JavaScript/jQuery Chart - dataPrepareSettings

Processes data before visualizing it.

Type:

Object

checkTypeForAllData

Validates the type of each value coming from the data source.

Type:

Boolean

Default Value: false

Use this option when values in your data source are of a different type, and you need all of them to be visualized on a single axis.

If this option is set to true, the type of each value is checked, and the axis type is chosen optimally to display all the values. Otherwise, only the type of the first value is checked, and the axis type is chosen according to the type of this value. In this case, the values that cannot be cast to a data type supported by the axis will be ignored.

NOTE
Because the type check affects widget performance, keep this option set to false when you have a vast data source with values of the same type, and this type is known beforehand.
See Also
  • argumentAxis.argumentType - casts arguments to a specified data type.
  • valueAxis.valueType - casts values to a specified data type.

convertToAxisDataType

Converts data coming from a data source into a data type supported by the axis.

Type:

Boolean

Default Value: true

If this option is set to true, all data will be converted into a data type supported by the axis. You can specify this data type using the argumentAxis.argumentType and valueAxis.valueType options. Otherwise, it will be determined automatically on the base of the first data source value.

NOTE
We recommend you to keep this option set to true in order to prevent the chart from behaving incorrectly. However, since the type conversion affects widget performance, it may be useful to set this option to false if you have a vast data source with values of the same type, and this type is known beforehand.

sortingMethod

Specifies the sorting order in which series points should be drawn.

Type:

Boolean

|

Function

Function parameters:
a:

Object

A data source object to be compared.

b:

Object

A data source object to be compared.

Return Value:

Number

Specifies whether a goes before b.

Default Value: true

When this option is set to true, the series points are drawn in order of increasing argument. Otherwise, the order of drawing the series points is the same as the order of objects in the data source.

NOTE
We recommend setting this option to false if objects in the data source are already sorted properly. This will improve widget performance.

Alternatively, you can specify the drawing order using a comparison function. It accepts two data source objects and should return the value on which the order will depend. For example, assume that A and B objects represent two series points. If the function returns a value less than 0, point A will be drawn before point B. If the function returns a value greater than 0, point A will be drawn after point B. If the function returns 0, the drawing order of A and B remains unchanged.

NOTE
When the argumentType is 'string', the sortingMethod option does not accept Boolean values. However, you can still apply sorting using a comparison function. Alternatively, use the categories array to perform the same task. Note that the categories array takes precedence over the sortingMethod function.