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Pass a data.frame column name to a function
...ust use the column name directly:
df <- data.frame(A=1:10, B=2:11, C=3:12)
fun1 <- function(x, column){
max(x[,column])
}
fun1(df, "B")
fun1(df, c("B","A"))
There's no need to use substitute, eval, etc.
You can even pass the desired function as a parameter:
fun1 <- function(x, column...
How do I convert a git repository to mercurial?
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– Umar Farooq Khawaja
May 2 '14 at 12:22
The description is somewhat incomplete as it doesn't specify that hg will ne...
How do I interpret precision and scale of a number in a database?
...efers to the maximum number of digits that are present in the number.
ie 1234567.89 has a precision of 9
Numeric scale refers to the maximum number of decimal places
ie 123456.789 has a scale of 3
Thus the maximum allowed value for decimal(5,2) is 999.99
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How to check if a value exists in a dictionary (python)
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macmac
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Does VBA have Dictionary Structure?
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answered May 27 '09 at 12:04
Mitch WheatMitch Wheat
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List of Java class file format major version numbers?
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answered Feb 7 '12 at 4:05
MichaelMichael
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AngularJS ng-include does not include view unless passed in $scope
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Tushar
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answered Sep 20 '12 at 22:38
ToshTosh
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List distinct values in a vector in R
... csgillespiecsgillespie
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Unable to access JSON property with “-” dash
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answered Dec 13 '12 at 22:31
SLaksSLaks
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how to convert a string to date in mysql?
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STR_TO_DATE('12/31/2011', '%m/%d/%Y')
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