Scales are found in charts displayed with GraphApplet and ScatterApplet. However, the way
Scale objects are accessed is a bit different. When using GraphApplet, a scale is accessed through the
graphset it belongs to. The name of any scale parameter is always prefixed by 'graphset' and respective id
number. ScatterApplet does not implement graphsets, therefore the name of scale parameters is not
prefixed.
By default the minimum, maximum and increment values of a scale are automatically calculated. The minimum and
maximum values are calculated with respect to the minimum and maximum values of all series belonging to a
graphset or directly added to ScatterApplet, and the increment is calculated in such a way that a scale labels do not overlap
each other. If all series values are larger than or equal to zero, the minimum value is always zero.
An automatic scale might not be suitable in certain conditions. For instance, if a line series is assigned values of
large magnitude, and these values do not vary intensively, a vertical chart displays a horizontal line next to the scale
top and slightly jagged, in which case it is not possible to distinguish and analyze data evolution. So, it is necessary
to manually set scale properties, adjusting the minimum, maximum and increment values to make the scale range
suitable for visualizing data variation. The example below displays an area series with large values ranging between
20000 and 20010. The scale was configured to facilitate data visualization.