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How to get the first column of a pandas DataFrame as a Series?
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143
>>> import pandas as pd
>>> df = pd.DataFrame({'x' : [1, 2, 3, 4], 'y' : [4, 5...
Mongodb Explain for Aggregation framework
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3 Answers
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cannot load such file — zlib even after using rvm pkg install zlib
I installed zlib package and ruby 1.9.3 using rvm, but whenever I try to install
gems it says
cannot load such file -- zlib
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How I can delete in VIM all text from current line to end of file?
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370
dG will delete from the current line to the end of file
dCtrl+End will delete from the cursor...
Why does Python code run faster in a function?
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3 Answers
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Combine two or more columns in a dataframe into a new column with a new name
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132
Use paste.
df$x <- paste(df$n,df$s)
df
# n s b x
# 1 2 aa TRUE 2 aa
# 2 3 bb ...
Evaluating string “3*(4+2)” yield int 18 [duplicate]
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arularul
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What's the point of map in Haskell, when there is fmap?
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3 Answers
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Thread-safe List property
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edited May 3 '11 at 19:09
answered May 3 '11 at 19:04
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How to pretty-print a numpy.array without scientific notation and with given precision?
...f the output:
import numpy as np
x=np.random.random(10)
print(x)
# [ 0.07837821 0.48002108 0.41274116 0.82993414 0.77610352 0.1023732
# 0.51303098 0.4617183 0.33487207 0.71162095]
np.set_printoptions(precision=3)
print(x)
# [ 0.078 0.48 0.413 0.83 0.776 0.102 0.513 0.462 0.335...