To & From JSON

Get JSON options from an echarts4r object and build one from JSON.

Usage

e_inspect(e, json = FALSE, ...)

echarts_from_json(txt, jswrapper = FALSE)

Arguments

e

An echarts4r object as returned by e_charts or a proxy as returned by echarts4rProxy.

json

Whether to return the JSON, otherwise returns a list.

...

Additional options to pass to toJSON.

txt

JSON character string, url, or file.

jswrapper

Whether to wrap pure JS functions in htmlwidgets::JS, Default is FALSE.

Value

e_inspect Returns a list if json is FALSE and a JSON string otherwise. echarts_from_json returns an object of class echarts4r.

Details

txt should contain the full list of options required to build a chart. This is subsequently passed to the setOption ECharts (JavaScript) function.

Note

Must be passed as last option.

Examples

p <- cars |>
  e_charts(dist) |>
  e_scatter(speed, symbol_size = 10)

p # plot


# extract the JSON
json <- p |>
  e_inspect(
    json = TRUE,
    pretty = TRUE
  )

# print json
json
#> {
#>   "yAxis": [
#>     {
#>       "show": true
#>     }
#>   ],
#>   "xAxis": [
#>     {
#>       "type": "value"
#>     }
#>   ],
#>   "legend": {
#>     "data": [
#>       "speed"
#>     ]
#>   },
#>   "series": [
#>     {
#>       "data": [
#>         {
#>           "value": [2, 4]
#>         },
#>         {
#>           "value": [4, 7]
#>         },
#>         {
#>           "value": [10, 4]
#>         },
#>         {
#>           "value": [10, 9]
#>         },
#>         {
#>           "value": [14, 12]
#>         },
#>         {
#>           "value": [16, 8]
#>         },
#>         {
#>           "value": [17, 11]
#>         },
#>         {
#>           "value": [18, 10]
#>         },
#>         {
#>           "value": [20, 12]
#>         },
#>         {
#>           "value": [20, 15]
#>         },
#>         {
#>           "value": [22, 7]
#>         },
#>         {
#>           "value": [24, 12]
#>         },
#>         {
#>           "value": [26, 10]
#>         },
#>         {
#>           "value": [26, 13]
#>         },
#>         {
#>           "value": [26, 14]
#>         },
#>         {
#>           "value": [26, 15]
#>         },
#>         {
#>           "value": [28, 11]
#>         },
#>         {
#>           "value": [28, 12]
#>         },
#>         {
#>           "value": [32, 16]
#>         },
#>         {
#>           "value": [32, 17]
#>         },
#>         {
#>           "value": [32, 20]
#>         },
#>         {
#>           "value": [34, 10]
#>         },
#>         {
#>           "value": [34, 13]
#>         },
#>         {
#>           "value": [34, 13]
#>         },
#>         {
#>           "value": [36, 14]
#>         },
#>         {
#>           "value": [36, 19]
#>         },
#>         {
#>           "value": [40, 16]
#>         },
#>         {
#>           "value": [40, 17]
#>         },
#>         {
#>           "value": [42, 18]
#>         },
#>         {
#>           "value": [46, 13]
#>         },
#>         {
#>           "value": [46, 19]
#>         },
#>         {
#>           "value": [48, 20]
#>         },
#>         {
#>           "value": [50, 17]
#>         },
#>         {
#>           "value": [52, 20]
#>         },
#>         {
#>           "value": [54, 15]
#>         },
#>         {
#>           "value": [54, 23]
#>         },
#>         {
#>           "value": [56, 18]
#>         },
#>         {
#>           "value": [56, 20]
#>         },
#>         {
#>           "value": [60, 14]
#>         },
#>         {
#>           "value": [64, 20]
#>         },
#>         {
#>           "value": [66, 22]
#>         },
#>         {
#>           "value": [68, 19]
#>         },
#>         {
#>           "value": [70, 24]
#>         },
#>         {
#>           "value": [76, 18]
#>         },
#>         {
#>           "value": [80, 14]
#>         },
#>         {
#>           "value": [84, 18]
#>         },
#>         {
#>           "value": [85, 25]
#>         },
#>         {
#>           "value": [92, 24]
#>         },
#>         {
#>           "value": [93, 24]
#>         },
#>         {
#>           "value": [120, 24]
#>         }
#>       ],
#>       "name": "speed",
#>       "type": "scatter",
#>       "symbol": null,
#>       "coordinateSystem": "cartesian2d",
#>       "yAxisIndex": 0,
#>       "xAxisIndex": 0,
#>       "symbolSize": 10
#>     }
#>   ]
#> } 

# rebuild plot
echarts_from_json(json) |>
  e_theme("dark") # modify