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What does the “|” (single pipe) do in JavaScript?
Why does 0.5 | 0 return zero, but any integer (including negative) returns the input integer? What does the single pipe ("|") do?
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How to sort a dataFrame in python pandas by two or more columns?
..., False])
For example:
In [11]: df1 = pd.DataFrame(np.random.randint(1, 5, (10,2)), columns=['a','b'])
In [12]: df1.sort(['a', 'b'], ascending=[True, False])
Out[12]:
a b
2 1 4
7 1 3
1 1 2
3 1 2
4 3 2
6 4 4
0 4 3
9 4 3
5 4 1
8 4 1
As commented by @renadeen
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How to take column-slices of dataframe in pandas
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252
2017 Answer - pandas 0.20: .ix is deprecated. Use .loc
See the deprecation in the docs
.loc u...
Fastest way to replace NAs in a large data.table
...le) # v1.6.6
require(gdata) # v2.8.2
set.seed(1)
dt1 = create_dt(2e5, 200, 0.1)
dim(dt1)
[1] 200000 200 # more columns than Ramnath's answer which had 5 not 200
f_andrie = function(dt) remove_na(dt)
f_gdata = function(dt, un = 0) gdata::NAToUnknown(dt, un)
f_dowle = function(dt) { ...
How to get different colored lines for different plots in a single figure?
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5 Answers
5
Active
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In git, is there a way to show untracked stashed files without applying the stash?
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5 Answers
5
Active
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Operation on every pair of element in a list
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Ben BlankBen Blank
48.4k2525 gold badges121121 silver badges148148 bronze badges
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What do hjust and vjust do when making a plot using ggplot?
...An example should make this clear:
td <- expand.grid(
hjust=c(0, 0.5, 1),
vjust=c(0, 0.5, 1),
angle=c(0, 45, 90),
text="text"
)
ggplot(td, aes(x=hjust, y=vjust)) +
geom_point() +
geom_text(aes(label=text, angle=angle, hjust=hjust, vjust=vjust)) +
facet_grid(~angle)...
Difference between `mod` and `rem` in Haskell
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answered May 4 '11 at 23:54
Fred FooFred Foo
317k6464 gold badges662662 silver badges785785 bronze badges
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