HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 62

hp40g+.book Page 20 Friday, December 9, 2005 1:03 AM "Build Your Own" menu keys Key CLEAR Meaning Puts the highlighted independent value (X, T, θ, or N) into the edit line. Pressing replaces this variable with its current value. Inserts a zero value at the position of the highlight. Replace a zero by typing the number you want and pressing . Sorts the independent variable values into ascending or descending order. Press and select the ascending or descending option from the menu, and press . Toggles between two character sizes. Displays the defining function expression for the highlighted column. Deletes the highlighted row. Clears all data from the table. Example: plotting a circle Plot the circle, x 2+ y 2 = 9. First rearrange it to read y = ± 9 - x2 . To plot both the positive and negative y values, you need to define two equations as follows: y = 9 - x2 and y = - 9 - x2 1. In the Function aplet, specify the functions. 2-20 Aplets and their views