R: A function to read in a text file saved from Excel

pamr.from.excel {pamr} | R Documentation

## A function to read in a text file saved from Excel

### Description

A function to read in a text file saved from Excel. The spreadsheet is assumed to be of the format used by the SAM program.

### Usage

    pamr.from.excel(file, ncols, sample.labels = FALSE, batch.labels = FALSE)

### Arguments

`file` | Character name of a text file. This is assumed to be a tab-delimited text file saved from an excel spreadsheet from "SAM". The spreadsheet has one row of expression values per gene. In addition there is one information row and two information columns. The first row has class labels for each of the samples. The first column had gene identifiers, and the second column has gene names. In the SAM program, for the multiclass option, the samples must be labelled 1,2,3 etc. Here we allow general labels, like "lymphoma", "colon cancer" etc
`ncols` | Number of columns in file
`sample.labels` | Optional argument. If true, "file" is assumed to have an additional row at the top, consisting of two blank cells followed by a sample labels for each of the columns. If available, these sample labels are used by various plotting routines.
`batch.labels` | Optional argument. If true, "file" is assumed to have an additional row at the top, consisting of two blank cells followed by a batch labels for each of the columns. If sample.labels=T as well, the row of batch labels are assumed to come after the row of sample labels. The batch labels are used by the function pamr.batchadjust.

### Details

`pamr.from.excel` Reads in the text file "file", and creates an object with components x (the matrix of expression values), y- a vector of class labels for each sample, geneid- a vector of gene identifiers and genenames- a vector of gene names

### Value

A list with components

`x` | the matrix of expression values
`y` | a vector of class labels for each sample
`geneid` | a vector of gene identifiers
`genenames` | a vector of gene names
`samplelabels` | a vector of sample labels, if provided in "file"
`batchlabels` | a vector of batch labels, if provided in "file"

### Author(s)

Trevor Hastie, Robert Tibshirani, Balasubramanian Narasimhan, and Gilbert Chu

[Package pamr version 1.55 Index]