Sentry Industries CA756 - Manual (Page 55)

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User generated function graphs
After performing range settings, user generated graphs can
be drawn simply by entering the function (formula) after
pressing .
Here, let's try drawing a graph for y=2x 2 + 3x -4.
Set the ranges to the values shown below.
Xmin: -5 Ymin: -10
Xmax: 5 Ymax :10
Xscl: 2 Yscl: 4
Input the functional formula after pressing the key.
The result produces a visual representation of the formula.
Function graph overdraw
Two or more function graphs can be overdrawn, which
makes it easy to determine intersection points and
solutions that satisfy all the equations.
Here, let's find the intersection points of the
previously used
y=2x 2 +3x -4 and y=2x + 3.
First, clear the graph screen in preparation for the first
graph.
In this way it can be easily seen that there are two
intersections for the two function graphs. The approximate
coordinates for these two intersections can be found using
the Zoom function and the Trace function described in the
following section.
* If the maximum and minimum values of an axis are equal,
and error (Ma ERROR) will be generated when an
attempt is made to produce a graph.
* When a range setting is used that does not allow display
of the axes, the scale for the y-axis is indicated on either
the left or right edge of the display, while that for the x-
axis is indicated on either the top or bottom edge. (In both
cases, the location of the scale is the edge which is
closest to the origin (0,0)).
* When range values are changed (reset), the graph
display is cleared and the newly set axes only are
displayed.
* Range settings may cause irregular scale spacing.
* If the range is set too wide, the graph produced may not
fit on the display.
* Points of deflection sometimes exceed the capabilities of
the display with graphs that change drastically as they
approach the point of deflection.
* An Ma ERROR is generated when ranges are extremely
narrow.
• Range reset
Range values are reset to their initial values by pressing
during range display.
The initial values are as follows.
Xmin: -3.8 Ymin: -2.2
Xmax: 3.8 Ymax :2.2
Xscl :1 Yscl: 1
(Reference)
Range settings are performed within programs using the
following format:
Xmin value, Xmax value, Xscl value, Ymin value,
Ymax value, Yscl value. Up to six data items are
programmed after the command. When less than six
items are programmed, range setting is performed in the
order from the beginning of the above format.