Gri: `create' 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 | ## 12.6: The ``create`' Command ### 12.6.1: The ``create columns from function`' Command
    `create columns from function'
Plot a function of x which is defined in synonym \function.
    ENVIRONMENT
    \function = function to plot.
    \xmin     = minimum x value
    \xmax     = maximum x value
    \xinc     = increment in x values

    EXAMPLE
    \function = "cos(x)"
    \xmin     = "0"
    \xmax     = "2 * 3.14"
    \xinc     = "0.1"
    create columns from function
    draw curve
    quit
NOTE: This only works on machines which have the ``awk`' command available at the commandline. This means most unix machines and some vax machines. ### 12.6.2: The ``create image grayscale`' ... Command
    `create image grayscale banded .band.'
Make a banded grayscale with in units of .band. pixel values each. Thus, pixel values 0 to (.band. - 1) on the image will map to 0, while values from .band. to (2 * .band. - 1) will map to .band., etc. For example, .band. = 2 gives grayscale = (0 0 2 2 4 4 6 6 ... 252 252 254 254).