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  1: Introduction
  2: Simple example
  3: Invocation
  4: Finer Control
  5: X-Y Plots
  6: Contour Plots
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  8: Examples
  9: Gri Commands
  10: Programming
  11: Environment
  12: Emacs Mode
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  16: Test Suite
  17: Gri in Press
  18: Acknowledgments
  19: License

index.html#Top ListOfGriCommands.html#ListOfGriCommands Gri: `create' command Gri: `delete' command index.html#Top Gri: `delete' command

9.3.6: `debug'

`debug [.n.]|[clipped values in draw commands]|off'

With no optional parameters, sets the value of `..debug..' to 1. (Normally, `..debug..' is 0.) You may use `..debug..' in `if' statements, etc. Note that `..debug..' is also set to 1 when gri is invoked with the commandline switch `-d'.

With `.n.' specified, `..debug..' is set to `.n.'; a value of zero for `.n.' turns debugging off, while 1 turns it on. Higher values may be used for deeper debugging, if you choose:

if {rpn ..debug.. 2 <}
  # Code to do if ..debug.. is greater than 2.
end if

Note that you can assign to `..debug..' as you can to any other variable; `debug .n.' is equivalent to `..debug.. = .n.'. With the `clipped' option, Gri prints any clipped data encountered during any `draw ...' commands, EXCEPT in the case of `postscript' clipping, where no check is possible. (Note that `..debug..' is not affected.)

All these forms of debugging are cancelled by `debug off'.

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