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Excel Hyperbolic Decline
TriLookup 2.2
Excel add-in with eleven powerful worksheet functions for 1, 2 and 3 variable lookup and interpolation. Interpolation modes include: closest-value, linear, piecewise parabolic or hyperbolic, cubic spline and polynomial up to 20th order. Handles tables with missing data. Fits polynomial curves through a set of X-Y points, returns table of polynomial coefficients and finds the best fit curve. Includes online help and examples for Windows and Mac.
Released: 2006-01-22
License: $20.00
Publisher: Trimill Industrial Systems Inc.
Language: English
Platform: Windows
Requirements: Excel 97, 2000, XP or 2003
Install: Install and Uninstall

Lacks piecewise regression I need something that performs piecewise regression, but this is not available in this package.

Solved my problem in an instant! Great for doing steam table lookups.

TriLookup Mac 2.2
Excel add-in with eleven powerful worksheet functions for 1, 2 and 3 variable lookup and interpolation. Interpolation modes include: closest-value, linear, piecewise parabolic or hyperbolic, cubic spline and polynomial up to 20th order. Handles tables with missing data. Fits polynomial curves through a set of X-Y points, returns table of polynomial coefficients and finds the best fit curve. Includes online help and examples for Windows and Mac.
Released: 2006-01-22
License: $20.00
Publisher: Trimill Industrial Systems Inc.
Language: English
Platform: MAC
Requirements: Excel 98, 2001 or X
Install: Uninstall Only
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