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Psion Database | 1994-05-29 | 3.4 KB | 76 lines |
- OPLDatabaseFile
- Gplot
- Plotting Functions
- Integrating Functions
- Solution of Functions
- Graphing Functions
- Tracing Graphs
- Data Analysis
- Editing
- About Gplot V2.0a
- Credits7
- W 4Any function that may be evaluated by "Calc" can be 4
- W 1plotted. Valid variables are any of X,x,Y,y,Q,q.<
- W 9If the function is undefined at any point (i.e. tends to .
- W +infinity) you will be prompted for a value.9
- } 6The integration uses Simpsons rule. This approximates>
- } ;the function to a parabola through 3 equally spaced points.?
- } <It's accuaracy is of the order of the 4th derivative of the '
- } $function multiplied by (step**5)/90.6
- u 3This uses the Newton-Raphson method of solution of >
- u ;equations. The starting point for the solution needs to be8
- u 5carefully chosen to be close to the desired solution.7
- u 4This can be estimated using the Trace graph function<
- x 9Three graphs are provided, one Full screen graph and two 8
- x 5smaller 1/2 screen graphs. These can be selectively 9
- x 6displayed and hidden using the Show and Hide functions
- "Tab" will hide all windows6
- 3The Trace graphs option allows a cursor to be moved9
- 6around the graph. The arrow keys move the cursor one >
- ;pixel, Control+Arrow moves the cursor 5 pixels. Caps Lock:
- 7will allow the cursor to move freely around the screen.9
- 6Psion+Z and Shift+Psion+Z zoom in and out, centered on<
- 9the cursor. Enter will recenter the graph on the cursor.2
- /Space flips the Co-ordinate window. Esc quits.;
- 8Points may be entered, deleted, and modified using Edit.
- ?Plot plots points in the current file on a specifed graph. The7
- 4Graph will be cleared and resized to fit the points.
- ?Linear Fits a line to the points in the current data file. TheA
- >results are then displayed and the option to plot the line on
- any graph is given.
- 9Modify allows you to operate a function on a set of data @
- =points. The function can be any function that can be plotted?
- <There is a special case, if the function to operate on the X>
- ;range is given as Y then the ranges X and Y will be swapped9
- 6Points may be entered, deleted and changed through one6
- 3of three methods, either by using the dialogs under4
- 1the Edit (Psion+E) option or by highlighting the 3
- 0line to change in Display (Psion+D) and pressing2
- /Enter to change or Delete to delete that point.
- 7Bring and Export may be used to transfer points between)
- &Gplot and the spreadsheet for editing.
- <There is an option under Edit to erase all points in a file.<
- '9Gplot was written to provide the Psion Series 3a with the=
- ':functionality of a graphical calculator and the ability to
- analyse experimental data.#
- ' It was first released in Feb '93(
- '%This version was released on 94/05/12
- '<Gplot is shareware, if you use it beyond a 14 day evaluation@
- '=period you should register it. Registration costs
- 15 or $25<
- '9Registration can be done either on CompuServe through the9
- '6GO SWREG service or by sending the Registration fee to
- M.C.Millar
- 28 Water End
- Clifton
- YO3 6LP
- United Kingdom
- Cheques payable to M.C.Millar
- Thanks for inspiration go to:
- The Oxford Physics Course>
- ;Nik McDonald, all my beta testers, Tom Dolbilin, David Wood
- and all at Psion.
- Matt Millar
- [millar@cix.compulink.co.uk]
- [Compuserve 100021,3354]
-