Casio fx-CG50 User Manual page 523

Chapter 15
Note
fx-CG50 AU/fx-CG20 AU Users: Install the Picture Plot add-in application.
Picture Plot is an application that lets you plot points (that represent coordinates) on a
photograph, illustration, or other graphic and perform various types of analysis based on the
plotted data (coordinate values).
For example, the photograph below shows the nozzles of a fountain shooting thin streams of
water at different angles.
If we view the plane traced by the water of the nozzle closest to us in the photograph as an XY
Cartesian coordinate plane, we then will be able to express any point on the path traced by the
water as a coordinate (X, Y). The Picture Plot plot function makes it easy to plot points on a
photograph such as this or some other image, and extract the coordinate values of the plots.
Plotting points
You can use the plots to perform the following types of operations.
• Register and graph a Y=
also can use the graph Modify function (page 5-38) to adjust the coefficient values of the
expression and find a function that lines up better with the plots.
• Perform regression calculation based on the plotted coordinate values and draw a regression
graph that overlays the plots. This makes it possible to produce the mathematical expression
and graph of a path of movement.
Picture Plot
f x
( ) form equation and overlay it on a photograph and plot. You
Coordinates (plot list screen)
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