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Psion Database
|
1994-05-29
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3KB
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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]