Gri: `interpolate' command

Gri Commands 1: Introduction 2: Simple example 3: Fancy example 4: Running Gri 5: Programming Gri 6: General Issues 7: X-Y Plots 8: Contour Plots 9: Image Plots 10: Examples 11: Handling Data 12: Gri Commands 13: Gri Extras 14: Evolution of Gri 15: Installing Gri 16: Gri Bugs 17: System Tools 18: Acknowledgments 19: License 20: Newsgroup 21: Concept Index | ## 12.21: The ``interpolate`' Command
    interpolate x grid to .left. .right. .inc.|{/.cols.}'
    interpolate y grid to .bottom. .top. .inc.|{/.rows.}'
Transform grid by interpolating between existing grid data, according to a new x or y grid specified in the manner of ``set x grid`' and ``set y grid`'. Note that the new grid is neccessarily regular, while the first grid needn't have been. The data of the new grid are constructed by interpolation, using the same interpolation algorithm as the ``convert grid to image`' command.