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Functions graph

1. Description

The screen "function graph" can represent multiple curves or functions. Typically the ranges of the X-and Y-axis are pre defined by the application. The most interesting area of the function will be shown. If you want to change the range of the X-and Y-axis, call the menu "setting".

2. Use cases

The screen is divided into several areas. In the center is the curved region. There, the curves are shown. Above the curves are the curve labels.

When the user touches the function graph within the plot area, a cursor with the x-and y-coordinate is shown. If several functions are visualized, the cursor will be moved to the the nearest function.

The cursor will be hidden by touching the display outside the plot area (left, right, bottom).

A function graph can be showed or hidden by selecting the function equation at the top of the screen. This is useful when multiple functions are visualized.

The colors of the curves are fixed. You can not currently be changed.

The range of X and Y axis can be changed via the "Settings" menu.

3. Settings

The following settings can be changed:

3.1 x-Min.

Value for the lower region of the X-axis.

3.2 x-Max.

Value for the upper region of the X-axis.

3.2 Automatic calculation of y-Min. and y-max.

If the checkbox is selected, the Y-axis is scaled automatically. This means that all the functions is determined by the maximum and minimum Y value. Depending on these values, the limits of the Y-axis can be calculated.

If the checkpox is not selected, the Y-axis scale is not automatically.

3.2 y-Min.

Value for the lower region of the Y-axis. If the Y-axis is automatically scaled, the value is ignored.

3.2 y-Max.

Value for the upper region of the X-axis. If the Y-axis is automatically scaled, the value is ignored.

3.2 Number of points

Each curve shown consists of points, which is connected by a line. The number of points of a curve can be set here.

The more points you claim, the more accurate the curve. However, the calculation takes longer.

The number of points you should not choose larger, as the width of the display in pixels. By default 100 points are given.