remove duplicated parameters

examples/scripts/gitt.py

@@ -4,9 +4,9 @@
 import pybop
 
 # Define model
-original_parameters = pybop.ParameterSet.pybamm("Xu2019")
+parameter_set = pybop.ParameterSet.pybamm("Xu2019")
 model = pybop.lithium_ion.SPM(
-    parameter_set=original_parameters, options={"working electrode": "positive"}
+    parameter_set=parameter_set, options={"working electrode": "positive"}
 )
 
 # Generate data
@@ -25,35 +25,12 @@
 )
 
 # Define parameter set
-parameter_set = pybamm.ParameterValues(
+parameter_set.update(
     {
         "Reference OCP [V]": 4.1821,
         "Derivative of the OCP wrt stoichiometry [V]": -1.38636,
-        "Current function [A]": original_parameters["Current function [A]"],
-        "Number of electrodes connected in parallel to make a cell": original_parameters[
-            "Number of electrodes connected in parallel to make a cell"
-        ],
-        "Electrode width [m]": original_parameters["Electrode width [m]"],
-        "Electrode height [m]": original_parameters["Electrode height [m]"],
-        "Positive electrode active material volume fraction": original_parameters[
-            "Positive electrode active material volume fraction"
-        ],
-        "Positive electrode porosity": original_parameters[
-            "Positive electrode porosity"
-        ],
-        "Positive particle radius [m]": original_parameters[
-            "Positive particle radius [m]"
-        ],
-        "Positive electrode thickness [m]": original_parameters[
-            "Positive electrode thickness [m]"
-        ],
-        "Positive electrode diffusivity [m2.s-1]": original_parameters[
-            "Positive electrode diffusivity [m2.s-1]"
-        ],
-        "Maximum concentration in positive electrode [mol.m-3]": original_parameters[
-            "Maximum concentration in positive electrode [mol.m-3]"
-        ],
-    }
+    },
+    check_already_exists=False,
 )
 
 # Define the cost to optimise