Advanced tabular data processing with pandas
嚜澤dvanced tabular data
processing with pandas
Day 2
Pandas library
? Library for tabular data I/O and analysis
? Useful in stored scripts and in ipython notebooks
Biocomputing Bootcamp 2016
DataFrame
? Tables of 2D data = rows x columns
? Similar to "data.frame" in R
? Notebook provides "pretty print"
Biocomputing Bootcamp 2016
Read data frames from files
? Pandas can read data from various formats
? Most common in genomics:
? pd.read_table 每 read from comma or tab delimited file
每
每 Full docs here
? pd.read_excel 每 read from Excel spreadsheet
?
每 Full docs here
? Read in US Cereal stats table (source)
? What type of value does this return?
Biocomputing Bootcamp 2016
Write data frames to files
? Data can be written out in various formats too
? df.to_csv 每 write to tab/comma delimited
每 where df is a DataFrame value
每
? Write US cereal stats back out to disk, using comma
deliminters, to "cereals.csv".
Biocomputing Bootcamp 2016
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