For Vega and Vega-Lite, the translation between lists and JSON is a little bit particular. This function, vw_as_json(), can be used to translate to JSON; as_vegaspec() can be used to translate from JSON.

vw_as_json(spec, pretty = TRUE)

Arguments

spec

An object to be coerced to vegaspec, a Vega/Vega-Lite specification

pretty

logical indicates to use pretty (vs. minified) formatting

Value

jsonlite::json object

See also

Examples

vw_as_json(spec_mtcars)
#> { #> "$schema": "https://vega.github.io/schema/vega-lite/v4.json", #> "width": 300, #> "height": 300, #> "description": "An mtcars example.", #> "data": { #> "values": [ #> { #> "mpg": 21, #> "cyl": 6, #> "disp": 160, #> "hp": 110, #> "drat": 3.9, #> "wt": 2.62, #> "qsec": 16.46, #> "vs": 0, #> "am": 1, #> "gear": 4, #> "carb": 4, #> "_row": "Mazda RX4" #> }, #> { #> "mpg": 21, #> "cyl": 6, #> "disp": 160, #> "hp": 110, #> "drat": 3.9, #> "wt": 2.875, #> "qsec": 17.02, #> "vs": 0, #> "am": 1, #> "gear": 4, #> "carb": 4, #> "_row": "Mazda RX4 Wag" #> }, #> { #> "mpg": 22.8, #> "cyl": 4, #> "disp": 108, #> "hp": 93, #> "drat": 3.85, #> "wt": 2.32, #> "qsec": 18.61, #> "vs": 1, #> "am": 1, #> "gear": 4, #> "carb": 1, #> "_row": "Datsun 710" #> }, #> { #> "mpg": 21.4, #> "cyl": 6, #> "disp": 258, #> "hp": 110, #> "drat": 3.08, #> "wt": 3.215, #> "qsec": 19.44, #> "vs": 1, #> "am": 0, #> "gear": 3, #> "carb": 1, #> "_row": "Hornet 4 Drive" #> }, #> { #> "mpg": 18.7, #> "cyl": 8, #> "disp": 360, #> "hp": 175, #> "drat": 3.15, #> "wt": 3.44, #> "qsec": 17.02, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 2, #> "_row": "Hornet Sportabout" #> }, #> { #> "mpg": 18.1, #> "cyl": 6, #> "disp": 225, #> "hp": 105, #> "drat": 2.76, #> "wt": 3.46, #> "qsec": 20.22, #> "vs": 1, #> "am": 0, #> "gear": 3, #> "carb": 1, #> "_row": "Valiant" #> }, #> { #> "mpg": 14.3, #> "cyl": 8, #> "disp": 360, #> "hp": 245, #> "drat": 3.21, #> "wt": 3.57, #> "qsec": 15.84, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 4, #> "_row": "Duster 360" #> }, #> { #> "mpg": 24.4, #> "cyl": 4, #> "disp": 146.7, #> "hp": 62, #> "drat": 3.69, #> "wt": 3.19, #> "qsec": 20, #> "vs": 1, #> "am": 0, #> "gear": 4, #> "carb": 2, #> "_row": "Merc 240D" #> }, #> { #> "mpg": 22.8, #> "cyl": 4, #> "disp": 140.8, #> "hp": 95, #> "drat": 3.92, #> "wt": 3.15, #> "qsec": 22.9, #> "vs": 1, #> "am": 0, #> "gear": 4, #> "carb": 2, #> "_row": "Merc 230" #> }, #> { #> "mpg": 19.2, #> "cyl": 6, #> "disp": 167.6, #> "hp": 123, #> "drat": 3.92, #> "wt": 3.44, #> "qsec": 18.3, #> "vs": 1, #> "am": 0, #> "gear": 4, #> "carb": 4, #> "_row": "Merc 280" #> }, #> { #> "mpg": 17.8, #> "cyl": 6, #> "disp": 167.6, #> "hp": 123, #> "drat": 3.92, #> "wt": 3.44, #> "qsec": 18.9, #> "vs": 1, #> "am": 0, #> "gear": 4, #> "carb": 4, #> "_row": "Merc 280C" #> }, #> { #> "mpg": 16.4, #> "cyl": 8, #> "disp": 275.8, #> "hp": 180, #> "drat": 3.07, #> "wt": 4.07, #> "qsec": 17.4, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 3, #> "_row": "Merc 450SE" #> }, #> { #> "mpg": 17.3, #> "cyl": 8, #> "disp": 275.8, #> "hp": 180, #> "drat": 3.07, #> "wt": 3.73, #> "qsec": 17.6, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 3, #> "_row": "Merc 450SL" #> }, #> { #> "mpg": 15.2, #> "cyl": 8, #> "disp": 275.8, #> "hp": 180, #> "drat": 3.07, #> "wt": 3.78, #> "qsec": 18, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 3, #> "_row": "Merc 450SLC" #> }, #> { #> "mpg": 10.4, #> "cyl": 8, #> "disp": 472, #> "hp": 205, #> "drat": 2.93, #> "wt": 5.25, #> "qsec": 17.98, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 4, #> "_row": "Cadillac Fleetwood" #> }, #> { #> "mpg": 