Chapters: 1: Introduction 2: Simple example 3: Invocation 4: Finer Control 5: X-Y Plots 6: Contour Plots 7: Image Plots 8: Examples 9: Gri Commands 10: Programming 11: Environment 12: Emacs Mode 13: History 14: Installation 15: Gri Bugs 16: Test Suite 17: Gri in Press 18: Acknowledgments 19: License Indices: Concepts Commands Variables | ## 8.2: Contouring This example plots a section of dT/drho vs x and rho (actually, sigma-t, as the label indicates). The contours are unlabelled; I'm only interested in the zero crossings. There are some other useful tricks in this example, such as calling ``awk`' and ``wc`' from the unix system. (In the plot shown, all ``query`' questions were answered with carriage return, yielding the defaults; the ``-p`' flag was specified on execution, so the time stamp was not drawn.) The command-file.