Visualizations Follow-up. Data: dimensions. Basic graphs. Gapminder. Excel. Wordle. Homework: Postings: research and experiment.

Follow-up from guest lecture Summarize? ?

Natural Language Processing Text to –text or –data extraction

Speech recognition input is sound wave captured as electrical amplitudes and frequencies first step is doing Fourier Analysis to encode sound wave as set of sine waves next step is segmentation: divide into (best guess) at syllabus (phonemes) THEN use statistical approach and/or grammar approach to make matches

NLP and Speech reco Can combine For each, issues of scope, speaker(aka user), training or not Distinct applications –limited (directed) speech –dictation –data extraction –translation –???

Consider several possible topics for presentation I will demonstrate duolingo.com which I am using to learn Spanish!!! –another possibility for presentation topic

Objective … of graphs, charts, diagrams, visualizations is to represent data. Typically data is sets of numbers or sets of other information. Examples: height and weight of some set of people –possibly with other characteristics and over time GDP, average longevity of countries –population, region, over time frequency of words in a piece of text

Caution If you don't have much data, then not much to do… if data is wrong or definitions not understood or misunderstood, ….

Preview Next Monday: guest speaker curator from Neuberger present artist visualizations

Organization / conference / competition / links

2012 Olympic medal count Issues –what counts? How to weigh types of medals? –Adjustment for population what about wealth of country? 8/07/sports/olympics/the-best-and-worst- countries-in-the-medal- count.html?ref=olympicshttp:// 8/07/sports/olympics/the-best-and-worst- countries-in-the-medal- count.html?ref=olympics

Gapminder

Excel graphs Construct data Bar graphs When are pie graphs appropriate? x-y graphs bubble graphs

Wordle

Dimension The term 'dimension' is used for any attribute of a thing, not just height/width/length Gapminder examples appeal (I think) because of quantity and dimensions of data –dynamic representation of time –color for regions –comparisons

Napoleon's March … into Russia Called by Edward Tufte (and others) the best (and still the best) graphical visualization. Use Google to get multiple versions Your opinion?

My Ds mnemonic definitions denominator dimensions [what's the] difference data sources distribution The point of visualizations is to show these things (and others?)

Examples … and excuse to start reminding you to vote 2/07/27/new-york-not-as-blue-as-it-could- be/ 2/07/27/new-york-not-as-blue-as-it-could- be/

Example Drawn to show electoral votes (and assessment on how states will vote) –dimensions of size versus population map –Note: the geographic view does not accurately display Alaska or Hawaii in position and size!!! –Try multiple maps (scenarios) + our own?

If these visualizations make you less likely to vote because New York is predicted to be solidly Democratic… popular vote will count in terms of mandate there are down ticket contests increasing the youth vote will make younger people be more important to politicians good to get into the habit people have died for the right to vote!

Example Periodic table of visualization methods (!) Periodic table: literacy.org/periodic_table/periodic_table.h tmlhttp:// literacy.org/periodic_table/periodic_table.h tml –assumes the periodic table has meaning for viewers

Timeline –on visualizations izations/mountains-out-of-molehills/ izations/mountains-out-of-molehills/ –see also

Tools /22_free_tools_for_data_visualizatio n_and_analysishttp:// /22_free_tools_for_data_visualizatio n_and_analysis _best_tools_for_visualization.phphttp:// _best_tools_for_visualization.php

Note / caution / repeat If you don't have much data, then visualization does not help –if data is (potentially) misunderstood or misleading Think about Ds

Homework Decide on presentation topic and make proposal to the appropriate moodle forum Postings: usual plus –any visualization topic Tools Edward Tufte: –Home page (not that easy to navigate and mainly tool to sell his workshops and books which are excellent: »Forum: »Critique of PowerPoint for lectures! »etc. Next class: guest speaker on artist visualizations