sys27 / xfunc

xFunc provides a powerful parser and analyzer for mathematical expressions. It excels at calculating derivatives, simplifying expressions, and achieving high performance.

Hello there

• ⚙️ My name is Dmytro Kyshchenko. I'm a senior software engineer
• 🤟 I daily use .NET, C#, Docker, terminal.
• 🌱 I’m currently learning DevOps, Azure
• 💬 Ask me about .NET, C#, ASP.NET, Docker, software design, development
• 📫 How to reach me: LinkedIn
• 📜 Visit my blog
• 😄 Pronouns: He/Him

xfunc's Issues

Add the simplify function.

Example:

simplify(2x+ 4*3 - 1/(9-2^3)) = 2x + 12 - 1

Unit Converter

Bug in the Equals method.

var sine = new Sin(new Number(2));
var ln = new Ln(new Number(2));

sine.Equals(ln) == true

And

var add = new Add(new Number(2), new Number(3));
var sub = new Sub(new Number(2), new Number(3));

add.Equals(sub) == true

Add buttons for hyperbolic functions.

Greatest common factor and least common multiple

gcf(12, 16) = 4
lcm(12, 16) = 48

Wrong rendering of graphs.

Incorrect rendering of the graph

The equation solving.

Add the def function.

Example:

def(x, 10) equals x := 10
def(f(x), x_sin(x)) equals f(x) := x_sin(x)

Create projects for .Net Framework 4.5.1

Add buttons (to right toolbar) for logic expressions.

And add a auto switch toolbars (maths/logics)

Add bitwise operations.

Add not, and, or, xor.

Domain of functions.

Add XML Documentation.

Numbers with dynamic size.

Create a separate project that allows use large numbers (integer and real). Implement +, -, *, /, % and math functions, casting from base types.

Add the About view.

Copy from the 1.4.1.0 version.

Add arsh(x), arch(x), arth(x), arcth(x), arsch(x).

Options for сonverting to different number systems

The IMathExpression class and the Derivative method using the same references to expressions.

Create a solution for .NET 2.0/3.0/3.5/4.5/Portable

Create a parameter collection with read-only variables (constants).

Plotting graphs on the same canvas.

Add ability to create user-defined functions.

Input: f(x) = sin(x) or f(x, y, z) = ...
Use: f(2) or f(1, 2, 3)

Add Settings

Functions with different number of parameters.

Example:
gcd(8, 12), gcd(8, 12, 16)

Add hyperbolic functions

Add sinh, cosh, tanh, coth, sech, csch, arsinh, arcosh, artanh, arcoth, arsech, arcsch.

Bitwise operations with variables.

x or x => x * and x

Add ability to enter multiple expressions.

x := 1; sin(x)

Double clicking sets a graph canvas to default size and position.

Wrong size of slider on Windows 8.

Implement Differentiate methods in UserFunction.

Incorrect definition of the cursor position.

The cursor position is defined relative to top-left corner of the screen.

Add the index of expression to the DataTemplate (Math/Logic).

Add an overridden Calculate method that hasn't parameters.

double Calculate();

Use this method if your expression hasn't variables.

Integral

Issue with Differential(IMathExpression..)

Hello,

i found an Issue in the Differential-Method.
The Function don't uses the current AngleMeasurement-Value of the MathParser.
Instead it creates a new MathExpression with the AngleMeasurement.Degree - Value.

In my Project, i only calculate with Radians and I solved the Issue by replacing the AngleMeasurement to Radians in the Default MathParser-Constructor. But this is only a solution for me, its not clean and should be fixed.

bye

Original: https://xfunc.codeplex.com/workitem/10500

Add matrices.

Syntax:
{1, 2, 3, 4, 5, 6}
or
{ {1, 1}, {2, 2}, {3, 3} }
or
{1+1, 2^6, sqrt(3), ln(21)}

Add hex, bin, oct numbers.

Override the Equals method for all expression classes.

It's needed to improve the simplification.

Add the list of graphs to the "Graphs" tab.

Change output directories.

Create controls for watching variables and functions.

Remove the PlotMathExpression class.

The cube root of a negative number

Input: root(-8, 3)

Output (wrong): NaN
Output (right): -2

Add a truth table for logics.

Copy the code from 1.4.1.0 version.

Checking for updates.

Bug in Differentiate in the Log class.

Differentation bug.

Input: deriv(((x + 3)^2) / 16, x)

Output (wrong): 8 * (x + 3)

Output (right): (x + 3) / 8

Change the order of "log" parameters.

MathML support.

We should implement new lexer.