[R]2変量の散布図

# 2変量の散布図
png('test3.png')
plot(cars)
dev.off()

# 相関係数Rを求める
r = cor(cars$speed, cars$dist)
r

# 相関かどうかの検定
cor.test(cars$speed, cars$dist)

実行結果

$ Rscript test3.R
null device
  1
[1] 0.8068949

  Pearson's product-moment correlation

data: cars$speed and cars$dist
t = 9.464, df = 48, p-value = 1.49e-12
alternative hypothesis: true correlation is not equal to 0
95 percent confidence interval:
 0.6816422 0.8862036
sample estimates:
  cor
0.8068949

Pearson's product-moment correlationの内容

Parameter	Description
df	Degrees of Freedom
p-value	p値
95 percent confidence interval	95%信頼区間

出力結果