home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Archive Magazine 1995
/
ARCHIVE95.iso
/
discs
/
shareware
/
share_49
/
best_fit
/
!GL_Fit
/
!help
next >
Wrap
Text File
|
1992-02-21
|
2KB
|
54 lines
!help for !GL_Fit version 1.01
A linear data fitter. This program calculates the best linear fit
of a set of (orthogonal) functions to your data.
USAGE:
~~~~~
-Drop a data/text/CSV file (2 or 3 columns of numbers) on the baricon.
col. 1: represents your 'x' data
col. 2: 'y' data
col. 3: represents an (estimated) error in your 'y' value. [optional]
-Select the desired order from the menu (this affects the accuracy or number
of terms of your fit function).
N.B.: the highest order you can select depends on the number of data points
you've dropped.
-Select the desired fit-function from the submenu 'bases'.
-Click 'GO'
N.B.. Use the adjust button to keep your menu's on screen.
RESULTS:
~~~~~~~
Covariance-matrix or coefficients (parameters) may be saved from the menu as
a text-file. A very nice feature is the generating of a curve with the
'CurveGen' entry. This will save a sequence of x and f(x) numbers which is
in fact represents your fit. You may set the system variable "GL_Fit$GenN" to
a number >2 to set the number of generated coefficients (default 100). You
may however scan through the results directly by using the dialog-boxes
from the menu.
N.B.. Element[i][i] on the diagonal of the covariance matrix gives the
squared error of parameter i.
BUGS:
~~~~
This program was actually written on a hot summer night, so there must be a
lot of bugs in it. Have You found some ..., please send a complete description
to me. To be honest, I never planned it as a PD-piece of software, but any
suggestions to make it more useful are very welcome.
My address is:
Paul F.C. Groot.
AreStraat 46,
1445 EK, Purmerend.
Holland.