Stack Exchange

Wes McKinney

San Francisco, CA

blog.wesmckinney.com

Age: 28

Open source scientific Python contributor. CTO of technology startup Lambda Foundry, Inc.

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Top Questions
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Top Answers
57
Why are pandas merges in python faster than data.table merges in R?
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28
What is the most efficient way to loop through dataframes with pandas?
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19
Tutorial on PANDAS and PYTABLES
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19
What are the differences between Pandas and NumPy+SciPy in Python?
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17
append two data frame with pandas
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17
Vectorized look-up of values in Pandas dataframe
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15
How to convert pandas dataframe so that index is the unique set of values and data is the count of each value?
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15
Pandas Pivot tables row subtotals
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14
Selecting rows from a Pandas dataframe with a compound (hierarchical) index
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13
python-pandas and databases like mysql
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11
Add indexed column to DataFrame with pandas
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11
Converting a Pandas GroupBy object to DataFrame
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11
Remove NULL columns in a dataframe Pandas?
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11
Pandas DataFrame aggregate function using multiple columns
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11
How do I discretize values in a pandas DataFrame and convert to a binary matrix?
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10
Pandas DataFrame - Find row where values for column is maximal
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10
iterating row by row through a pandas dataframe
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10
Large, persistent DataFrame in pandas
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9
Calculate within categories: Equivalent of R's ddply in Python?
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9
selecting across multiple columns with python pandas?
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9
Pandas convert dataframe to array of tuples
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9
Pandas join/merge/concat two dataframes
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9
Import pandas dataframe column as string not int
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8
NumPy or Pandas: Keeping array type as integer while having a NaN value
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8
Delete column from pandas DataFrame
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7
Python: how to do basic data manipulation like in R?
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7
Simple cross-tabulation in pandas
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7
How can I generalize my pandas data grouping to more than 3 dimensions?
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7
Python Pandas - Re-ordering columns in a dataframe based on column name
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7
How to group pandas DataFrame entries by date in a non-unique column
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