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Factors in R: more than an annoyance?
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You should use factors. Yes they can be a pain, but my theory is that 90% of why they're a pain is because in read.table and read.csv, the argument stringsAsFactors = TRUE by default (and most users miss this subtlety). I say they are useful because model fitting packages like lme4 use factors a...
Calculate distance between two latitude-longitude points? (Haversine formula)
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1170
This link might be helpful to you, as it details the use of the Haversine formula to calculate t...
jQuery removeClass wildcard
...r-\S+/g) || []).join(' ');
});
Live example: http://jsfiddle.net/xa9xS/1409/
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How to set the margin or padding as percentage of height of parent container?
... place a div inside another, and in the inner div, use something like top:50% (remember position matters if it still doesn't work)
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How do I replace a character at a particular index in JavaScript?
...rototype.replaceAt = function(index, replacement) {
return this.substr(0, index) + replacement + this.substr(index + replacement.length);
}
And use it like this:
var hello = "Hello World";
alert(hello.replaceAt(2, "!!")); // Should display He!!o World
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How to succinctly write a formula with many variables from a data frame?
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There is a special identifier that one can use in a formula to mean all the variables, it is th...
How do you launch the JavaScript debugger in Google Chrome?
... mplungjan
118k2323 gold badges142142 silver badges201201 bronze badges
answered Sep 15 '08 at 20:08
John SheehanJohn Sheehan
72.7...
How to evaluate http response codes from bash/shell script?
...fix to one of our webservers that frequently fails, returning status code 500 with an error message. Once this happens, it needs to be restarted.
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What is the difference between mutex and critical section?
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