Some summary statistics of a vector for each level of a grouping variable.
Some summary statistics of a vector for each level of a grouping variable.
group(x,ina,method="sum",ina.min=NULL,ina.max = NULL, ina.length.unique=NULL,mad.method="median") group.sum(x, ina,ina.max = NULL,ina.min = NULL) group.mean(x, ina,ina.max = max(ina))
x |
A numerical vector with data. |
ina |
A numerical vector with numbers. Note that zero and negative values are not allowed as this can cause R to run forever or crash. |
ina.length.unique |
Length of the unique numerical values of ina argument. |
method |
A character vector with values "sum", "var", "all", "any", "mad", "mean", "med", "min", "max", "min.max". |
ina.max |
Maximum number for vector ina. |
ina.min |
Minimum number for vector ina. |
mad.method |
A character vector with values "median", for median absolute deviation or "mean", for mean absolute deviation. This works only with method="mad". |
This command works only for vectors. Median absolute deviation, mean, median, minimum, maximum are some of the options offered.
A vector with the variance, or standard deviation, or mean, or minimum, or maximum, or median, or minimum-maximum of x for each distinct value of ina.
Manos Papadakis and Michail Tsagris
R implementation and documentation: Manos Papadakis <papadakm95@gmail.com> and Michail Tsagris <mtsagris@yahoo.gr>.
## Not run: x <- rgamma(100,1, 4) ina <- sample(1:5, 100, TRUE) res<-group(x, ina,method="var") ## End(Not run)
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