That works great too. One more question now. I would like a particular MetaPost label to contain the value of a variable, say n. I don't want to use

label(decimal(n),origin);

because I want the label to be a TeX picture instead of a string. That is, I would like to have

label(btex n etex,origin);

where n is the VALUE of n and not the letter n.

Thanks,

Troy