CoolGraphing

Is a set of python program to graph curves and make lineal algebra

I made this programs just for fun, If they are usefull to you, use them freely. I know I lack a lot of documentation and comments but if people really use my program I'll add them.

The Programs Icluded are

• Zelle's graphing library (This is not mine nor to powerfull but really simple)
  • Grapher/graphics.py
• Vector and Matrix Classes for operations (This are mine but feel free to change the interface to use numpy or something you like)
  • LinearAlgebra/matrix.py and LinearAlgebra/vectors.py
• Grapher Class wich is a cartesian plane for graphing
  • Grapher/grapher.py
• Least Square program where you can graph any function that passes near a cetain set of points
  • Grapher/leastSquares.py

How to use them

• To use learn how to use Zelle's graphing library go to http://anh.cs.luc.edu/python/hands-on/3.1/handsonHtml/graphics.html

• I made a mess making matrices that are made of vectors, anyway the interface is simple

  • To make a matrix: Matrix([ [a],[b], [c] ]) # matrix are made up from a list of list, and each small list is a row
  • to make a vector: Vector([a, b ,c]) # is a list of the individual values

• To make a catesian plane use the Class:

  • Plane((450,450)) # the parameter is a Touple pointing the center.
  • There are a lot of options to make a Plane that I do not explain here but If you need to know please email me [email protected].

• To make use of Least Squares

  • LeastSquare(setOfPoints, functions)

    • The setOfPoints is a list of touples ex: points = [(1,0),(10,50),(40,50),(200,50),(2,2),(400,400),(-120,-56)]

    • The function are pass as a string in python format ex: """ Polinoms: "def f(x): return %$4$*x4% + %$3$*x3% + %$2$*x**2% + %$1$*x% + %$0$%"

        Exponentials
            def f(x):
                return %$0$*math.exp(x/100)% + %$1$% ## check for the x/100
      
        Logarithms:
            def f(x):
                if x > 0:
                    return %$0$*math.log(x)% + %$1$%
                return 0
      
                roots:
        sqaure Root
            def f(x):
                if x >= 0:
                    return %$0$*x**(1/2)% + %$1$%
            return 0
      

      """