Looking at the farmers market data IMP R OVIN G YOU R DATA VISU - PowerPoint PPT Presentation

Looking at the farmers market data IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON Nick Stra y er Instr u ctor

First e x plorations of a dataset Take a broad v ie w Sho w as m u ch info as possible Don ' t f u ss o v er appearances IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Using y o u r head () pollution.head() IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

# Just show median pollution.describe(percentiles=[0.5] # Describe all columns include='all') IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

pd.plotting.scatter_matrix(pollution, alpha = 0.2); IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

markets.head() IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Let ' s e x plore o u r data IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON

E x ploring the patterns IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON Nick Stra y er Instr u ctor

Digging in deeper In v estigating correlations Are correlations dri v en b y confo u nding ? An y thing s u rprising ? IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Target a u diences Shared w ith peers Be smart abo u t design decisions Remember the y aren ' t as familiar w ith data IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

sns.regplot('NO2', 'CO', ci=False, data=pollution, # Lower opacity of points scatter_kws={'alpha':0.2, 'color':'grey'} ) IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Profiling patterns Fo u nd interesting pa � ern in data Ho w to q u ickl y e x plore and e x plain the pa � ern ? Use te x t ! IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Using te x t scatters to id o u tliers IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

g = sns.scatterplot("SO2","CO", data=long_beach_avgs) # Iterate over the rows of our data for _, row in long_beach_avgs.iterrows(): # Unpack columns from row month, SO2, CO = row # Draw annotation in correct place g.annotate(month, (SO2,CO)) plt.title('Long Beach avg SO2 by CO') IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Let ' s dig in IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON

Making y o u r v is u ali z ations efficient IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON Nick Stra y er Instr u ctor

What is efficient ? Red u ce the e � ort needed to see stor y Re - organi z e plots to keep foc u s Impro v e ' ink ' to info ratio Don ' t compromise the message IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

# Create a subplot w/ one row & two columns. f, (ax1, ax2) = plt.subplots(1, 2) # Pass each axes to respective plot sns.lineplot('month', 'NO2', 'year', ax=ax1, data=pol_by_month) sns.barplot('year', 'count', ax=ax2, data=obs_by_year) IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Clear u nnecessar y legends IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

sns.lineplot('month', 'NO2', 'year', ax=ax1, data=pol_by_month, palette='RdBu',) sns.barplot('year', 'count', 'year', ax=ax2, data=obs_by_year, palette='RdBu', dodge=False) # Remove legends for both plots ax1.legend_.remove() ax2.legend_.remove() IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Let ' s practice IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON

T w eaking y o u r plots IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON Nick Stra y er Instr u ctor

Looking at the small things P u t y o u rself into the v ie w er ' s shoes IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Is the aesthetic appropriate ? Is the aesthetic appropriate for the conte x t ? IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Font - si z es Is e v er y thing legible ? IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Remo v ing spines from plots IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Remo v ing spines from plots IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Let ' s t w eak some plots IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON

Wrap - Up IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON Nick Stra y er Instr u ctor

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Using color responsibl y IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Going f u rther Blogs Flo w ing data C u rated list of data v is u ali z ations . Data w rapper Blog Articles that dig deep into v is u ali z ation techniq u es and mistakes . T w i � er # data v is An ongoing stream of cool projects and inspiration . IMPROVING YOUR DATA VISUALIZATIONS IN PYTHON

Thank y o u! IMP R OVIN G YOU R DATA VISU AL IZATION S IN P YTH ON