GetJCol: GetJCol

In jmatrix: Read from/Write to Disk Matrices with any Data Type in a Binary Format

GetJCol

Description

Returns (as a R numeric vector) the requested column number from the matrix contained in a jmatrix binary file

Usage

GetJCol(fname, ncol)

Arguments

fname	String with the file name that contains the binary data.
ncol	The number of the column to be returned, in R-numbering (from 1)

Value

A numeric vector with the values of elements in the requested column

Examples

Rf <- matrix(runif(48),nrow=6)
rownames(Rf) <- c("A","B","C","D","E","F")
colnames(Rf) <- c("a","b","c","d","e","f","g","h")
tmpfile1=paste0(tempdir(),"/Rfullfloat.bin")
JWriteBin(Rf,tmpfile1,dtype="float",dmtype="full",comment="Full matrix of floats")
Rf[,3]
vf<-GetJCol(tmpfile1,3)
vf

jmatrix documentation built on Oct. 9, 2023, 1:06 a.m.