Graphs with Stage or Platform Axes

The Stage and Platform axis types are used to plot data values versus group and index in a three-dimensional representation.

• The default style, CX_AXIS_STAGE_SW, displays data values along a vertical y-axis, versus index along the x-axis, and group along the z-axis from a south-western perspective.

• CX_AXIS_STAGE_SE displays the same data from a south-eastern direction.

• The platform axes, CX_AXIS_PLATFORM_SW and CX_AXIS_PLATFORM_SE, do not draw the Y-X or Y-Z axes and grid lines—only the labels are drawn.

The vertical data axis (Y) is defined by an SRGDecimalScale object (or SRGLogScale for logarithmic scaling, or SRGDateScale for date/time values). The two horizontal axes (X and Z) are defined by SRGIndexScale. The annotations from the data values (indices) in group 0 are used to label the X axis, and the group headers label the Z axis.

The methods described above for changing the scaling and appearance of Classic axes also apply here. The view angle for these axis types is fixed and can not be easily changed.

The Manhattan, Rooftop, and Ribbon graph types use the stage and platform axes and are described in the following subsections.

An IsoBar or Manhattan graph represents data values as a three-dimensional rectangle. The data value is plotted against both its group and index. The resulting chart resembles the Manhattan skyline.

The appearance of the bars is determined by the settings in the style member of the individual data items. If the interior and frame styles of a data item are set to NONE, the style of the first group (SRGraphDataList object) is used.

Because negative values can not be represented, a standard bar chart is drawn if the data contain negative values.

Stage or Platform Axis. One group per series.

An IsoArea or Roof Top graph is similar to an IsoBar graph except the roof top between data values comprises sloped surfaces rather than steps. No lines are drawn to separate the indices.

The appearance of each group is determined by the group’s style object. Because negative values can not be represented, a standard bar chart is drawn if the data contain negative values.

Stage or Platform Axis. One group per series.

A Ribbon graph is similar to an IsoArea graph except just the roof top is drawn, without any sides.