Commands set-1 in R
q()
2+3
7-4
2*4
4/3
14%%3
2^3
x <- 2+3
x1 = 7+3
y = c(1:10)
y = c(1,5, 6, 8, 3, 6, 2, 10)
y1 = c(1:10)
length(y)
y[3]
y[3] = 23
fix(y)
ys = sort(y)
ysD = sort(y, decreasing = T)
ysD
mean(y)
length(y)
sum(y)
var(y)
median(y)
sd(y)
range(y)
ry = range(y)
ry[1]
ry[2]
ry[2] - ry[1]
data1 = rbinom(100, 10, .3)
mean(data1)
boxplot(data1)
hist(data1)
quantile(data1)
quantile(data1, prob = .4)
quantile(data1, prob = c(.15, .40, 0.62, 0.99))
summary(data1)
sqrt(9)
frData1 = table(data1)
frData1 = table(data2)
x2 = seq(1:5, by = 0.5)
x3 = seq(0,50, by = 5)
x3 = seq(0,50, len = 5)
x4 = rep(1:5, times = 3)
x5 = rep(c(1,3,5), times = 3)
x51 = rep(y, times = 3)
x52 = rep(y, each = 3)
x5[5:12]
subX5 = x5[5:12]
subX5 = x5[-(5:12)]
x5 = 1:20
subX5 = x5[-(5:12)]
subX52 = x5[5:12]
unique(data1)
y = rnorm(10, 20, 3)
x1 = rnorm(10, 15, 6)
x2 = rnorm(10, 12, 4)
matY = matrix(y)
ones = rep(1, times = 10)
matX = matrix(c(ones, x1,x2), ncol = 3)
matXt = t(matX)
matXtX = matXt*matX
matXtX = matXt%*%matX
invmatXtX = solve(matXtX)
invmatXtX
matXtY = matXt%*%matY
beta = invmatXtX%*%matXtY
sMat = matrix(1:9, ncol = 3)
det(sMat)
solve(sMat)
u3 = diag(3)
nMat = cbind(sMat,u3)
nMat2 = rbind(sMat,u3)
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