HP (Hewlett-Packard) 50g ユーザーズマニュアル

Page 12-29

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 .

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:

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],

x

y

z

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