Returns the display mode of the selected trend pen. The display mode is set using TrnSetDisplayMode.
The AN of the chosen trend.
The trend pen number:
0 - The pen currently in focus.
1...8 - Pen1. . .Pen8.
An integer representing the trend's display mode:
Invalid/Gated trend options:
0 - Convert invalid/gated trend samples to zero.
1 - Leave invalid/gated trend samples as they are.
Ordering trend sample options:
0 - Order returned trend samples from oldest to newest.
2 - Order returned trend samples from newest to oldest.
Condense method options:
0 - Set the condense method to use the mean of the samples.
4 - Set the condense method to use the minimum of the samples.
8 - Set the condense method to use the maximum of the samples.
12 - Set the condense method to use the newest of the samples.
Stretch method options:
0 - Set the stretch method to step.
128 - Set the stretch method to use a ratio.
256 - Set the stretch method to use raw samples.
Gap Fill Constant option:
n - the number of missed samples that the user wants to gap fill) x 4096.
Display as Periodic options:
0 - Display according to trend type.
1048576 - display as periodic regardless of trend type.
int DisplayMode = TrnGetDisplayMode (10, 7)
/* Returns The Display Mode of pen 7 for the trend at AN 10.*/