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Aggregate / summarize multiple variables per group (e.g. sum, mean)
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Where is this year() function from?
You could also use the reshape2 package for this task:
require(reshape2)
df_melt <- melt(df1, id = c("date", "year", "month"))
dcast(df_melt, year + month ~ variable, sum)
# year month x1 x2
1 2000 1 -80.83405 -224.9540159
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How to extract the n-th elements from a list of tuples?
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edited Mar 6 '19 at 20:33
cs95
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Centering controls within a form in .NET (Winforms)? [duplicate]
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254
You could achieve this with the use of anchors. Or more precisely the non use of them.
Contr...
How do you test that a Python function throws an exception?
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724
Use TestCase.assertRaises (or TestCase.failUnlessRaises) from the unittest module, for example:...
How to escape braces (curly brackets) in a format string in .NET
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1295
For you to output foo {1, 2, 3} you have to do something like:
string t = "1, 2, 3";
string v...
New Array from Index Range Swift
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This works for me:
var test = [1, 2, 3]
var n = 2
var test2 = test[0..<n]
Your issue could be with how you're declaring your array to begin with.
EDIT:
To fix your function, you have to cast your Slice to an array:
func aFunction(numbers: Array<Int...
Standard deviation of a list
I want to find mean and standard deviation of 1st, 2nd,... digits of several (Z) lists. For example, I have
8 Answers
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python tuple to dict
For the tuple, t = ((1, 'a'),(2, 'b'))
dict(t) returns {1: 'a', 2: 'b'}
6 Answers
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How to pass a single object[] to a params object[]
...at you mean in this case.
Foo((object)new object[]{ (object)"1", (object)"2" }));
As an array is a subtype of object, this all works out. Bit of an odd solution though, I'll agree.
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