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Kutzler & Kokol-Voljc: Introduction to D
ERIVE
5
33
Move the square to get a better approximation of the left zero.
Move the square near the left zero and note the cross coordinates in the Status Bar.
Now the change of sign happens between x=-0.62 and x=-0.618. Produce a graph with steeper
intersections to get a more accurate answer.
Zoom in vertically only, using the
Zoom vertical in
button
.
A highly recommended tool is the
Set range with box
button
, which allows to choose a crop
rectangle graphically.
Prepare for choosing a crop rectangle by using the
Set range with box
button
.
The mouse cursor turns into a crosshair.
Choose a crop rectangle: Click and hold the left mouse button at the top left corner of the
desired area. Drag the mouse down and to the right until the box encloses the desired area.
Release the mouse button.
The
Set 2D-Plot Range
dialog box is displayed, reflecting the numerical equivalents of the
choices you just made with the mouse. This dialog box could be obtained in the first place using
the
Set>Plot Range
command. But a graphical choice of the plot range is often more convenient.