Printac - print AUTO constant.

Printac prints the value of the specified AUTO constant on screen.

Usage

printac [-h] (run$\mathrm \vert$rfile$\mathrm \vert$-) ac_name

Switches

-h

:

Display a usage message and exit with nonzero return value.

Arguments

	run		:		Read constants of run with qualified run name run.
	rfile		:		Read constants from r.*-file rfile.
	-		:		Read constants from standard input.
	ac_name		:		NDIM $\mathrm \vert$ NTST $\mathrm \vert$ NCOL $\mathrm \vert$ NMX $\mathrm \vert$ NPR $\mathrm \vert$ RL0 $\mathrm \vert$ RL1 $\mathrm \vert$ A0 $\mathrm \vert$ A1
			$\mathrm \vert$		EPSL $\mathrm \vert$ EPSU $\mathrm \vert$ EPSS $\mathrm \vert$ DS $\mathrm \vert$ DSMIN $\mathrm \vert$ DSMAX

Detailed description

Printac prints on screen the value that was assigned to an AUTO constant during the run with qualified run name run. This might be useful for initializing certain computations, for example, if you want to compute a cascade of period-doubling bifurcations. If you use the bash, then a command like

	rauto name run rrun -IRS $(splabs rrun PD 1 1) \
	-NTST $(( $(printac rrun NTST)*2 )) -ISW -1 ...

will initialize the computation of a doubled solution with twice the number of mesh points of the single solution. Note that you might also want to decrease the initial step size. You need to use the desktop calculator dc for that (again bash notation):

	h0=$(printac rrun DS)
	h0=$(dc -e "8 k 0 1 $h0 * 4.67 / p")
	rauto ... -DS $h0 ...

Set DSMIN to a sufficiently small value. Note that we have to go to some length here to deal with negative values of DS.

Return values

Printac returns 0 on success and 1 if an error occurred or the -h switch was given.