R语言绘图开帖

A <- A[,-2]A[,-3]
这也太人性化了，符号就代表相减。

O<-cor(delnan)
corrplot.mixed(O, lower = "number", upper = "circle", tl.col = "black",lower.col = "black", number.cex = 1)  

var.test(X,Y,conf.level = 0.95)

	F test to compare two variances

data:  X and Y
F = 1.2549, num df = 214, denom df = 681, p-value = 0.03517
alternative hypothesis: true ratio of variances is not equal to 1
95 percent confidence interval:
 1.015792 1.569904
sample estimates:
ratio of variances 
          1.254934 

P225
t.test(old$total,new$total,alternative = "greater",paired = FALSE)

	Welch Two Sample t-test

data:  old$total and new$total
t = 2.3204, df = 424.96, p-value = 0.0104
alternative hypothesis: true difference in means is greater than 0
95 percent confidence interval:
 0.7398228       Inf
sample estimates:
mean of x mean of y 
 12.86279  10.30811 

 
	F test to compare two variances

data:  old$total and new$total
F = 1.6429, num df = 480, denom df = 184, p-value = 0.0001094
alternative hypothesis: true ratio of variances is not equal to 1
95 percent confidence interval:
 1.282709 2.076794
sample estimates:
ratio of variances 
          1.642878