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        "description": "BPF4\n====\n\nAbout\n-----\n\nbpf4 is a library for curve fitting and break point functions in python. It is mainly programmed in Cython for efficiency. It has been used in itself for functional and numerical analysis.\n\nExample\n-------\n\nFind the intersection between two curves\n\n    >>> from bpf4 import bpf  # this imports the api\n    >>> import pylab\n    >>> a = bpf.spline((0, 0), (1, 5), (2, 3), (5, 10))  # each point (x, y)\n    >>> b = bpf.expon((0, -10), (2,15), (5, 3), exp=3)\n    >>> a.plot() # uses matplotlib\n    >>> b.plot() \n    >>> zeros = (a - b).zeros()\n    >>> pylab.plot(zeros, a.map(zeros), 'o')\n\n   \n![1](https://github.com/gesellkammer/bpf4/raw/master/pics/zeros.png)\n\nFeatures\n--------\n\nMany interpolation types besides linear:\n\n* spline\n* half-cosine\n* exponential\n* fibonacci\n* exponantial half-cosine\n* pchip\n* logarithmic\n* etc. \n\nInterpolation types can be mixed, so that each segment has a different interpolation (with the exception of spline interpolation)  \nCurves can be combined non-destructively. Following from the example above.  \n\n    >>> c = (a + b).sin().abs()\n    >>> c[1.5:4].plot()  # plot only the range (1.5, 4)\n\n![2](https://github.com/gesellkammer/bpf4/raw/master/pics/sinabs.png)\n\nSyntax support for shifting, scaling and slicing a bpf\n\n    >>> a >> 2        # a shifted to the right\n    >>> (a * 5) ^ 2   # scale the x coord by 2, scale the y coord by 5\n    >>> a[2:2.5]      # slice only a portion of the bpf\n    >>> a[::0.01]     # sample the bpf with an interval of 0.01\n\nDerivation and Integration: `c.derivative().plot()` or `c.integrated().integrated().plot()`  \nNumerical integration: `c.integrate_between(2, 4)`  \n\nDependencies\n------------\n\n* cython >= 0.19 \n* numpy\n\nInstallation\n------------\n\nTo install the latest version (recommended)\n\n    $> git clone https://github.com/gesellkammer/bpf4.git\n    $> cd bpf4\n    $> python setup.py install\n\nOtherwise, via pip or easy_install\n\n    $> pip install bpf4\n",
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