That is a mesh plot.
% here I'm making up data with the same sizes as yours
dates = 1:224;
maturities = (1:10)';
values=rand(224,10);
% here I'm plotting the mesh plot. Of course you'll use your data
mesh(maturities,dates,values);
% if you need to swap the axes then go
mesh(dates,maturities,values');
You can consider using the surf function instead of mesh. Another option is waterfall. Type "help mesh" (and in general "help function") to get the documentation.
