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Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...aul Murrell's package compare:
library(compare)
a1 <- data.frame(a = 1:5, b = letters[1:5])
a2 <- data.frame(a = 1:3, b = letters[1:3])
comparison <- compare(a1,a2,allowAll=TRUE)
comparison$tM
# a b
#1 1 a
#2 2 b
#3 3 c
The function compare gives you a lot of flexibility in terms of wha...
PHP 5: const vs static
In PHP 5, what is the difference between using const and static ?
7 Answers
7
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ggplot with 2 y axes on each side and different scales
...
15 Answers
15
Active
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Sorting arrays in NumPy by column
...turn a copy:
In [1]: import numpy as np
In [2]: a = np.array([[1,2,3],[4,5,6],[0,0,1]])
In [3]: np.sort(a.view('i8,i8,i8'), order=['f1'], axis=0).view(np.int)
Out[3]:
array([[0, 0, 1],
[1, 2, 3],
[4, 5, 6]])
To sort it in-place:
In [6]: a.view('i8,i8,i8').sort(order=['f1'], axis...
Getting indices of True values in a boolean list
...e, False, False, False]
>>> [i for i, x in enumerate(t) if x]
[4, 5, 7]
For huge lists, it'd be better to use itertools.compress:
>>> from itertools import compress
>>> list(compress(xrange(len(t)), t))
[4, 5, 7]
>>> t = t*1000
>>> %timeit [i for i, x ...
How to embed small icon in UILabel
... |
edited Oct 17 '18 at 5:37
kelin
8,74866 gold badges5656 silver badges8585 bronze badges
answered Oc...
Exclude folders from Eclipse search
...marker/site/file.ftl'."
– Marc
Jan 25 '13 at 13:23
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show 4 more comments
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Where is the WPF Numeric UpDown control?
...
50
Simply use the IntegerUpDown control in the xtended wpf toolkit
You can use it like this:
Add...
How do I specify unique constraint for multiple columns in MySQL?
...
jonstjohnjonstjohn
54.9k88 gold badges3939 silver badges5555 bronze badges
...
git-svn not a git command?
... that git svn has ever worked with recent Git Windows distribution (post 1.5.6).
Many problems have been reported before, so git svn may very much be not included in current msysGit releases.
Another current active "Git on Windows" development mingw.git does state in its README that svn does not w...