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Finding local maxima/minima with Numpy in a 1D numpy array
Can you suggest a module function from numpy/scipy that can find local maxima/minima in a 1D numpy array? Obviously the simplest approach ever is to have a look at the nearest neighbours, but I would like to have an accepted solution that is part of the numpy distro.
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How to get the first column of a pandas DataFrame as a Series?
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>>> import pandas as pd
>>> df = pd.DataFrame({'x' : [1, 2, 3, 4], 'y' : [4, 5, 6, 7]})
>>> df
x y
0 1 4
1 2 5
2 3 6
3 4 7
>>> s = df.ix[:,0]
>>> type(s)
<class 'pandas.core.series.Series'>
>>>
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Draw on HTML5 Canvas using a mouse
I want to draw on a HTML Canvas using a mouse (for example, draw a signature, draw a name, ...)
13 Answers
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How to determine whether an object has a given property in JavaScript
How can I determine whether an object x has a defined property y , regardless of the value of x.y ?
7 Answers
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Application auto build versioning
...nk) has an option to set the value of an uninitialised string variable:
-X importpath.name=value
Set the value of the string variable in importpath named name to
value.
Note that before Go 1.5 this option took two separate arguments.
Now it takes one argument split on the firs...
C# LINQ find duplicates in List
...lement in the group. In LINQ, this translates to:
var query = lst.GroupBy(x => x)
.Where(g => g.Count() > 1)
.Select(y => y.Key)
.ToList();
If you want to know how many times the elements are repeated, you can use:
var query = lst.GroupBy(x =...
What's the correct way to sort Python `import x` and `from x import y` statements?
...stack.org/developer/hacking/
http://developer.plone.org/reference_manuals/external/plone.api/contribute/conventions.html#grouping-and-sorting
PS: the isort utility automatically sorts your imports.
share
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Rolling median algorithm in C
...lues, then perform a binary search to insert the new value and remove the existing one at each iteration.
12 Answers
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How can I remove the decimal part from JavaScript number?
...n the meantime.
Another method of truncating the fractional portion with excellent platform support is by using a bitwise operator (.e.g |0). The side-effect of using a bitwise operator on a number is it will treat its operand as a signed 32bit integer, therefore removing the fractional component. ...
python capitalize first letter only
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@Jan-PhilipGehrcke that is an exercise for the reader. You can see in that case, s is never empty, it is always '123sa' :D
– Ali Afshar
Sep 13 '12 at 16:02
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