Calculates the D-score and DAZ for each visit — calculate

The function draw_chart() plots individual data on the growth chart.

Usage

calculate_dscore(
  txt = "",
  session = "",
  format = "1.0",
  output = c("table", "last_visit", "last_dscore"),
  loc = "",
  ...
)

Arguments

txt: A JSON string, URL or file with the data in JSON format. The input data adhere to specification BDS JGZ 3.2.5, and are converted to JSON according to schema.
session: Alternative to txt. Session key where input data is uploaded on sitehost.
format: String. JSON data schema version number. There are currently three schemas supported: "1.0", "1.1", "2.0" and "3.0". Formats "1.0" and "1.1" are included for backward compatibility only. Use format = "3.0" for new applications.
output: A string, either "table", "last_visit" or '"last_dscore" specifying the result. The default "table" returns a table with four columns: "date", "x" (age), "y" (D-score) and "z" (DAZ). The number of rows equals to the number of visits. If output equals "last_visit" the function returns only the last row. If output equals "last_dscore" the function returns only the D-score from the last row.
loc: Alternative to txt. Location where input data is uploaded. Argument loc is deprecated and will disappear in Nov 2022; please use session instead.
...: Ignored

Value

A table, row or scalar.

Author

Stef van Buuren 2020

Examples

fn <- system.file("testdata", "Laura_S_dev.json", package = "james")
d <- calculate_dscore(txt = fn)
#> BDS 235 (Length/height in mm): has no value
#> BDS 245 (Body weight in grammes): has no value
#> BDS 252 (Head circumference in mm): has no value