TriLookup

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. The functions can also handle tables containing missing and invalid data. Includes functions to fit polynomial curves through a set of X-Y data points and return a table of polynomial curve coefficients, as well as, determine the best fit polynomial curve. In case of an error, TriLookup functions can either return a standard Excel error code or a detailed text error message, indicating the nature of the error and pointing to the cause of it. Includes online help and example workbooks. Requires Microsoft Excel (32 Bit) 97, 2000, XP, 2003, 2007 or 2010 (Windows) or Excel 98, 2001 or X (Mac). TVLOOKUP & TVLKP search a multi column table for the lookup value in the lookup column and return a value from the same row of the return column. Can use interpolation and handle missing values. THLOOKUP & THLKP search a multi row table for the lookup value in the lookup row and return a value from the same column of the return row. Can use interpolation and handle missing values. T2LOOKUP & T2LKP search a 2D (X-Y) table for X values in top row and Y values in left column, and return a value from the intersecting row and column. Can use interpolation and handle missing values. T3LOOKUP & T3LKP search a 3D (X-Y-Z) table for X, Y and Z values. Return a value V(x,y,z) from the intersecting row, column and table. Can use interpolation and handle missing values. TVPOLYDATA & THPOLYDATA Calculate polynomial curve coefficients up to a specified order (using the least squares method) for the X-Y data points given in a table. Also determine the best fit curve. TPOLY returns the Y value of a polynomial curve for given a X value, polynomial order and an array of polynomial curve coefficients. It can optionally return the value of a derivative.

Minimum requirements: Excel 97, 2000, XP, 2003, 2007 or 2010

Operating system: Win2000,Win7 x32,Win7 x64,Win98,WinVista,WinVista x64,WinXP

Program URL: http://www.trimill.com/TriLookup/TriLookup.htm

You are allowed to copy this Shareware version (and ONLY the Shareware version) and give it to any other person, as long as it is not modified in any way. Under modifications is understood the changing, adding or removing of any files of this package without a written permission from Trimill. You are NOT allowed to pack this program together with a commercial program or a book. Shareware dealers are allowed to sell the Shareware version for a small fee, but it must be clear to the buyer that he/she isn't receiving the full version! The distribution on CD-ROM is also permitted, as long as the original files are not changed in any way. Please contact Trimill if you want to distribute the program with a different installation program, changed files etc.

TriLookup Software License YOUR AGREEMENT TO THIS LICENSE You should carefully read the following terms and conditions before using, installing or distributing this software. Unless you have a different license agreement signed by Trimill Industrial Systems Inc. ("Trimill") your use, distribution, or installation of TriLookup indicates your acceptance of this agreement ("License").

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