refactor: change start values as guesses rather than default values for RealInput/Output/Array

Author: Sathvik Bhagavan

src/Blocks/utils.jl

@@ -1,38 +1,38 @@
 @connector function RealInput(; name, nin = 1, u_start = nin > 1 ? zeros(nin) : 0.0)
     nin > 1 && @warn "For inputs greater than one, use `RealInputArray`."
     if nin == 1
-        @variables u(t)=u_start [
+        @variables u(t) [
             input = true,
             description = "Inner variable in RealInput $name"
         ]
     else
-        @variables u(t)[1:nin]=u_start [
+        @variables u(t)[1:nin] [
             input = true,
             description = "Inner variable in RealInput $name"
         ]
         u = collect(u)
     end
-    ODESystem(Equation[], t, [u...], []; name = name)
+    ODESystem(Equation[], t, [u...], []; name = name, guesses = [u => u_start])
 end
 @doc """
     RealInput(;name, u_start)
 
 Connector with one input signal of type Real.
 
 # Parameters:
-- `u_start=0`: Initial value for `u`.
+- `u_start=0`: Guess value for `u`.
 
 # States:
 - `u`: Value of the connector which is a scalar.
 """ RealInput
 
 @connector function RealInputArray(; name, nin = 2, u_start = zeros(nin))
-    @variables u(t)[1:nin]=u_start [
+    @variables u(t)[1:nin] [
         input = true,
         description = "Inner variable in RealInputArray $name"
     ]
     u = collect(u)
-    ODESystem(Equation[], t, [u...], []; name = name)
+    ODESystem(Equation[], t, [u...], []; name = name, guesses = [u => u_start])
 end
 @doc """
     RealInputArray(;name, nin, u_start)
@@ -41,7 +41,7 @@ Connector with an array of input signals of type Real.
 
 # Parameters:
 - `nin=2`: Number of inputs.
-- `u_start=zeros(nin)`: Initial value for `u`.
+- `u_start=zeros(nin)`: Guess value for `u`.
 
 # States:
 - `u`: Value of the connector which is an array.
@@ -50,38 +50,38 @@ Connector with an array of input signals of type Real.
 @connector function RealOutput(; name, nout = 1, u_start = nout > 1 ? zeros(nout) : 0.0)
     nout > 1 && @warn "For outputs greater than one, use `RealOutputArray`."
     if nout == 1
-        @variables u(t)=u_start [
+        @variables u(t) [
             output = true,
             description = "Inner variable in RealOutput $name"
         ]
     else
-        @variables u(t)[1:nout]=u_start [
+        @variables u(t)[1:nout] [
             output = true,
             description = "Inner variable in RealOutput $name"
         ]
         u = collect(u)
     end
-    ODESystem(Equation[], t, [u...], []; name = name)
+    ODESystem(Equation[], t, [u...], []; name = name, guesses = [u => u_start])
 end
 @doc """
     RealOutput(;name, u_start)
 
 Connector with one output signal of type Real.
 
 # Parameters:
-- `u_start=0`: Initial value for `u`.
+- `u_start=0`: Guess value for `u`.
 
 # States:
 - `u`: Value of the connector which is a scalar.
 """ RealOutput
 
 @connector function RealOutputArray(; name, nout = 2, u_start = zeros(nout))
-    @variables u(t)[1:nout]=u_start [
+    @variables u(t)[1:nout] [
         output = true,
-        description = "Inner variable in RealOutput $name"
+        description = "Inner variable in RealOutputArray $name"
     ]
     u = collect(u)
-    ODESystem(Equation[], t, [u...], []; name = name)
+    ODESystem(Equation[], t, [u...], []; name = name, guesses = [u => u_start])
 end
 @doc """
     RealOutputArray(;name, nout, u_start)
@@ -90,7 +90,7 @@ Connector with an array of output signals of type Real.
 
 # Parameters:
 - `nout=2`: Number of outputs.
-- `u_start=zeros(nout)`: Initial value for `u`.
+- `u_start=zeros(nout)`: Guess value for `u`.
 
 # States:
 - `u`: Value of the connector which is an array.