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Select multiple columns in data.table by their numeric indices
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185
For versions of data.table >= 1.9.8, the following all just work:
library(data.table)
dt &...
Mapping two integers to one, in a unique and deterministic way
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18 Answers
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how to check the dtype of a column in python pandas
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127
You can access the data-type of a column with dtype:
for y in agg.columns:
if(agg[y].dtyp...
How to get first character of string?
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16 Answers
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`elif` in list comprehension conditionals
...essions were designed exactly for this sort of use-case:
>>> l = [1, 2, 3, 4, 5]
>>> ['yes' if v == 1 else 'no' if v == 2 else 'idle' for v in l]
['yes', 'no', 'idle', 'idle', 'idle']
Hope this helps :-)
s...
Set Matplotlib colorbar size to match graph
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198
You can do this easily with a matplotlib AxisDivider.
The example from the linked page also w...
How to read from a file or STDIN in Bash?
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15 Answers
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Automatically update version number
... Visual Studio (2005/2008). I have tried to specify the AssemblyVersion as 1.0.* but it doesn't get me exactly what I want.
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How to round a number to significant figures in Python
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146
You can use negative numbers to round integers:
>>> round(1234, -3)
1000.0
Thus if...