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Θ Press „ô, simultaneously if in RPN mode, to access to the PLOT SETUP
window.
Θ Press ˜ and type ‘(X^2/36+Y^2/9 < 1)⋅ (X^2/16+Y^2/9 > 1)’@@@OK@@@ to
define the conditions to be plotted.
Θ Press @ERASE @DRAW to draw the truth plot. Again, you have to be patient
while the calculator produces the graph. If you want to interrupt the plot,
press $ , once. Then press @CANCEL .
Plotting histograms, bar plots, and scatter plots
Histograms, bar plots and scatter plots are used to plot discrete data stored in
the reserved variable ΣDAT. This variable is used not only for these types of
plots, but also for all kind of statistical applications as will be shown in Chapter
18. As a matter of fact, the use of histogram plots is postponed until we get to
that chapter, for the plotting of a histogram requires to perform a grouping of
data and a frequency analysis before the actual plot. In this section we will
show how to load data in the variable ΣDAT and how to plot bar plots and
scatter plots.
We will use the following data for plotting bar plots and scatter plots:
Bar plots
First, make sure your calculator’s CAS is in Exact mode. Next, enter the data
shown above as a matrix, i.e.,
[[3.1,2.1,1.1],[3.6,3.2,2.2],[4.2,4.5,3.3],
xyz
3.1 2.1 1.1
3.6 3.2 2.2
4.2 4.5 3.3
4.5 5.6 4.4
4.9 3.8 5.5
5.2 2.2 6.6