into one with 2 columns?

Answer 1

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F