Monthly Archives: June 2013

Featured Chart: Car Ferry Congestion by Day

Wash­ing­ton State Fer­ries have an effec­tive visual grid show­ing hour, day, and con­ges­tion for vehi­cle fer­ries on dif­fer­ent routes in the Puget Sound. The exam­ple below shows Ana­cortes to the San Juan Islands in early sum­mer. Fri/​Sat are most con­gested between 9am and 4pm where pas­sen­gers would have to wait in line for mul­ti­ple ferry […]

Big Data Bookshelf: Data Flow 2

Data Flow 2 presents many use­ful exam­ples of data visu­al­iza­tion which are orga­nized by the form of the chart or info­graphic: Data Maps — maps and car­tograms Data Process — process or flow charts Data Blocks — bar carts, colum­nar charts, 3d blocks Data Cir­cles — cir­cles, pie charts It’s a use­ful book with lots […]

Featured Chart: Linguistic Geography of Bubbler vs. Water Fountain

This week’s chart is a visu­al­iza­tion of usage for “Water Foun­tain” vs. Drink­ing Foun­tainvs. “Bub­bler”. Water foun­tain pre­dom­i­nates in the south and north­east, while drink­ing foun­tain in the west. “Bub­ble” is regional in the upper Mid­west. The inter­ac­tive appli­ca­tion is avail­able from Joshua Katz a PhD can­di­date in sta­tis­tics at NC State. There are a […]

Big Data Bookshelf : DAX Formulas for PowerPivot

Power­pivot is an addin for Microsoft Excel which enables analy­sis of larger data sets (>1M rows) within Excel and also more sophis­ti­cated analy­sis that typ­i­cally would involve mul­ti­ple SQL queries with com­plex data joins. I blogged about learn­ing Pow­er­pivot last year. One of the dif­fi­cult things is the lack of usable doc­u­men­ta­tion or cook­books on […]

Big Data Bookshelf: Data Points: Visualization that Means Something

In the newly released book Data Points: Vsu­al­iza­toin that Means Some­thing, Nathan Yau (Flow­ing Data blog) shares his ideas on under­stand­ing, visu­al­iz­ing, and ana­lyz­ing data. The exam­ples are use­ful and imple­mentable. Many focus on sets of graphs with mul­ti­ple dimen­sions of data, rather than a sin­gle chart type. The author also presents ideas and examples […]