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Formula calculator Charts and Graphs

The formula calculator chart is designed to automatically display your graph data quickly. However, you can change most of these settings using the Chart properties window. This provides the main interface for selecting which graphs to display, setting the chart scales and the graph types (linear, logarithmic or polar charts). It is used to set the graph line types (solid or dashed), the line colours and for displaying the data points.

How your graphs are displayed can be set in a number of ways. You can use the buttons on the toolbar, the menu items under Tools>chart or show the context menu by right clicking your mouse while in the graph window.

To create a graph you need to pass to Formula Calculator a set of x-y pairs. Use the range function to create an array of x values, such as x=range(0,10,0.1) or x=[0,10,0.1]. This creates an array of numbers starting from 0 and finishing at 10, in increments of 0.1, which are stored with parameter name x. You then use this parameter (x) in a function or arithmetic expression. The result will also be an array. For example, y=x*x-3 returns in y an array of values, each corresponding to one of the x values. To plot y against x, simply include plot(x,y) in the input text field. When the calculator is run, it plots the graph. You can include multiple arrays in the plot statement, such as plot(x,2*x^2,3*x^3) which creates two graphs on the one chart window.

Information on how to format your graphs or read information from them are given in the links below.

Displaying data and formatting graphs

Saving or exporting charts and data arrays