Visulization of correlation matrix 2

The plot.corr() function was updated, now it can
1. Add colorkey and text labels more flexible.
2. Reorder the variables using PCA or hierarchical clustering methods.
3. Excellent in details.
4. Other.

What's more, I found a new method to display correlation matricex, using squares with different areas and colors .

See also here . Get corrplot package here.