diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setMassFractions.m b/interfaces/matlab/toolbox/@ThermoPhase/setMassFractions.m
index e7ff8ea0f..8efaebc98 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setMassFractions.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setMassFractions.m
@@ -1,4 +1,4 @@
-function a = setMassFractions(tp, y, norm)
+function setMassFractions(tp, y, norm)
 % SETMASSFRACTIONS  Set the species mass fractions.
 %
 %   setMassFractions(a,y)
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setMoleFractions.m b/interfaces/matlab/toolbox/@ThermoPhase/setMoleFractions.m
index 3816f644a..90c4d3a47 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setMoleFractions.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setMoleFractions.m
@@ -1,4 +1,4 @@
-function a = setMoleFractions(tp, x, norm)
+function setMoleFractions(tp, x, norm)
 % SETMOLEFRACTIONS  Set the species mole fractions.
 %
 %   setMoleFractions(a,x)
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setPressure.m b/interfaces/matlab/toolbox/@ThermoPhase/setPressure.m
index b5eb97fe0..7e8e18eed 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setPressure.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setPressure.m
@@ -1,4 +1,4 @@
-function a = setPressure(tp, p)
+function setPressure(tp, p)
 % SETPRESSURE  Set the pressure [Pa].
 %
 %    The pressure  is set by changing the density holding the
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setState.m b/interfaces/matlab/toolbox/@ThermoPhase/setState.m
index ccf627d91..e94a90f68 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setState.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setState.m
@@ -1,4 +1,4 @@
-function a = setState(a, job, values)
+function setState(a, job, values)
 disp('deprecated')
 if nargin ~= 3 || ~isa(job, 'char')
     error('Syntax error. Type "help setState" for more information.')
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setState_HP.m b/interfaces/matlab/toolbox/@ThermoPhase/setState_HP.m
index 6c3692e50..e7cb497c0 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setState_HP.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setState_HP.m
@@ -1,4 +1,4 @@
-function a= setState_HP(tp, hp)
+function setState_HP(tp, hp)
 % SETSTATE_HP - Set the specific enthalpy [J/kg] and pressure [Pa].
 %
 %    setState_HP(a, hp) sets the specific enthalpy and pressure
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setState_SP.m b/interfaces/matlab/toolbox/@ThermoPhase/setState_SP.m
index ff7605cbb..415c46592 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setState_SP.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setState_SP.m
@@ -1,4 +1,4 @@
-function a = setState_SP(tp, sp)
+function setState_SP(tp, sp)
 % SETSTATE_SP    Set the specific entropy [J/kg/K] and pressure [Pa].
 %
 %    setState_SP(a, sp) sets the specific entropy and pressure
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setState_SV.m b/interfaces/matlab/toolbox/@ThermoPhase/setState_SV.m
index 6c8c52b52..f44ea1095 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setState_SV.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setState_SV.m
@@ -1,4 +1,4 @@
-function a = setState_SV(tp, sv)
+function setState_SV(tp, sv)
 % SETSTATE_SV    Set the specific entropy [J/kg/K] and specific
 % volume [m3/kg].
 %
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setState_Tsat.m b/interfaces/matlab/toolbox/@ThermoPhase/setState_Tsat.m
index 3326dd004..79e0a2733 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setState_Tsat.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setState_Tsat.m
@@ -1,4 +1,4 @@
-function a = setState_Tsat(tp, tx)
+function setState_Tsat(tp, tx)
 % SETSTATE_TSAT    Set the fluid to a saturated state at
 % temperature t
 %
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setState_UV.m b/interfaces/matlab/toolbox/@ThermoPhase/setState_UV.m
index d10edab62..ebfb656ef 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setState_UV.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setState_UV.m
@@ -1,4 +1,4 @@
-function a = setState_UV(tp, uv)
+function setState_UV(tp, uv)
 % SETSTATE_UV    Set the specific internal energy [J/kg] and
 % specific volume [m^3/kg].
 %
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setState_satLiquid.m b/interfaces/matlab/toolbox/@ThermoPhase/setState_satLiquid.m
index bf156ad32..ed594d5b4 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setState_satLiquid.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setState_satLiquid.m
@@ -1,4 +1,4 @@
-function a = setState_satLiquid(tp)
+function setState_satLiquid(tp)
 % SETSTATE_SATLIQUID    Set the fluid to the saturated liquid state
 % at the current temperature.
 %
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setState_satVapor.m b/interfaces/matlab/toolbox/@ThermoPhase/setState_satVapor.m
index bc67cb275..caa1641b3 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setState_satVapor.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setState_satVapor.m
@@ -1,4 +1,4 @@
-function a = setState_satVapor(tp)
+function setState_satVapor(tp)
 % SETSTATE_SATVAPOR    Set the fluid to the saturated vapor state at the
 % current temperature.
 %
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/setTemperature.m b/interfaces/matlab/toolbox/@ThermoPhase/setTemperature.m
index 0571bb8be..3ca93a9ec 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/setTemperature.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/setTemperature.m
@@ -1,4 +1,4 @@
-function a = setTemperature(tp,t)
+function setTemperature(tp,t)
 % SETTEMPERATURE  Set the temperature [K].
 %