67 lines
2.3 KiB
Markdown
67 lines
2.3 KiB
Markdown
# Plotter
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## Application to plot functions in python 3.
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### Info
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An application to plot a function (points, piecewise or normal) using turtle graphics.
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The application is structured in two modules: "graph.py" contains classes and functions for drawing while "plotter.py" is the GUI (tkinter) module that facilitates and speeds up the use.
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graph.py is independent and can be used even without the graphical interface.
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You can save the plot in svg format via [canvas2svg] (Link: http://wm.ite.pl/proj/canvas2svg/index.html).
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### Instructions
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**graph.py**:
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* Import the module graph.py.
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`import graph`
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* Create a Cartesian plane instantiate an object "graph" by providing the lengths of the axes.
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`plane = graph.graph(20,20)`
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* Draw a function using the method draws providing a function, the interval in the domain, and color.
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`plane.plot (lambda x: x**2-2*x+1, -10, 10, "#92182b")`
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* Clean the graph.
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`plane.clean()`
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`Graph()` is subclass of turtle.Pen so you can use all the methods inherited.
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**plotter.py**:
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**Normal**:
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* Enter the function in the first text box. Between the variable and the coefficients a * is not necessary.
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Use `^` for exponentiation and `|` for the absolute value |f(x)|.
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`eg |cos(x)*1/2x|`
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* Enter the range of the function to print in the second box.
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`eg -10, 10`
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* Enter the color in the third box. A string with the name of the color, a tuple that contains RGB numbers, #RGB color in hex.
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`eg #a1a1a1`
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**Points**:
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* Insert the points of the function into a tuple of the form (x1, y2), (x2, y2).
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`eg (0,0), (1,2), (2,4), (3,-3)`
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* Enter the range of the function to print the second box.
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`eg -10,10`
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* Enter the color in the third box. A string with the name of the color, a tuple that contains RGB numbers, #RGB color in hex.
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`eg #a1a1a1`
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**Piecewise**:
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* Enter the traits in a tuple type [f1(x), (range)], [f2(x), (range)].
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`eg [(-x), (-100,0)], [(x), (0,100)]`
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* Enter the range of the function to print the second box.
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`eg -10.10`
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* Enter the color in the third box. A string with the name of the color, a tuple that contains RGB numbers or #RGB color in hex.
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`eg #a1a1a1`
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You can use all the functions and constants defined in `math` module.
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### License
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Dual licensed under the MIT and GPL licenses:
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http://www.opensource.org/licenses/mit-license.php
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http://www.gnu.org/licenses/gpl.html
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