def _set(self, name, value):
"""
Set the value of an independent parameter and recompute dependents.
Parameters::
name --
The name of the parameter to set.
Type: string
value --
The new parameter value.
Type: float
Raises::
XMLException if name not present in model or if variable is not an
independent parameter.
"""
try:
variable = self.ocp.variable(name)
except RuntimeError:
raise XMLException("Could not find variable: " + name)
if variable.getVariability() != casadi.PARAMETER:
raise XMLException(name + " is not a parameter.")
if variable.getFree():
raise XMLException(name + " is a free parameter.")
if variable.getCategory() == casadi.CAT_DEPENDENT_PARAMETER:
raise XMLException(name + " is a dependent parameter.")
variable.setStart(value)
def _get(self, name):
"""
Get the value of a non-free parameter or a constant.
Parameters::
name --
The name of the parameter or constant to get.
Type: string
Returns::
value --
Parameter or constant value.
Type: float
Raises::
XMLException if name not present in model or if variable is not a
non-free parameter or a constant.
Example::
CasadiModel.get('damper.d')
CasadiModel.get(['damper.d', 'gear.a'])
"""
try:
variable = self.ocp.variable(name)
except RuntimeError:
raise XMLException("Could not find variable: " + name)
if (variable.getVariability() != casadi.PARAMETER and
variable.getVariability() != casadi.CONSTANT):
raise XMLException(name + " is neither a parameter nor a " +
"constant.")
if variable.getFree():
raise XMLException(name + " is a free parameter.")
return variable.getStart()
def _set_nominal(self, name, value):
"""
Set the nominal value of a variable.
Parameters::
name --
The names of the variable to set a new nominal value for.
Type: string
value --
The new nominal value.
Type: float
Raises::
XMLException if name not present in model.
"""
try:
variable = self.ocp.variable(name)
except RuntimeError:
raise XMLException("Could not find variable: " + name)
variable.setNominal(value)