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python Programming Glossary: invertHow to write Python sort key functions for descending values http://stackoverflow.com/questions/11206884/how-to-write-python-sort-key-functions-for-descending-values fields. But with a key function I need to find some way to invert reverse either the dates or the strings. It's easy although..
Getting SciPy quantiles to match Stata xtile function http://stackoverflow.com/questions/11347539/getting-scipy-quantiles-to-match-stata-xtile-function and searching online the Stata xtile method tries to invert the empirical CDF of the data and uses the equal weighted average..
Jython convert picture to grayscale and then negate it http://stackoverflow.com/questions/17158026/jython-convert-picture-to-grayscale-and-then-negate-it altered grayscale values. thnx python jython grayscale invert jes share improve this question Just to add an artistic.. getBlue px color makeColor level level level And to negate invert simply do level 255 level Which give def greyScaleAndNegate..
Simultaneous record audio from mic and play it back with effect in python http://stackoverflow.com/questions/17711672/simultaneous-record-audio-from-mic-and-play-it-back-with-effect-in-python to be able to edit this array with with functions such as invert clip tile etc. This manipulation of the audio array lets me..
Solving non-linear equations in python http://stackoverflow.com/questions/19542801/solving-non-linear-equations-in-python you know F a b and c at 4 different points and you want to invert for the model parameters X Y and Z. We have 3 unknowns and 4.. of F as well. In python this would translate to def invert f x y z G np.vstack np.ones_like x x y z .T m _ _ _ np.linalg.lstsq.. passing it to curve_fit . In a nutshell def nonlinear_invert f x y z def wrapped_func observation_points a b c x y z observation_points..
http://stackoverflow.com/questions/211160/python-inverse-of-a-matrix programming in pure python. Here is an example of how to invert a matrix and do other matrix manipulation. from numpy import..
What do I use for a max-heap implementation in Python? http://stackoverflow.com/questions/2501457/what-do-i-use-for-a-max-heap-implementation-in-python share improve this question The easiest way is to invert the value of the keys and use heapq. For example turn 1000.0..
In Python, how can I find the index of the first item in a list that is NOT some value? http://stackoverflow.com/questions/2748235/in-python-how-can-i-find-the-index-of-the-first-item-in-a-list-that-is-not-some item in the list that has the value x. Basically I need to invert the index x method. I need to get the index of the first value..
Converting a python numeric expression to LaTeX http://stackoverflow.com/questions/3867028/converting-a-python-numeric-expression-to-latex and ' def visit_Invert self n return ' operatorname invert ' def prec_Invert self n return 800 def visit_Not self n return..
Matplotlib/pyplot: How to enforce axis range? http://stackoverflow.com/questions/4136244/matplotlib-pyplot-how-to-enforce-axis-range or ylim after your plot command. I use this quite a lot to invert the x axis I work in astronomy and we use a magnitude system..
Python reverse / inverse a mapping http://stackoverflow.com/questions/483666/python-reverse-inverse-a-mapping Given a dictionary like so map 'a' 1 'b' 2 How can one invert this map to get inv_map 1 'a' 2 'b' python dictionary mapping..
Javascript equivalent of Python's zip function http://stackoverflow.com/questions/4856717/javascript-equivalent-of-pythons-zip-function you will need to do zip.apply this ... when you want to invert the zip function or if you want to similarly have a variable..
http://stackoverflow.com/questions/8305199/the-tilde-operator-in-python are just different ways of interpreting bytes. It is the invert or complement operation in which all the bits of the input data.. The reified form of the ~ operator is provided as operator.invert . To support this operator in your own class give it an __invert__.. . To support this operator in your own class give it an __invert__ self method. import operator class Foo ... def __invert__..
A data-structure for 1:1 mappings in python? http://stackoverflow.com/questions/863935/a-data-structure-for-11-mappings-in-python x D y y D.inverse x The obvious solution is to simply invert the dictionary every time I want a reverse lookup Inverting..
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