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The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or
...ypes of questions:
http://cran.r-project.org/doc/manuals/R-lang.html#Indexing
R has three basic indexing operators, with syntax displayed by the following examples
x[i]
x[i, j]
x[[i]]
x[[i, j]]
x$a
x$"a"
For vectors and matrices the [[ forms are rarely used, althoug...
Map function in MATLAB?
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The short answer: the built-in function arrayfun does exactly what your map function does for numeric arrays:
>> y = arrayfun(@(x) x^2, 1:10)
y =
1 4 9 16 25 36 49 64 81 100
There are two other built-in functions that behave similarly: c...
Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
...reg locations may be OS-dependent. I collected this info from a Windows 10 x64 box. I'm just going to go ahead and dump all of these redist versions and the reg keys I search for to detect installation.:
Visual C++ 2005
Microsoft Visual C++ 2005 Redistributable (x64)
Registry Key: HKLM\SOFTWARE\...
LINQ: Select an object and change some properties without creating a new object
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I'm not sure what the query syntax is. But here is the expanded LINQ expression example.
var query = someList.Select(x => { x.SomeProp = "foo"; return x; })
What this does is use an anonymous method vs and expression. This allows you to use several s...
Remove all occurrences of char from string
... CharSequence arguments (eg, String) rather than char:
str = str.replace("X", "");
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Fastest way to determine if an integer is between two integers (inclusive) with known sets of values
Is there a faster way than x >= start && x <= end in C or C++ to test if an integer is between two integers?
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Load multiple packages at once
... -- but only if you specify the character.only argument to be TRUE. Quick example:
lapply(x, require, character.only = TRUE)
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HTML for the Pause symbol in audio and video control
...browsers, you probably shouldn't use that one. I am using the latest Firefox and it isn't readable.
– A Child of God
Mar 11 '18 at 12:28
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How to create UILabel programmatically using Swift?
How do I create a UILabel programmatically using Swift in Xcode 6?
12 Answers
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How to succinctly write a formula with many variables from a data frame?
...have a response variable and a data containing three covariates (as a toy example):
6 Answers
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