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numpy: most efficient frequency counts for unique values in an array
...x = np.array([1,1,1,2,2,2,5,25,1,1])
y = np.bincount(x)
ii = np.nonzero(y)[0]
And then:
zip(ii,y[ii])
# [(1, 5), (2, 3), (5, 1), (25, 1)]
or:
np.vstack((ii,y[ii])).T
# array([[ 1, 5],
[ 2, 3],
[ 5, 1],
[25, 1]])
or however you want to combine the counts and th...
Using 'return' in a Ruby block
...
170
Simply use next in this context:
$ irb
irb(main):001:0> def thing(*args, &block)
irb(mai...
Best approach for designing F# libraries for use from both F# and C#
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40
Daniel already explained how to define a C#-friendly version of the F# function that you wrote, ...
warning about too many open figures
...ix, ax = plt.subplots(...) , I get the warning RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (matplotlib.pyplot.figure) are retained until explicitly closed and may consume too much memory.
...
What GRANT USAGE ON SCHEMA exactly do?
... |
edited May 3 '19 at 17:05
J_H
8,40911 gold badge1414 silver badges2929 bronze badges
answered Jun 27 ...
Add regression line equation and R^2 on graph
...
+100
Here is one solution
# GET EQUATION AND R-SQUARED AS STRING
# SOURCE: https://groups.google.com/forum/#!topic/ggplot2/1TgH-kG5XMA
l...
In SQL, how can you “group by” in ranges?
...
Neither of the highest voted answers are correct on SQL Server 2000. Perhaps they were using a different version.
Here are the correct versions of both of them on SQL Server 2000.
select t.range as [score range], count(*) as [number of occurences]
from (
select case
when score bet...
What is “rvalue reference for *this”?
...t;
t.f(); // lvalue
test().f(); // rvalue
}
Output:
$ clang++ -std=c++0x -stdlib=libc++ -Wall -pedantic t.cpp
$ ./a.out
lvalue object
rvalue object
The whole thing is done to allow you to take advantage of the fact when the object the function is called on is an rvalue (unnamed temporary, for ...
Create a hexadecimal colour based on a string with JavaScript
...ingle word) and from that somehow generate a hexadecimal value between #000000 and #FFFFFF , so I can use it as a colour for a HTML element.
...
Resize image proportionally with CSS? [duplicate]
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To resize the image proportionally using CSS:
img.resize {
width:540px; /* you can use % */
height: auto;
}
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