(a) Plotting data on vertical bar or column charts. Prior to

drawing the chart, you must select the size of the paper and the proper

scale (as discussed earlier in this part of the lesson). The size of

the chart determines the size of the paper you must use. The chart

should fill the entire work piece proportionally, including space for

margins, explanatory notes, and the legend.

When you have determined the size of the paper and scale, you can begin

constructing the chart using a nonreproducible blue pencil. When

constructing this type of chart, there are two lines that serve as the

base of the chart, the Yaxis (vertical line) and the Xaxis (horizontal

line) (figure 112).

Figure 112. X and Yaxis

To illustrate the steps required to construct a vertical bar or column

chart, this portion of the lesson describes the steps required to

complete the chart in figure 113. This chart shows the base pay of an

E4 with 5 years of service. This chart also shows the base pay every 3

years from October 1, 1958 through October 1, 1970, using the following

data:

1958 170.00

1961 170.00

1964 210.00

1967 254.00

1970 330.00

A column chart uses the Xaxis for the data or time element. Reviewing

the data given above, you find you must plot 9 years or columns on this

axis. You start by marking the required spaces and the columns on the

Xaxis, except for the front and back space. These spaces equal 2/3 of

the width of a column (figure 114).