Thank your very much for your answers. I will be more concrete now. As Doug explains, when you make a 3d plot in Maple, having two variables, the data are evaluated on a 25x25 grid. When you extract the data to a file in the way described by Schivnorr, you get series of 25 points in parentheses, corresponding to the values of the functions for a single value of one of the variables, and sweeping the values of the other variable. I would like to generate a .txt file with every (x,y,z) point of the plot in three columns so they could be directly imported in an Origin worksheet. Is that possible? Please replace this text with the link to your file. The link can be found in the File Manager Please replace this text with the link to your file. The link can be found in the File Manager