Rstudio8

A<- c(1L, 2L, 3L, 4L, 5L, 6L);
print(A);

## [1] 1 2 3 4 5 6

typeof(A);

## [1] "integer"

class(A);

## [1] "integer"

A <- c(1,2,3,4,5,6);
print(A);

## [1] 1 2 3 4 5 6

length(A);

## [1] 6

A<-1:8;
print(A);

## [1] 1 2 3 4 5 6 7 8

A[2];

## [1] 2

A[c(2,5)]

## [1] 2 5

A[c(2:5)]; #연속적으로 낭려되어있는 숫자들은 벡터로 쓴다 c사용

## [1] 2 3 4 5

A[-2];

## [1] 1 3 4 5 6 7 8

A[c(FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE)];

## [1] 2 4 6 8

A[A>5];

## [1] 6 7 8

A[3] <-9;
print(A);

## [1] 1 2 9 4 5 6 7 8

R Markdown

This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see http://rmarkdown.rstudio.com.

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summary(cars)

##      speed           dist       
##  Min.   : 4.0   Min.   :  2.00  
##  1st Qu.:12.0   1st Qu.: 26.00  
##  Median :15.0   Median : 36.00  
##  Mean   :15.4   Mean   : 42.98  
##  3rd Qu.:19.0   3rd Qu.: 56.00  
##  Max.   :25.0   Max.   :120.00

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