...do:

The final ``.'' on the first line is not a period to end the sentence. We assume that you are familiar with basic UNIX commands. If not, we strongly advise you to read the first couple of chapters of any introductory book on UNIX before continuing.

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...Wiggle.

If you just got an error message don't panic yet, just keep reading.

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...them.

Hardcopy devices will print out three separate pages of plots. On devices where you can see either the text screen or the graphics screen (but not both at the same time) you may have to hit ``Return'' to work through the sequence of plots one at a time. On most other screen devices the three plots will simply zip by in quick succession; you have to give an option to tell it to slow down or wait for a keypress. If your pen program is Xtpen it will animate the three frames for you, Movie-style.

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...trace.

If not, you can always check by running In Txx.H!

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...waves.

Of course you should have expected an anisotropic example given the first author!

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