Roadmap Tutorial API's: XYGraph Axes etc Series Stats

TxyGraph 3.0 - using dates on the axes

When using ShowAsTime, real TDateTime values must be used for the axis values.

DateTickType values and their meaning:

Ticks will be drawn at the interval specified If AutoScaling is on, the graph will automatically scale to the first time point before data begins and the first after the data ends. Dateticktype will be automatically increased until the number of ticks is less than MaxTicks

dt_minute Ticks marked every minute
dt_5minute Ticks marked every 5 minutes, starting on the hour
dt_halfhourly Ticks marked every 30 minutes, starting on the hour
dt_hourly Ticks marked every hour
dt_daily marked every day, at midnight
dt_weekly Ticks marked every week, on Sunday (midnight)
dt_monthly Ticks marked every month, midnight on first/last day
dt_2monthly Ticks marked every second month, midnight on first/last day, 1 Jan, 1Mar .. etc
dt_quarterly Ticks marked every third month, midnight on first/last day, 1 Jan, 1Apr etc
dt_annually 1 Jan every Year
dt_decade 1 Jan every Year ending in 0 i.e. 1990
dt_century 1 Jan every Year ending in 00 i.e. 1900
dt_custom Ticks every period specified in StepSize