cdcfluview/README.md

The CDC's FluView is a Flash portal and the only way to get flu season data is to use GUI controls, making it tedious to retrieve updates. This package uses the same API the portal does to programmatically retrieve data.

The following functions are implemented:

-   `get_flu_data` : retrieve flu data (national, by various region/sub-region types)
-   `get_state_data` : retrieve state-level flu data

The following data sets are included:

### News

-   Version 0.1 released
-   Version 0.2 releases : added state-level data retrieval

### Installation

``` r
devtools::install_github("hrbrmstr/cdcfluview")
```

### Usage

``` r
library(cdcfluview)
```

    ## Loading required package: httr

``` r
library(ggplot2)
library(dplyr)
```

    ## 
    ## Attaching package: 'dplyr'
    ## 
    ## The following object is masked from 'package:stats':
    ## 
    ##     filter
    ## 
    ## The following objects are masked from 'package:base':
    ## 
    ##     intersect, setdiff, setequal, union

``` r
library(statebins)
```

    ## Loading required package: grid
    ## Loading required package: scales
    ## Loading required package: gridExtra
    ## Loading required package: RColorBrewer

``` r
# current verison
packageVersion("cdcfluview")
```

    ## [1] '0.1'

``` r
flu <- get_flu_data("hhs", sub_region=1:10, "ilinet", years=2014)

state_flu <- get_state_data()

dplyr::glimpse(flu)
```

    ## Observations: 140
    ## Variables:
    ## $ REGION.TYPE       (chr) "HHS Regions", "HHS Regions", "HHS Regions", "HHS Regions", "HHS Regions", "HHS Regions",...
    ## $ REGION            (chr) "Region 1", "Region 2", "Region 3", "Region 4", "Region 5", "Region 6", "Region 7", "Regi...
    ## $ YEAR              (int) 2014, 2014, 2014, 2014, 2014, 2014, 2014, 2014, 2014, 2014, 2014, 2014, 2014, 2014, 2014,...
    ## $ WEEK              (int) 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 42, 42, 4...
    ## $ ILITOTAL          (int) 352, 2239, 1689, 1173, 1083, 1843, 217, 348, 1201, 61, 386, 2108, 1735, 1501, 1117, 2163,...
    ## $ TOTAL.PATIENTS    (int) 50896, 134096, 128589, 127408, 106896, 103717, 50032, 36991, 85312, 10868, 50711, 129275,...
    ## $ NUM..OF.PROVIDERS (int) 142, 253, 242, 299, 266, 236, 83, 117, 227, 53, 148, 242, 238, 305, 277, 246, 83, 114, 24...
    ## $ X..WEIGHTED.ILI   (dbl) 0.8825503, 1.8170454, 1.2055377, 0.8357537, 0.7384711, 1.8292926, 0.6895413, 0.6733888, 1...
    ## $ X.UNWEIGHTED.ILI  (dbl) 0.6916064, 1.6696993, 1.3134872, 0.9206643, 1.0131343, 1.7769507, 0.4337224, 0.9407694, 1...
    ## $ AGE.0.4           (int) 101, 872, 395, 330, 358, 465, 50, 82, 261, 22, 109, 837, 404, 353, 339, 560, 57, 58, 281,...
    ## $ AGE.5.24          (int) 185, 758, 627, 530, 400, 710, 97, 152, 532, 30, 199, 675, 664, 763, 443, 807, 124, 146, 5...
    ## $ AGE.25.64         (lgl) NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N...
    ## $ AGE.25.49         (int) 44, 351, 451, 187, 181, 469, 42, 87, 202, 7, 37, 338, 461, 248, 182, 509, 54, 87, 216, 20...
    ## $ AGE.50.64         (int) 13, 150, 126, 80, 80, 121, 15, 19, 101, 1, 24, 148, 131, 73, 105, 187, 17, 23, 117, 10, 2...
    ## $ AGE.65            (int) 9, 108, 90, 46, 64, 78, 13, 8, 105, 1, 17, 110, 75, 64, 48, 100, 11, 12, 97, 3, 8, 108, 8...

``` r
gg <- ggplot(flu, aes(x=WEEK, y=X..WEIGHTED.ILI, group=REGION))
gg <- gg + geom_line()
gg <- gg + facet_wrap(~REGION, ncol=2)
gg <- gg + theme_bw()
```

![](README_files/figure-markdown_github/unnamed-chunk-4-1.png)

``` r
gg_s <- state_flu %>%
  filter(WEEKEND=="Jan-03-2015") %>%
  select(state=STATENAME, value=ACTIVITY.LEVEL) %>%
  filter(!(state %in% c("Puerto Rico", "New York City"))) %>% # need to add PR to statebins
  mutate(value=as.numeric(gsub("Level ", "", value))) %>%
  statebins(brewer_pal="RdPu", breaks=4, 
            labels=c("Minimal", "Low", "Moderate", "High"),
            legend_position="bottom", legend_title="ILI Activity Level") +
  ggtitle("CDC State FluView (2014-01-03)")
```

![](README_files/figure-markdown_github/unnamed-chunk-6-1.png)

### Test Results

``` r
library(cdcfluview)
library(testthat)

date()
```

    ## [1] "Sun Jan 11 10:53:36 2015"

``` r
test_dir("tests/")
```

    ## basic functionality :