Sharp EL-9900 operation manual Basic Graphing Features Basic Keyboard

Chapter 4: Basic Graphing Features — Basic Keyboard

U: Press this button to trace the graph drawn on the screen, to obtain the X-Y coordinates:

1.While the graph is displayed, press the Ukey. The cursor appears, flashing on the graph line, with the present X-Y coordinates.

2.Trace the graph using the ;or 'keys. The ;key decreases the value of x, while the 'key increases it.

3.Pressing the Ukey again will redraw the graph, with the cursor at the center of the screen. If the cursor is moved beyond the range of the screen, pressing the Ukey will redraw the screen centered around the cursor.

4.When done, press the Ckey to escape the tracing function.

If more than one graph is displayed on the screen, use the { or }keys to switch the cursor from one graph to the other.

Note: If the Ukey is not activated, the cursor will not be bound to the graph. Pressing the ;, ', {, or }keys will position the free-moving flashing cursor on the graph display.

W: Displays the graph window setup. The setup values — the minimum/maximum X/Y values, and X/Y-axis scale — can be changed manually:

1.While the graph is displayed on the screen, press the

Wkey. The following window appears, with the cursor set at “Xmin=”.

2.The required X-minimum value can be entered here. This limits the left boundary of the graph window. For example, if “Xmin=” is set to “0”, then the portion of the graph’s Y-axis to the left will not be displayed.

3.Once the “Xmin=” value is entered (“0”, for example), press

E. The left limit of the graph is now set, and the cursor moves to “Xmax=”.

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