Revision 15ae88a8-2928-4b0a-b643-ef5f159da03a - Stack Overflow

This is why The Creator gave the world arrays.

 var msgs = [];
 for (var i = 0; i < 200; ++i)
 msgs.push(parseFloat(json[i]['valor' + i]));

Note that your JSON data should also keep those "valor" properties as arrays, though in JavaScript you can deal with a bizarre naming scheme like that as in the example above.

*edit* &mdash; oops, typos fixed :-)