首先要先导入数据

library(ggplot2)

library(reshape2)

> head(mydata)

mpg disp hp drat wt qsec

Mazda RX4 21.0 160 110 3.90 2.620 16.46

Mazda RX4 Wag 21.0 160 110 3.90 2.875 17.02

Datsun 710 22.8 108 93 3.85 2.320 18.61

Hornet 4 Drive 21.4 258 110 3.08 3.215 19.44

Hornet Sportabout 18.7 360 175 3.15 3.440 17.02

Valiant 18.1 225 105 2.76 3.460 20.22

然后进行相关性计算

mydata_cor<-cor(mydata)

> mydata_cor

mpg disp hp drat wt qsec

mpg 1.0000000 -0.8475514 -0.7761684 0.68117191 -0.8676594 0.41868403

disp -0.8475514 1.0000000 0.7909486 -0.71021393 0.8879799 -0.43369788

hp -0.7761684 0.7909486 1.0000000 -0.44875912 0.6587479 -0.70822339

drat 0.6811719 -0.7102139 -0.4487591 1.00000000 -0.7124406 0.09120476

wt -0.8676594 0.8879799 0.6587479 -0.71244065 1.0000000 -0.17471588

qsec 0.4186840 -0.4336979 -0.7082234 0.09120476 -0.1747159 1.00000000