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How do you get the magnitude of a vector in Numpy?
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The function you're after is numpy.linalg.norm. (I reckon it should be in base numpy as a prop...
How to pass optional arguments to a method in C++?
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edited May 25 '18 at 10:44
AustinWBryan
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What's the difference between lists and tuples?
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20 Answers
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Active
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Repeat each row of data.frame the number of times specified in a column
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Here's one solution:
df.expanded <- df[rep(row.names(df), df$freq), 1:2]
Result:
var1 var2
1 a d
2 b e
2.1 b e
3 c f
3.1 c f
3.2 c f
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im...
py2exe - generate single executable file
I thought I heard that py2exe was able to do this, but I never figured it out. Has anyone successfully done this? Can I see your setup.py file, and what command line options you used?
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Deleting lines from one file which are in another file
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grep -v -x -f f2 f1 should do the trick.
Explanation:
-v to select non-matching lines
-x to match whole lines only
-f f2 to get patterns from f2
One can instead use grep -F or fgrep to match fixed strings from f2 rather than patterns (...
Working with huge files in VIM
I tried opening a huge (~2GB) file in VIM but it choked. I don't actually need to edit the file, just jump around efficiently.
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Can C++ code be valid in both C++03 and C++11 but do different things?
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285
The answer is a definite yes. On the plus side there is:
Code that previously implicitly copi...
Adding the “Clear” Button to an iPhone UITextField
...ttribute for adding this sub-control in Interface Builder in the iPhone OS 2.2 SDK.
10 Answers
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Difference between parameter and argument [duplicate]
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202
Argument is often used in the sense of actual argument vs. formal parameter.
The formal param...