3+5
[1] 8
3-6
[1] -3
3*9
[1] 27
9/5
[1] 1.8
4+2*(log(4)-exp(4))
[1] -102.4237
name_vec.1<-c(3,5,7,9,5.7,6,12)
name_vec.1
[1] 3.0 5.0 7.0 9.0 5.7 6.0 12.0
name_vec.2= c(5,8,6,2)
name_vec.2
[1] 5 8 6 2
3*name_vec.1
[1] 9.0 15.0 21.0 27.0 17.1 18.0 36.0
name_vec.1-name_vec.2
Warning in name_vec.1 - name_vec.2 :
longer object length is not a multiple of shorter object length
[1] -2.0 -3.0 1.0 7.0 0.7 -2.0 6.0
name_vec.1[3]
[1] 7
name_vec.1[1:5]
[1] 3.0 5.0 7.0 9.0 5.7
name_vec.1[c(1,5,6)]
[1] 3.0 5.7 6.0
rev(sort(name_vec.1))
[1] 12.0 9.0 7.0 6.0 5.7 5.0 3.0
m<-mean(name_vec.1)
m
[1] 6.814286
round(m,2)
[1] 6.81
vec.3<-c("albania", "mexico","romania")
vec.3
[1] "albania" "mexico" "romania"
vec.4<-c(vec.3,"europe")
vec.4
[1] "albania" "mexico" "romania" "europe"
rev(sort(vec.3))
[1] "romania" "mexico" "albania"
t(vec.3)
[,1] [,2] [,3]
[1,] "albania" "mexico" "romania"
t(t(vec.3))
[,1]
[1,] "albania"
[2,] "mexico"
[3,] "romania"
min(name_vec.1)
[1] 3
max(name_vec.1)
[1] 12
sd(name_vec.1)
[1] 2.928269
var(name_vec.1)
[1] 8.574762
fivenum(name_vec.1)
[1] 3.00 5.35 6.00 8.00 12.00
quantile(name_vec.1)
0% 25% 50% 75% 100%
3.00 5.35 6.00 8.00 12.00
seq(1,20,0.1)
[1] 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7
[19] 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5
[37] 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.0 6.1 6.2 6.3
[55] 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1
[73] 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9
[91] 10.0 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 10.9 11.0 11.1 11.2 11.3 11.4 11.5 11.6 11.7
[109] 11.8 11.9 12.0 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 13.0 13.1 13.2 13.3 13.4 13.5
[127] 13.6 13.7 13.8 13.9 14.0 14.1 14.2 14.3 14.4 14.5 14.6 14.7 14.8 14.9 15.0 15.1 15.2 15.3
[145] 15.4 15.5 15.6 15.7 15.8 15.9 16.0 16.1 16.2 16.3 16.4 16.5 16.6 16.7 16.8 16.9 17.0 17.1
[163] 17.2 17.3 17.4 17.5 17.6 17.7 17.8 17.9 18.0 18.1 18.2 18.3 18.4 18.5 18.6 18.7 18.8 18.9
[181] 19.0 19.1 19.2 19.3 19.4 19.5 19.6 19.7 19.8 19.9 20.0
length(name_vec.1)
[1] 7
sum(name_vec.1)
[1] 47.7
M1<-matrix(c(1,3,5,6,7,8,9,8),nrow=4,byrow = TRUE )
M1
[,1] [,2]
[1,] 1 3
[2,] 5 6
[3,] 7 8
[4,] 9 8
M1[2,2]
[1] 6
M1[,2]
[1] 3 6 8 8
M1[c(1,3),2]
[1] 3 8
v1<-c(3,4,5,6)
v2<-c(8,5,4,3)
rbind(v1,v2)
[,1] [,2] [,3] [,4]
v1 3 4 5 6
v2 8 5 4 3
cbind(v2,v1)
v2 v1
[1,] 8 3
[2,] 5 4
[3,] 4 5
[4,] 3 6
df.V<-data.frame(v1,v2)
df.V
df.V$v2
[1] 8 5 4 3
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