
Mathematical
Solutions......... 


Regression analysis 

Equation graph plotter 

Desktop calculators 


Conversion utilities 

Generic applications 








Independent, nonprofitable software & technology developments of Dr. Larry Nylund
Regression Analysis  Graphing  Scientific Calculator  Unit Conversion 
Multivariable calculator  SimplexCalc v4.1.58 

Get solution for a mathematical expression quickly
SimplexCalc is a multivariable desktop calculator for Windows. It can be used as an enhanced elementary, scientific, financial or expression calculator.
In addition to arithmetic operation, more than hundred builtin constants and functions can also be used in your expression.
SimplexCalc also has the unlimited ability to extend itself by using custom (userdefined) variables. You can add your own variables to SimplexCalc in order to tackle complex problems with ease and fun. Even you can compile formula once and then calculate the result many times with different variable values.
Simple and userfriendly interface
SimplexCalc is small and simple to use but with much power and versatility underneath. Features include:
 Scientific calculations and unlimited expression length
 Unlimited customizable variables
 Parenthesis compatible and unlimited nesting for expression
 Upper case and lower case can be freely used in expression
 History of calculation sessions
 You can do standard manipulation with "expression" editpanel such as cut, copy and paste operations
For example in finance, the mortgage formula for calculating Fixed Monthly Payment P is expressed as:
P = L[c(1 + c)^n]/[(1 + c)^n  1]
This formula is used to calculate the fixed monthly payment (P) required to fully amortize a loan of L dollars over a term
of n months at a monthly interest rate of c. [If the quoted rate is 6%, for example, c is 0.06/12 or 0.005].
Formula: L*(((c/100)/12)*power((1+((c/100)/12));n))/(power((1+((c/100)/12));n)1)
Assigning variables: L;c;n
Multipurpose calculator  MultiplexCalc v5.4.59 

Solve mathematical expression at high speed
MultiplexCalc is a multipurpose and comprehensive desktop calculator for Windows. It contains more than 100 mathematical functions and constants to satisfy your needs to solve problems ranging from simple elementary algebra to complex equations. Its underling implementation encompasses high precision, sturdiness and multifunctionality.
MultiplexCalc also has the unlimited ability to extend itself by using userdefined variables. You can add your own variables to MultiplexCalc in order to convenience your work. Any instance of a formula can be parsed once, and calculated many times with different variable values.
Features include:
 Ease of use
 Unlimited number of variable definitions
 Scientific calculations and unlimited expression length
 Parenthesis compatible and unlimited nesting for expression
 Both expression editing and buttonclicking functionality
 Clipboard smart functionality (cut, copy and paste operations)
For example in finance, a general equation for calculating Future Value of Money is expressed as:
FV_{n} = P * (1 + k/m)^{(m*n)}
Where:
P is the initial principal, or present value (denoted as: principal)
k is the annual rate of interest (denoted as: rate)
n is the number of periods  typically years  over which money earns a return (denoted as: years)
m is the number of times per year interest is compounded (denoted as: compounding_times)
Formula: principal*power((1+rate/compouding_times);(compounding_times*years))
Assigning variables: principal;rate;years;compounding_times
Compact calculator  CompactCalc v4.2.54 

Solve algebraic, linear and nonlinear equations
CompactCalc is an enhanced scientific calculator for Windows with an expression editor. It embodies generic floatingpoint routines, hyperbolic and transcendental routines. With the brilliant designs and powerful features of CompactCalc, you can bring spectacular results to your calculating routines.
CompactCalc features include the following:
 You can build linear, polynomial and nonlinear equation set
 Scientific calculations and unlimited expression length
 Parenthesis compatible and unlimited nesting for expression
 High precision calculation  features up to 38 digits after the decimal point
 Accurate result display  features up to 24 digits after the decimal point
 Calculation range (1.79E308, 2.22E308)
 Comprehensive documentation
 Possibility to enter mathematical formulas as with a keyboard as with buttonpanel
 CompactCalc has almost hundred of physical constants and math formula built in, which can be easily accessed and used in calculations. No longer do you have to search the physic textbook for that common formula or physical constant data.
Nonlinear regression analysis  DataFitting v1.7.68 

Quickly Find the Best Equations
that Describe Your Data
DataFitting gives engineers and researchers the power
to find the ideal model for even the most complex data, by putting a large number of
equations at their fingertips. DataFitting's builtin library includes
a wide array of linear and nonlinear models from
simple linear equations to high order polynomials. DataFitting has the following capabilities:
 A 38digit precision math emulator for properly fitting high order polynomials and
rationals.
 A robust fitting capability for nonlinear fitting that effectively copes with outliers
and a wide dynamic Y data range.
Graphically Review Curve Fit Results
Once your data have been fit, DataFitting automatically sorts and plots the fitted equations
by the statistical criteria of Standard Error. You can preview your graph and output
publicationquality graphs in several different configurations. A residual graph
as well as parameter output is generated for the selected fitted equation. Data,
statistical and numeric summaries are also available from within the reportpanel.
Innovative Calculator  InnoCalculator v1.1.61 

The software presented on these pages are for SavetheChildren charity.
Copyright © 2024 Larry Nylund Institute of Mathematics and Statistics Helsinki, Finland North Europe All Rights Reserved
 
