ChartDirector 7.1 (C++ Edition)
XYChart.setTrimData
Usage
void setTrimData(int startPos, int len = 0x7fffffff);
Description
Uses only a subset of the data series to draw charts.
In finance charts, "lead data" are commonly needed to plot technical indicators. For example, to show a 20-days moving average line for 30 days, one needs 50 days of data. It is because computing 20-days moving average requires 20 days of "lead data". The setTrimData method is a convenience method for trimming off these "lead data" so they will not appear on the chart.
Arguments
| Argument | Default | Description |
| startPos | (Mandatory) | The index for the first data position to use for plotting charts. |
| len | 7fffffff | The length of the data points used for plotting charts. |
Return Value
None
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