dataframe2zoo: Extract ZOO Time Series of Cases from a Tycho 2.0 dataframe

In allopole/tycho2: Interface to the Project Tycho 2.0 database

Description

extractzoo and tycho2zoo extracts regular time series of class zooreg from a dataframe or tibble.

Usage

dataframe2zoo(dataset, index, data, FUN = "sum")

tycho2zoo(dataset, index = "PeriodEndDate", data = "CountValue",
  FUN = "sum")

Arguments

dataset	Data Frame or Tibble with at least one variabel of class Date, POSIXct or POSIXlt.
index	Character. Name of variable to use as index. Variable must be of class Date, POSIXct or POSIXlt
data	Character. Name of variable to use as data.
FUN	Name of function to use for aggregation. May be quoted or not. Default = sum

Details

extractzoo aggregates the data by summing for each unique value of index, calculates the underlying time interval of the data, pads missing data with NA's, and returns a regular time series (numeric vector) of class zooreg. See zooreg for details.

tycho2zoo is a convenience wrapper for extractzoo with default values index = "PeriodEndDate" and data = "CountValue".

Value

A regular time series of class zooreg.

Examples

mydata <- data.frame(date = as.Date(c("2000/1/1",
                                          "2000/1/1",
                                          "2000/1/8",
                                          "2000/1/22",
                                          "2000/1/29",
                                          "2000/1/29")),
                         city = c("NY","BOS","NY","NY","BOS","NY"),
                         temp = c(2.0, 0.5, 5.5, 3.8, 7.1, 9.0))
mydata
meantemp <- dataframe2zoo(mydata, index="date", data="temp", FUN=mean)
meantemp

allopole/tycho2 documentation built on Dec. 26, 2019, 2:48 a.m.