plot.i_pca {idm}

Plotting 2D maps in Principal Component Analysis

Description

Graphical display of Principal Component Analysis results in two dimensions

Usage

## S3 method for class 'i_pca'
plot(x, dims = c(1,2), what = c(TRUE,TRUE), 
dataname = NULL, labels = NULL, animation = TRUE, frames = 10, 
zoom = TRUE, movie_format = "gif", ...)

Arguments

x

Principal component analysis object returned by i_pca

dims

Numerical vector of length 2 indicating the dimensions to plot on horizontal and vertical axes respectively; default is first dimension horizontal and second dimension vertical

what

Vector of two logicals specifying the contents of the plot(s). First entry indicates if the scatterplot of observations is displayed and the second entry if the correlation circle of the variable loadings is displayed (default = c(TRUE,TRUE) and shows both plots)

dataname

String prefix used for custom naming of output files; default is the name of the output object

labels

String vector of variable labels

animation

Logical indicating whether animated GIF or PDF files are created and saved to the hard drive or a static plot is created (default = TRUE)

frames

Number of animation frames shown per iteration (default = 10); applicable only when animation = TRUE

zoom

Logical indicating whether axes limits change during the animation creating a zooming effect; applicable only when animation = TRUE

movie_format

Specifies if the animated plot is saved in the working directory either in default = "gif" or "pdf" format

...

Further arguments passed to plot and points

Details

The function plot.i_pca makes a two-dimensional map of the object created by i_pca with respect to two selected dimensions.

References

ImageMagick: http://www.imagemagick.org; GraphicsMagick: http://www.graphicsmagick.org

See Also

plot.i_mca

Examples

data("iris", package = "datasets")
#standardize variables
X = scale(iris[,-5])
res_iPCA = i_pca(data1 = X[1:50,-5], data2 = X[51:150,-5], nchunk = c(50,50))
#static plot, final solution
plot(res_iPCA, animation = FALSE)

##\donttest is used here because the code calls the saveLatex function of the animation package 
#which requires ImageMagick or GraphicsMagick and 
#Adobe Acrobat Reader to be installed in your system 
#See help(im.convert) for details on the configuration of ImageMagick or GraphicsMagick.
#Creates animated plots in PDF for objects and variables
plot(res_iPCA, animation = TRUE, frames = 10, movie_format = 'pdf')