In package 'factoextra',when i use function 'fviz_eig',how to adjust the column width and label size ? ("width=0.6,text.size=17" seems can't work, also no error message show)

library(factoextra)
data(iris)
res.pca <- prcomp(iris[,-5],scale=TRUE)
fviz_eig(res.pca,addlabels = TRUE,choice = 'eigenvalue',
         ylim=c(0,3),width=0.6,text.size=17)

i want to change the text size which marked by bursh as below:

CodePudding user response：

Same with ggplot use theme(text = element_text(size = 10)) to resize label. Use bar_width inside fvie_eig to change width of bars.

fviz_eig(res.pca,addlabels = TRUE,choice = 'eigenvalue',
         ylim=c(0,3),bar_width=0.2)  theme(text = element_text(size = 10))

Manually

fviz_eig(res.pca,choice = 'eigenvalue',
         ylim=c(0,3),bar_width=0.2)   geom_text(label = round(res.pca$sdev^2,1), vjust=-0.4, hjust = 0, size = 5)

CodePudding user response：

The documentation is not clear about the extra arguments. It just says ... and to look under the options i.e.

... optional arguments to be passed to the function ggpar.

When we check the ggpar link

Use font.x = 14, to change only font size;

If we check the function fviz_eig

...
    extra_args <- list(...)
    bar_width <- extra_args$bar_width
    linetype <- extra_args$linetype

Therefore, instead of width, change it to bar_width would work. It is not giving any error because the variadic argument is ... and anything can be passed as input, but they may not be used within the function as per the extr_args extraction with bar_width and linetype implies

By changing the bar_width, was able to change to reproduce the changes in the width. Also, make use of label_size

fviz_eig(res.pca,addlabels = TRUE,choice = 'eigenvalue',
          ylim=c(0,3),bar_width=0.3, label_size = 10)

-output

fviz_eig(res.pca,addlabels = TRUE,choice = 'eigenvalue',
          ylim=c(0,3),bar_width=0.6, label_size = 17)