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Repeat each row of data.frame the number of times specified in a column
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answered May 24 '10 at 5:01
neilfwsneilfws
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How do I delete rows in a data frame?
...'-' operator.
So, assuming the data.frame is called myData:
myData[-c(2, 4, 6), ] # notice the -
Of course, don't forget to "reassign" myData if you wanted to drop those rows entirely---otherwise, R just prints the results.
myData <- myData[-c(2, 4, 6), ]
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Removing multiple keys from a dictionary safely
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Nested classes' scope?
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edited Mar 14 '17 at 21:35
martineau
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How do I map lists of nested objects with Dapper
...Sam Saffron
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How to include a quote in a raw Python string
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144
If you want to use double quotes in strings but not single quotes, you can just use single quot...
How can you strip non-ASCII characters from a string? (in C#)
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417
string s = "søme string";
s = Regex.Replace(s, @"[^\u0000-\u007F]+", string.Empty);
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What is the purpose of using -pedantic in GCC/G++ compiler?
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WazeryWazery
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Understanding dict.copy() - shallow or deep?
...gt;>> a, b
({1: [1, 2, 3]}, {1: [1, 2, 3]})
>>> a[1].append(4)
>>> a, b
({1: [1, 2, 3, 4]}, {1: [1, 2, 3, 4]})
In contrast, a deep copy will copy all contents by value.
>>> import copy
>>> c = copy.deepcopy(a)
>>> a, c
({1: [1, 2, 3, 4]}, {1: [1,...
typedef struct vs struct definitions [duplicate]
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edited Feb 9 at 16:34
RobertS supports Monica Cellio
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