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How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly
...er pandas:]
You could use the function isnull instead of the method:
In [56]: df = pd.DataFrame([range(3), [0, np.NaN, 0], [0, 0, np.NaN], range(3), range(3)])
In [57]: df
Out[57]:
0 1 2
0 0 1 2
1 0 NaN 0
2 0 0 NaN
3 0 1 2
4 0 1 2
In [58]: pd.isnull(df)
Out[58]:
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git push to specific branch
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ragerdl
1,7961515 silver badges2626 bronze badges
answered Oct 3 '13 at 8:36
Petr MensikPetr Mensik
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I need to pop up and trash away a “middle” commit in my master branch. How can I do it?
...example, in the following master branch, I need to trash just the commit af5c7bf16e6f04321f966b4231371b21475bc4da, which is the second due to previous rebase:
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Why doesn't c++ have &&= or ||= for booleans?
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edited Feb 8 '19 at 16:45
answered Mar 21 '10 at 20:02
Ko...
Xcode 4.5 Storyboard 'Exit'
I have just installed Xcode 4.5 for iOS6 support, and I have seen a new icon called 'Exit' in my Storyboard, listed under my view controllers along with 'First Responder' etc. A little green icon labeled 'Exit'.
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Looking for a clear definition of what a “tokenizer”, “parser” and...
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answered Dec 19 '08 at 9:25
Roger LipscombeRoger Lipscombe
79.5k4747 gold badges210210 silver badges342342 bronze badges
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Add legend to ggplot2 line plot
... plot your data:
##Subset the necessary columns
dd_sub = datos[,c(20, 2,3,5)]
##Then rearrange your data frame
library(reshape2)
dd = melt(dd_sub, id=c("fecha"))
All that's left is a simple ggplot command:
ggplot(dd) + geom_line(aes(x=fecha, y=value, colour=variable)) +
scale_colour_manual(val...
Applying a git post-commit hook to all current and future repos
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VonCVonC
985k405405 gold badges33953395 silver badges39913991 bronze badges
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git shallow clone (clone --depth) misses remote branches
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edited May 19 '14 at 18:56
answered May 17 '14 at 11:01
F...
What's the difference between IQueryable and IEnumerable
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IEnumerable<T> represents a forward-only cursor of T. .NET 3.5 added extension methods that included the LINQ standard query operators like Where and First, with any operators that require predicates or anonymous functions taking Func<T>.
IQueryable<T> implements the same ...