DrawLoadings: Loadings plots

In ManonMartin/MBXUCL: R Routines for metabolomic data

Description

Draws Loadings plots for the SVDforPCA, PLSDA or OPLSDA functions.

Usage

DrawLoadings(
  obj,
  type.obj = c("PCA", "PLSDA", "OPLSDA"),
  createWindow = FALSE,
  main = NULL,
  axes = c(1, 2),
  loadingstype = c("l", "p", "s"),
  num.stacked = 4,
  xlab = NULL,
  ylab = NULL,
  ang = c("0", "45", "90"),
  xaxis_type = c("numerical", "character"),
  nxaxis = 10,
  hline = NULL,
  xaxis_size = 11
)

Arguments

obj	The objects resulting from a PCA, PLSDA or OPLSDA analysis.
type.obj	The type of object to be plotted.
createWindow	If TRUE, will create a new window for the plot.
main	Plot title. If NULL, default title is provided.
axes	Numerical vector indicating the PC axes that are drawn.
loadingstype	The type of Loadings plot, either a line plot ('l'), points ('p') or segments ('s').
num.stacked	Number of stacked plots.
xlab	Label for the x-axis.
ylab	Label for the y-axis.
ang	Angle to rotate the x axis labels for a better visualisation, either 0, 45 or 90 degrees.
xaxis_type	Specify if the xaxis is numerical or character
nxaxis	Number of thick marks on the xaxis for a character x variable
hline	Numerical scalar. If not NULL, an horizontal dashed line is drawn at the hline value
xaxis_size	Size of the x axis.

Details

Better results printping is obtained by saving the plot as an object

Value

A loading plot in the current device.

Examples

data('HumanSerum')
res.PCA = SVDforPCA(HumanSerumSpectra)

DrawLoadings(res.PCA, type.obj = 'PCA',
createWindow = FALSE, main = 'PCA loadings plot for HumanSerum dataset',
   axes = 1,  loadingstype='l', xlab = "L1")

ManonMartin/MBXUCL documentation built on Nov. 26, 2021, 8:45 p.m.