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Section 8.2 Common Plot Options
Table 8.1 lists the most frequently used optional parameters.
Aside Plotting commands generate graphs by connecting many points together. The number of points generated is typically more than sufficient. However, setting
numpoints = 30000 may help if a graph does not appear smooth. Using too large of a value may cause Maple to become unresponsive (see
Implicit Functions ).
Table 8.1. A list of common optional parameters for the plot() command
x=a..bPlot over the interval
\(x\in[a,b]\text{.}\)
y=c..dPlot over the interval
\(y\in[c,d]\text{.}\)
colour=cname
Specify the colour of the graph. A list of plot colours can be found by typing
?colours on a new Maple input.
discont=trueShow discontinuities in a function. This may need to be included to properly display the discontinuities in certain functions when you plot them.
linestyle=lstyle
Specify the style of the line (
solid,
dash,
dot, etc.).
gridlines=true
numpoints=n
Set the minimum number of points plotted for a smoother graph (Default
\(200\) ).
grid=[ m ,n ]Set the number of initial points used to plot a graph (Default
\(26 \times 26\) ).
scaling=constrainedForce axes to use the same scale (so a circle should appear perfectly round).
For some functions with vertical asymptotes, Maple does not always display the discontinuities correctly. Setting the parameter
discont=true may properly display the discontinuities in these functions.
Aside Without setting
discont=true, some versions of Maple will display the graph of
\(\tan(x)\) as a continuous function.
> plot(tan(x), x=-2*Pi..2*Pi, y=-10..10, linestyle=dash, discont=true);
In some modern versions of Maple, the graph of
\(\tan(x)\) above can be obtained even without including the
discont=true option in the
plot() command.
