Graph Editing

See Also: Data Table  Differential Equations Solver

Polymath Graph from Data Table

The data contained in the Polymath Data Table can be integrated into graphs by pressing on the "Prepare Graph" tab at the top right of the Data Table window.  This is illustrated below for Example 3 - Vapor Pressure from the Data Table.

Graphs are prepared by first selecting the independent variable to be placed on the horizontal (X) axis from the drop-down list at the top of the window.  Then one or more dependent variable names, which will be put on the vertical (Y) axis, must be selected.  Note that for selecting more than one variable, press and hold the Cntr key and use the left mouse button to select one or more variables.  Note that once a variable is selected for the (X) axis, it no longer will appear in the (Y) axis drop-down list.

Example - Plotting Vapor Pressure

Select variable "P" for the (X) axis and variables "TC" and "TK" for the (Y) axis for Example 3 - Vapor Pressure from the Data Table (discussed above).  Note that selection of several variables requires pressing and holding the Ctrl key while clicking on the desired variable names.  Also select the "Draw Markers" option and the "Connected" options as shown below.

Press the pink arrow key to have the initial graph displayed.

Scatter Points Graphical Display

The initial graphical display of this Example discussed above is shown below. 

The options available on left side of this graphical display screen are summarized below.  Please click on the description located under "Details" on the right for more information.

Icon	Description	Details
	Refresh: Graph is restored to original state.
	Save: Creates a Polymath Graph file as *.plg
	Save As: Creates a new Polymath Graph file as *.plg
	Open: Opens a Polymath Graph file
	Print:  Prints the current Graph
	Copy: Copies the current Graph to the clipboard
	Curves and Functions: Allows selection of variable for revised Graph	Curves and Functions
	Design: Allows changes in Graph properties	Design
	Table:  Creates data table for selected curves	Table

Curves and Functions

This option allows the displayed curves and functions to be modified.  For the Example, this resulting window is shown below.

The pull-down menu for the "Indep Var:" allows any single variable from the Data Table to be displayed on the (X) axis.  The checked boxes indicate the variables that will be displayed on the (Y) axis.  These changes take place immediately on the Graph once the above window is modified.  The "Label" button allows the name of the highlighted variable to be changed.  The "Hide All" button removes all dependent variables from the (Y) axis, while the "Show all" button displays all the dependent variables with automatic scaling. The "Functions" button allows additional additional functions of only the Independent Variable (use x in generating the function expression).  Functions can also be turned “on” and “off” just like the variables.

Design

This option presents a window that allows the modification of the Graph.  The options as indicated by the taps at the top of the window as shown below are indicated.  These provide the user with the capability to

Table

This option presents a Table of all the variables available to the Graph display. The Table for this Example is as follows.