brief matplotlib api primer figures and subplots colorsmarkersand line styles tickslabelsand legends annotations and drawing on subplot saving plots to file matplotlib configuration plotting functions in pandas line plots bar plots histograms and density plots scatter plots plotting mapsvisualizing haiti earthquake crisis data python visualization tool ecosystem chaco mayavi other packages the future of visualization tools data aggregation and group operations groupby mechanics iterating over groups selecting column or subset of columns grouping with dicts and series grouping with functions grouping by index levels data aggregation column-wise and multiple function application returning aggregated data in "unindexedform group-wise operations and transformations applygeneral split-apply-combine quantile and bucket analysis examplefilling missing values with group-specific values examplerandom sampling and permutation examplegroup weighted average and correlation examplegroup-wise linear regression pivot tables and cross-tabulation cross-tabulationscrosstab example federal election commission database donation statistics by occupation and employer bucketing donation amounts donation statistics by state table of contents vii www it-ebooks info