10.4, #> "cyl": 8, #> "disp": 460, #> "hp": 215, #> "drat": 3, #> "wt": 5.424, #> "qsec": 17.82, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 4, #> "_row": "Lincoln Continental" #> }, #> { #> "mpg": 14.7, #> "cyl": 8, #> "disp": 440, #> "hp": 230, #> "drat": 3.23, #> "wt": 5.345, #> "qsec": 17.42, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 4, #> "_row": "Chrysler Imperial" #> }, #> { #> "mpg": 32.4, #> "cyl": 4, #> "disp": 78.7, #> "hp": 66, #> "drat": 4.08, #> "wt": 2.2, #> "qsec": 19.47, #> "vs": 1, #> "am": 1, #> "gear": 4, #> "carb": 1, #> "_row": "Fiat 128" #> }, #> { #> "mpg": 30.4, #> "cyl": 4, #> "disp": 75.7, #> "hp": 52, #> "drat": 4.93, #> "wt": 1.615, #> "qsec": 18.52, #> "vs": 1, #> "am": 1, #> "gear": 4, #> "carb": 2, #> "_row": "Honda Civic" #> }, #> { #> "mpg": 33.9, #> "cyl": 4, #> "disp": 71.1, #> "hp": 65, #> "drat": 4.22, #> "wt": 1.835, #> "qsec": 19.9, #> "vs": 1, #> "am": 1, #> "gear": 4, #> "carb": 1, #> "_row": "Toyota Corolla" #> }, #> { #> "mpg": 21.5, #> "cyl": 4, #> "disp": 120.1, #> "hp": 97, #> "drat": 3.7, #> "wt": 2.465, #> "qsec": 20.01, #> "vs": 1, #> "am": 0, #> "gear": 3, #> "carb": 1, #> "_row": "Toyota Corona" #> }, #> { #> "mpg": 15.5, #> "cyl": 8, #> "disp": 318, #> "hp": 150, #> "drat": 2.76, #> "wt": 3.52, #> "qsec": 16.87, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 2, #> "_row": "Dodge Challenger" #> }, #> { #> "mpg": 15.2, #> "cyl": 8, #> "disp": 304, #> "hp": 150, #> "drat": 3.15, #> "wt": 3.435, #> "qsec": 17.3, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 2, #> "_row": "AMC Javelin" #> }, #> { #> "mpg": 13.3, #> "cyl": 8, #> "disp": 350, #> "hp": 245, #> "drat": 3.73, #> "wt": 3.84, #> "qsec": 15.41, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 4, #> "_row": "Camaro Z28" #> }, #> { #> "mpg": 19.2, #> "cyl": 8, #> "disp": 400, #> "hp": 175, #> "drat": 3.08, #> "wt": 3.845, #> "qsec": 17.05, #> "vs": 0, #> "am": 0, #> "gear": 3, #> "carb": 2, #> "_row": "Pontiac Firebird" #> }, #> { #> "mpg": 27.3, #> "cyl": 4, #> "disp": 79, #> "hp": 66, #> "drat": 4.08, #> "wt": 1.935, #> "qsec": 18.9, #> "vs": 1, #> "am": 1, #> "gear": 4, #> "carb": 1, #> "_row": "Fiat X1-9" #> }, #> { #> "mpg": 26, #> "cyl": 4, #> "disp": 120.3, #> "hp": 91, #> "drat": 4.43, #> "wt": 2.14, #> "qsec": 16.7, #> "vs": 0, #> "am": 1, #> "gear": 5, #> "carb": 2, #> "_row": "Porsche 914-2" #> }, #> { #> "mpg": 30.4, #> "cyl": 4, #> "disp": 95.1, #> "hp": 113, #> "drat": 3.77, #> "wt": 1.513, #> "qsec": 16.9, #> "vs": 1, #> "am": 1, #> "gear": 5, #> "carb": 2, #> "_row": "Lotus Europa" #> }, #> { #> "mpg": 15.8, #> "cyl": 8, #> "disp": 351, #> "hp": 264, #> "drat": 4.22, #> "wt": 3.17, #> "qsec": 14.5, #> "vs": 0, #> "am": 1, #> "gear": 5, #> "carb": 4, #> "_row": "Ford Pantera L" #> }, #> { #> "mpg": 19.7, #> "cyl": 6, #> "disp": 145, #> "hp": 175, #> "drat": 3.62, #> "wt": 2.77, #> "qsec": 15.5, #> "vs": 0, #> "am": 1, #> "gear": 5, #> "carb": 6, #> "_row": "Ferrari Dino" #> }, #> { #> "mpg": 15, #> "cyl": 8, #> "disp": 301, #> "hp": 335, #> "drat": 3.54, #> "wt": 3.57, #> "qsec": 14.6, #> "vs": 0, #> "am": 1, #> "gear": 5, #> "carb": 8, #> "_row": "Maserati Bora" #> }, #> { #> "mpg": 21.4, #> "cyl": 4, #> "disp": 121, #> "hp": 109, #> "drat": 4.11, #> "wt": 2.78, #> "qsec": 18.6, #> "vs": 1, #> "am": 1, #> "gear": 4, #> "carb": 2, #> "_row": "Volvo 142E" #> } #> ] #> }, #> "mark": "point", #> "encoding": { #> "x": { #> "field": "wt", #> "type": "quantitative" #> }, #> "y": { #> "field": "mpg", #> "type": "quantitative" #> }, #> "color": { #> "field": "cyl", #> "type": "nominal" #> } #> } #> }