HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 428

BOX This command is used to draw a box in the graph. Move the cursor to a clear area of the graph, and press @BOX@. This highlights the cursor. Move the cursor with the arrow keys to a point away, and in a diagonal direction, from the current cursor position. Press @BOX@ again. A rectangle is drawn whose diagonal joins the initial and ending cursor positions. The initial position of the box is still marked with and x. Moving the cursor to another position and pressing @BOX@ will generate a new box containing the initial point. To deselect BOX, move the cursor to the original point where BOX was activated, then press @LINE @LINE. CIRCL This command produces a circle. Mark the center of the circle with a MARK command, then move the cursor to a point that will be part of the periphery of the circle, and press @CIRCL. To deactivate CIRCL, return the cursor to the MARK position and press @LINE. Try this command by moving the cursor to a clear part of the graph, press @MARK. Move the cursor to another point, then press @CIRCL. A circle centered at the MARK, and passing through the last point will be drawn. LABEL Pressing @LABEL places the labels in the x- and y-axes of the current plot. This feature has been used extensively through this chapter. DEL This command is used to remove parts of the graph between two MARK positions. Move the cursor to a point in the graph, and press @MARK. Move the cursor to a different point, press @MARK again. Then, press @@DEL@. The section of the graph boxed between the two marks will be deleted. Page 12-47