Mathematical Solutions.........

Regression analysis

Equation graph plotter

Desktop calculators

Conversion utilities

Generic applications


Independent, non-profitable software & technology developments of Dr. Larry Nylund

Regression Analysis - Graphing - Scientific Calculator - Unit Conversion

Equation graph plotter - EqPlot v1.3.63 

Graphically Review Equations
EqPlot gives engineers and researchers the power to graphically review equations, by putting a large number of equations at their fingertips. The program is also indispensable for students and teachers.

Understandable and convenient interface
A flexible work area lets you type in your equations directly. It is as simple as a regular text editor. Annotate, edit and repeat your graphings in the work area. You can also paste your equations into the editor panel.
Save your work for later use into a text or graphic file. Comprehensive online help is easily accessed within the program.

How to work with the program.

1. First, you must enter formulas into the formula-editors.

You can use next operations (as expression syntax):

Operators: + - * / and ( ) [parentheses]
Built-in Functions... [Unless otherwise indicated, all functions take a single numeric argument, enclosed in parentheses after the name of the function]
Algebraic: Abs, Square, Sqrt, Power(x;z) [= x raised to power of z; Use semicolor as the list-separator]
Transcendental: Exp, Ln [natural], LogBase10, LogBase2, LogBaseN(Base;x)
Trigonometric: Sin, Cos, Tan, Cot, Sec, Csc
Other Trig: ArcSin, ArcCos, ArcTan, ArcCot, ArcSec, ArcCsc, Coversine, Exsecans, Haversine, Versine
Hyperbolic: SinH, CosH, TanH, CotH, SecH, CscH
Other Hyp: ArcSinH, ArcCosH, ArcTanH, ArcCotH, ArcSecH, ArcCscH
Constants:{Mathematical constants}
Pi [= 3.1415926535897932384626433832795] {Pi}
PiOn2 [= 1.5707963267948966192313216916398] {Pi / 2}
PiOn3 [= 1.0471975511965977461542144610932] { Pi / 3}
PiOn4 [= 0.78539816339744830961566084581988] {Pi / 4}
Deg [= 57.295779513082320876798154814114] {180 / Pi}
Bernstein [= 0.2801694990238691330364364912307] {Bernstein constant}
Cbrt2 [= 1.2599210498948731647672106072782] {CubeRoot(2)}
Cbrt3 [= 1.4422495703074083823216383107801] {CubeRoot(3)}
Cbrt10 [= 2.1544346900318837217592935665194] {CubeRoot(10)}
Cbrt100 [= 4.6415888336127788924100763509194] {CubeRoot(100)}
CbrtPi [= 1.4645918875615232630201425272638] {CubeRoot(PI)}
Catalan [= 0.9159655941772190150546035149324] {Catalan constant}
Sqrt2 [= 1.4142135623730950488016887242097] {Sqrt(2)}
Sqrt3 [= 1.7320508075688772935274463415059] {Sqrt(3)}
Sqrt5 [= 2.2360679774997896964091736687313] {Sqrt(5)}
Sqrt10 [= 3.1622776601683793319988935444327] {Sqrt(10)}
SqrtPi [= 1.7724538509055160272981674833411] {Sqrt(Pi)}
Sqrt2Pi [= 2.506628274631000502415765284811] {Sqrt(2 * Pi)}
TwoPi [= 6.283185307179586476925286766559] {2 * Pi}
ThreePi [= 9.4247779607693797153879301498385] {3 * Pi}
Ln2 [= 0.69314718055994530941723212145818] {Ln(2)}
Ln10 [= 2.3025850929940456840179914546844] {Ln(10)}
LnPi [= 1.1447298858494001741434273513531] {Ln(Pi)}
Log2 [= 0.30102999566398119521373889472449] {LogBase10(2)}
Log3 [= 0.47712125471966243729502790325512] {LogBase10(3)}
LogPi [= 0.4971498726941338543512682882909] {LogBase10(Pi)}
LogNConst [= 0.43429448190325182765112891891661] {LogBase10(NConst)}
NConst [= 2.7182818284590452353602874713527] {Natural constant; exp(1)}
hLn2Pi [= 0.91893853320467274178032973640562] {Ln(2*Pi)/2}
inv2Pi [= 0.159154943091895] {0.5 / Pi}
TwoToPower63 [= 9223372036854775808.0] {263}
GoldenMean [= 1.618033988749894848204586834365638] {GoldenMean}
EulerMascheroni [= 0.5772156649015328606065120900824] {Euler GAMMA}
Constants:{Certain physical constants expressed in SI units}
Amu [= 1.6606E-27] {Atomic mass unit constant (kg)}
Avog [= 6.0225E23] {Avogadro constant (mol-1)}
Boltz [= 1.3805E-23] {Boltzmann constant (J K-1)}
ECharge [= 1.602189E-19] {Electron charge (C)}
EMass [= 9.11E-31] {Electron mass (kg)}
EVolt [= 1.602E-14] {Electron volt (J)}
Farad [= 96500] {Faraday constant (C mol-1)}
Gas [= 8.314] {Gas constant (J mol-1 K-1)}
Neutron [= 1.6748E-27] {Neutron mass (kg)}
Planck [= 6.626E-34] {Planck constant (Js)}
Proton [= 1.6725E-27] {Proton mass (kg)}
Light [= 2.9979E8] {Speed of light (m s-1)}
Gravity [= 9.80665] {Gravitational acceleration (m s-2)}
Pressure [= 101325] {Normal atmospheric pressure (N m-2)}
Stefan [= 5.67032E-8] {Stefan-Boltzmann constant (W m-2 K-4)}
Bohr [= 5.2917706E-11] {Bohr radius (m)}

Note: Function and constant names are not case-sensitive. For example, Exp is the same as EXP or exp. The variable, which is the letter "x", is also not case-sensitive.

Note: Up to ten equations could be plotted at the same time, so that intersections and domains could be studied visually.

Note: Text after proper mathematical expression, will be ignored by the compiler. You can use this feature to comment your equation set.

Note: In particular, you cannot use ^ for exponentiation, you must use the Power function instead.

Note: All the algebraic, trigonometric, hyperbolic and transcendental routines map directly to Intel 80387 FPU floating point machine instructions.

Note: As operands you can use numeric constants in any form (2, 2.0, 2e5, 2e-3) with decimal delimiter "period" or "comma", depending on your computer system configuration.

2. Example of formula: (2.0e-3*x) + square(x) + power(x;3) + power(2.55;4) + logbaseN(4;6.25)
Thus! If your computer system configuration uses "comma" as decimal delimiter/separator, 2.55 in the above example must be 2,55
Example of formula: (2,0e-3*x) + square(x) + power(x;3) + power(2,55;4) + logbaseN(4;6,25)

3. Edit-boxes "X min, X max": These are the limits of the drawing.

4. Edit-box "Step": The smaller value it has, the more accurate drawing you get.

5. Click the "Plot" button to perform graphing.

The software presented on these pages are for Save-the-Children charity.

Copyright © 2024 Larry Nylund
Institute of Mathematics and Statistics
Helsinki, Finland
North Europe
All Rights Reserved