Eric’s Enlightenment for Monday, April 20, 2015
April 20, 2015 2 Comments
- John D. Cook explains why is defined to be equal to . This is also an excellent post on how definitions are created in mathematics.
- Why are GDP estimates often unreliable? (Jonathan Jones wrote this report for Britain, but it’s likely applicable to all countries.)
- Rick Wicklin shares useful code for counting the number of missing and non-missing observations in a data set in SAS.
- “A potentially game-changing breakthrough in artificial photosynthesis may be able to solve the world’s carbon emission problem…“