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Changing column names of a data frame
I have a data frame called "newprice" (see below) and I want to change the column names in my program in R.
16 Answers
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Way to read first few lines for pandas dataframe
...e lines ahead of time? I have a large file that takes a long time to read, and occasionally only want to use the first, say, 20 lines to get a sample of it (and prefer not to load the full thing and take the head of it).
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Convert.ChangeType() fails on Nullable Types
...s not seem to work for uniqueidentifier to string.
– Anders Lindén
Nov 5 '18 at 10:32
Is there any particular reason ...
Specify custom Date format for colClasses argument in read.table/read.csv
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You can write your own function that accepts a string and converts it to a Date using the format you want, then use the setAs to set it as an as method. Then you can use your function as part of the colClasses.
Try:
setAs("character","myDate", function(from) as.Date(from, for...
How to check if a table contains an element in Lua?
...r function is as efficient as can be done. Of course, as noted by others (and as practiced in languages older than Lua), the solution to your real problem is to change representation. When you have tables and you want sets, you turn tables into sets by using the set element as the key and true as ...
Do I need to store the salt with bcrypt?
...ng characters represented the hash value. The checker function knows this, and pulls the hash apart to get the salt back out.
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Why is the apt-get function not working in the terminal on Mac OS X v10.9 (Mavericks)?
I was watching this , and, as you can see, the first command I am told to put in is:
5 Answers
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How to apply a style to an embedded SVG?
...t the stylesheet into the svg document using script.
Something like this, and note that this code assumes that the <object> has loaded fully:
var svgDoc = yourObjectElement.contentDocument;
var styleElement = svgDoc.createElementNS("http://www.w3.org/2000/svg", "style");
styleElement.textCon...
Contain form within a bootstrap popover?
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I would put my form into the markup and not into some data tag.
This is how it could work:
JS Code:
$('#popover').popover({
html : true,
title: function() {
return $("#popover-head").html();
},
content: function() {
return $("#pop...
Does a dot have to be escaped in a character class (square brackets) of a regular expression?
...r except ^, -, ] or \ is a literal.
This website is a brilliant reference and has lots of info on the nuances of different regex flavours.
http://www.regular-expressions.info/refcharclass.html
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