TimeHistoryGF outputs a time-dependent gwoom Grid< float > given an input signal array sa having dimension (nx,ny,nt) and corresponding time vector tv with dimension (nt). The output grid is chosen based on the current time; if the current time falls between two times in the time vector, the output grid is chosen by interpolating (on a pixel-by-pixel basis) the input signal array (if sampleFlag = 0), or by sample-and-hold (if sampleFlag != 0). The parameter t0 defines the start time in the time vector, so that at simulation time t = 0.0 s, the output grid will be that for tv = t0. Also, the input time vector may be defined such that the time history does not begin until t > 0.0 s, and in prior times the initial grid s0 is used. If the time vector ends before the end of the simulation, the last grid is held throughout the remainder of the simulation.

Parameters
tv	Vector<double>	Time vector, length nt (s)	Vector()
sa	Array<float>	Signal array (nx,ny,nt)	Array()
dxy	float	Grid spacing for output grid (m)	0.1
t0	double	The time within the tv vector that is to correspond to simulation time t=0.0 (s)	0.0
s0	Grid<float>	Default signal grid before initial time	uniformGrid(0.0)
sampleFlag	int	Sample flag (0 = interpolate; 1 = sample and hold)	0
Inputs
None
Outputs
s	Grid<float>	Output signal grid (nx,ny)	Grid()
Subsystems
Last Saved: Wed Feb 13 11:46:21 MST 2008 by TVE version 2007B