add(series, data, index)

function

Writes data to the chart. series is the index of the data series (integer); data is the data to write (array), for example [1574993606000, 13.5]; the optional index selects the data point to modify, negative values allowed, -1 being the last point; without it the data is appended to the series. For example, to modify the last point of series[0]: chart.add(0, [1574993606000, 13.5], -1). In Rust it is add(series, data_json, index) and index is required; a value below 0 appends.

update(options)

function

Replaces the current configuration with a new chart configuration (same as the Chart() argument). Charts without a time axis (for example pie) are updated by passing the whole configuration to update().

reset(remain)

function

Clears the chart data; remain is the number of data points to keep, all are cleared when omitted.

del(series)

function

Deletes the data series at the given index; with an argument of 0 or less, or none, the whole chart (including its configuration) is deleted. In Python the method is named dell() (del is a keyword); Rust has no such method.