Bob Rudis
7 years ago
14 changed files with 172 additions and 165 deletions
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# Generated by roxygen2 (4.1.0.9000): do not edit by hand |
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# Generated by roxygen2 (4.1.1): do not edit by hand |
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export(get_flu_data) |
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export(get_state_data) |
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import(httr) |
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import(pbapply) |
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#' Retrieves the state-level data from the CDC's FluView Portal |
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#' |
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#' Uses the data source from the CDC' State-levelFluView \url{http://gis.cdc.gov/grasp/fluview/main.html} |
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#' and provides state flu reporting data as a single data frame |
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#' |
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#' @param years a vector of years to retrieve data for (i.e. \code{2014} for CDC flu season 2014-2015) |
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#' @return A \code{data.frame} of state-level data for the specified seasons |
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#' @export |
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#' @examples \dontrun{ |
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#' get_state_dat(2014) |
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#' get_state_data(c(2013, 2014)) |
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#' } |
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get_state_data <- function(years=2014) { |
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if (any(years < 1997)) |
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stop("Error: years should be > 1997") |
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years <- years - 1960 |
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out_file <- tempfile(fileext=".zip") |
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params <- list(EndMMWRID=0, |
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StartMMWRID=0, |
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QueryType=1, |
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DataMode="STATE", |
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SeasonsList=paste0(years, collapse=",")) |
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tmp <- POST("http://gis.cdc.gov/grasp/fluview/FluViewPhase1CustomDownload.ashx", |
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body=params, |
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write_disk(out_file)) |
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stop_for_status(tmp) |
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if (!(file.exists(out_file))) |
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stop("Error: cannot process downloaded data") |
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out_dir <- tempdir() |
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files <- unzip(out_file, exdir=out_dir, overwrite=TRUE) |
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read.csv(files, header=TRUE, stringsAsFactors=FALSE) |
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} |
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