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Plot correlation matrix into a graph
...ation matrix, plot it using one of the various tutorials out there.
Using base graphics:
http://flowingdata.com/2010/01/21/how-to-make-a-heatmap-a-quick-and-easy-solution/
Using ggplot2:
http://learnr.wordpress.com/2010/01/26/ggplot2-quick-heatmap-plotting/
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git command to show all (lightweight) tags creation dates
.... For example:
git tag -l --format='%(refname) %(taggerdate)'
Update, based on the comments below:
git tag -l --sort=-creatordate --format='%(creatordate:short): %(refname:short)'
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Why do Python's math.ceil() and math.floor() operations return floats instead of integers?
...t buy the "the point of..." claim; it seems that you're defining the point based on what it does, rather than what a programmer might want.
– ShreevatsaR
Aug 18 '13 at 17:25
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AWS Difference between a snapshot and AMI
... AMIs (and corresponding instances):
instance-store (sometimes called S3-based). These are less common and I don't recommend them for beginners. An instance-store AMI is a copy of the root instance-store volume plus some metadata, all saved in an S3 bucket in a special format
EBS boot. This is ...
How do I determine whether my calculation of pi is accurate?
... = # of decimal digits desired
p = 64-bit prime number
Compute A using base 10 arithmetic and B using binary arithmetic.
If A = B, then with "extremely high probability", the conversion is correct.
For further reading, see my blog post Pi - 5 Trillion Digits.
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Developing for Android in Eclipse: R.java not regenerating
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Compare two MySQL databases [closed]
I'm currently developing an application using a MySQL database.
21 Answers
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go to character in vim
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
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Partial Commits with Subversion
...ease notes, but I can't figure out which feature "Restore after commit" is based on.
– DavidS
Feb 23 '17 at 18:55
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Why are flag enums usually defined with hexadecimal values
...y, we're not dealing with numbers in the arbitrary human-invented world of base ten anymore. We're dealing with bits - the machine's world - and we're gonna play by its rules." Hexadecimal is rarely used unless you're dealing with relatively low-level topics where the memory layout of data matters...