问题
I am new to coding and R. I was trying to visualize a correlation matrix using corrplot, but don't want to show all the correlation values. I wish to hide/cancel a chunk of selected columns and rows correlation values, so only an inverted 'L' of values are shown.
As an example, see edited image of an example corrplot here:
回答1:
Set those entries you want blank in the plot to NA in the correlation matrix (or a copy of it) and then set the argument na.label=" " in the call to corrplot.
回答2:
exclude these columns by using indexes, for example
M <- cor( mtcars[ , -c(1, 3, 6)] )
corrplot(M, method = "ellipse")
where we exclude columns 1, 3, 6 (variables mpg, disp, cyl). Other way would be specifying which columns should be evaluated
mtcars[ , c(2:4, 7) ]
takes into account columns 2, 3, 4 and 7. Go through some R tutorial for beginners to familiarize yourself with coding conventions.
来源：https://stackoverflow.com/questions/23213754/how-to-hide-selected-correlations-for-corrplot