colmin {biganalytics} | R Documentation |
Basic summary statistics for “big.matrix” objects
Description
Functions operate on columns of a
big.matrix
object
Usage
colmin(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
colmin(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
min(x, ..., na.rm = FALSE)
colmax(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
colmax(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
max(x, ..., na.rm = FALSE)
colprod(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
colprod(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
prod(x, ..., na.rm = FALSE)
colsum(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
colsum(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
sum(x, ..., na.rm = FALSE)
colrange(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
colrange(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
range(x, ..., na.rm = FALSE)
colmean(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
colmean(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
mean(x, ...)
colvar(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
colvar(x, cols = NULL, na.rm = FALSE)
colsd(x, cols = NULL, na.rm = FALSE)
## S4 method for signature 'big.matrix'
colsd(x, cols = NULL, na.rm = FALSE)
colna(x, cols = NULL)
## S4 method for signature 'big.matrix'
colna(x, cols = NULL)
## S4 method for signature 'big.matrix'
summary(object)
Arguments
x |
a |
cols |
a scalar or vector of column(s) to be summarized. |
na.rm |
if |
... |
options associated with the correspoding default R function. |
object |
a |
Details
These functions essentially apply summary functions to each
column (or each specified column) of the
big.matrix
in turn.
Value
For colrange
, a matrix with two columns and
length(cols)
rows; column 1 contains the minimum, and column 2
contains the maximum for that column. The other functions return vectors
of length length(cols)
.
Examples
x <- as.big.matrix(
matrix( sample(1:10, 20, replace=TRUE), 5, 4,
dimnames=list( NULL, c("a", "b", "c", "d")) ) )
x[,]
mean(x)
colmean(x)
colmin(x)
colmin(x, 1)
colmax(x)
colmax(x, "b")
colsd(x)
colrange(x)
range(x)
colsum(x)
colprod(x)
[Package biganalytics version 1.1.22 Index]