Figure 1-13.
E-4 pay history column chart
Figure 1-14.
Plotting on the X-axis
When constructing a vertical bar or column chart, the space between the
columns is 2/3 the width of a column. For this chart, you must mark off
23 equal spaces with 2/3 of the width of a column before the first mark
and an equal space after the last mark. To ensure the correct spacing,
you should use a scale to mark off the 23 equal spaces.
Twenty three equal spaces may seem like an excess number of space for a
9-year period. However, you must consider the 2 to 3 ratio for the width
of the columns and to the spaces; A single column requires three spaces
and a distance between two columns requires two spaces to maintain the 2
to 3 ratio. Therefore, you can determine the number of columns using
simple mathematics.
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SS0530
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