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"PowerSurface: PowerSeries LSqFitting & SawFile" snapshot
PowerSurface offers linear/quadratic/higherpower leastsquare curve/surface fitting for the given columnwise numeric data for a function z = f(x) or z = f(x,y) of one/two independent variable(s). SawFile allows vertical copying/pasting of data.
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Rating
User rating
62% of
users liked this software
Platform:
Windows 7/Vista/XP/2000/95/98
Publisher:
Price:
Freeware
File size:
3.23 Mb
Date added:
December 2, 2007
Screenshot:
Product page:
Description from the Publisher
PowerSurface offers linear/ quadratic/ higherpower leastsquare curve/ surface fitting for the given columnwise numeric data for a function z = f(x) or z = f(x,y) of one or two independent variable(s), so that the fitted function is of the form z = a + b.x + c.x2 +... or z = a + b.x + c.y + d.x2 + e.xy + f.y2 +... respectively. To perform the fitting, the aforesaid algebraic power series function is assumed, and then the sum of the squares of deviations of zvalues (for the given points) from the assumed functionvalue is minimized, thereby generating a set of linear simultaneous equations. This set is then autosolved by standard Gaussianelimination method, giving the fitting parameters (coefficients) a, b, c etc. (users should refer to the tutorials). To avoid calculation errors, constant factors and decimalpoints in the given (x,y,z) data are first shifted but finally recorrected. The SawFile subroutine allows vertical copying/pasting of numeric data columns from text files.
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