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(emacs-lisp-intro.info)print-Y-axis

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The `print-Y-axis' Function
===========================

   The job of the `print-Y-axis' function is to print a label for the
vertical axis that looks like this:

         10 -
     
     
     
     
          5 -
     
     
     
          1 -

The function should be passed the height of the graph, and then should
construct and insert the appropriate numbers and marks.

   It is easy enough to see in the figure what the Y axis label should
look like; but to say in words, and then to write a function definition
to do the job is another matter.  It is not quite true to say that we
want a number and a tic every five lines: there are only three lines
between the `1' and the `5' (lines 2, 3, and 4), but four lines between
the `5' and the `10' (lines 6, 7, 8, and 9).  It is better to say that
we want a number and a tic mark on the base line (number 1) and then
that we want a number and a tic on the fifth line from the bottom and
on every line that is a multiple of five.

Height of label

What height for the Y axis?

Compute a Remainder

How to compute the remainder of a division.

Y Axis Element

Construct a line for the Y axis.

Y-axis-column

Generate a list of Y axis labels.

print-Y-axis Penultimate

A not quite final version.