GetJManyRowsByNames: GetJManyRowsByNames

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

GetJManyRowsByNames

Description

Returns (as a R numeric matrix) the rows with the requested row names from the matrix contained in a jmatrix binary file

Usage

GetJManyRowsByNames(fname, extrownames)

Arguments

fname	String with the file name that contains the binary data.
extrownames	A vector of RStrings with the names of the rows to be extracted. If the binary file has no row names, or _any_ of the row names is not present, an empty matrix is returned.

Value

A numeric matrix with the values of elements in the requested rows

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[c("A","C"),]
vf<-GetJManyRowsByNames(tmpfile1,c("A","C"))
vf

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