A two variale function(x,y) is need to integrate only with a single variable x. But we need to show how the integration prediction values change with the other variale y, for example, y changes from 0 degree to 90 degrees. Say, I need to integrate f(x,0),f(x,1),f(x,2),f(x,3), ...,f(x,90),respectively. Now, IDL's QROMB and QROMO cannot let us use a variable y chang. How can I do this bar? Who can debar this guestion, please tell me a.s.a.p. My email: strayingbird@sina.com