Time series data
시계열 데이터 (ts)
co2 {datasets}
1959~1997년까지(39년간) 월별 CO2농도 468개 (from Mauna Loa observatory )
R
sunspots {datasets}
https://stat.ethz.ch/R-manual/R-devel/library/datasets/html/sunspot.month.html
흑점 갯수의 월별평균값 1749–1983
R
AirPassengers {datasets}
R
R
TS => Data.table
from co2 (using zoo)
http:// Heading https://www.rdocumentation.org/packages/zoo/versions/1.8-6
co2 %>% time() %>% as.yearmon() %>% as.Date() %>% class
R
from AirPassengers (using broom)
broom::tidy.ts (fortify) 로 data.frame형태로 변경가능
https://cran.r-project.org/web/packages/broom/vignettes/broom.html
https://ggplot2.tidyverse.org/reference/fortify.html
fortify()대신 broom의 tidy()사용
R
ggfortyfy는 ggplot2::autoplot()를 이용해서 ts object를 그릴수 있도록 도와준다.
R
Data.table => Xts
co2ts (from co2new)
최근 Full data from Earth System Research Laboratory
R
R
ts object 만들기
- index : Index (i.e. date or time) for the “ts” object.
- series : Name of the series (multivariate “ts” objects only).
- value : Value of the observation.
R
Airline Flights From NYC
nycflights13
2013년 New York를 출발한 항공데이터
R
numeric => Data.table (with Index)
river ( Index가 없는 Single Numeric)
R
from Web Data
GDP Growth Data
R
example
https://www.neonscience.org/dc-convert-date-time-POSIX-r
R
R
R