Numeric::Interpolator::Linear
src/Numeric/Interpolator/Linear.H
This is a general-purpose routine for specifying time-interpolated quantities in an input file. Interpolators obey the following syntax:
(t1,t2,..,tn;v1,v2,...,vn)
where tn are times and vn are values at those times.
Note: do not include whitespace in an interpolator, this will mess with the parser.
Interpolators can usually be used in place of regular numbers, but only when supported by the calling parse function.
For instance, the BC::Operator::Elastic::TensionTest allows the user to specify fixed displacement; for instance, to specify a value of 0.1:
bc.tenstion_test.disp = 0.1
However, it may be desirable to change the value over time. In this case, one may specify an interpolator string instead:
bc.tenstion_test.disp = (1.0,1.5,2.0;0.0,0.1,0.0)
This will cause the displacement value to be zero for t<1.0;
ramp to 0.1 as 1.0<t<2.0;
ramp back to 0.0 as 2.0<t<3.0;
and then remain at the constant value of 3.0 for t>3.0.
str
Interpolator string used when Parsed from queryclass.
Names by executable 2 executables, 4 uses
L.str
lambda.str
L.str
lambda.str