MATLAB: Could you help me with this explanation

matrix multiplication

OverallEffectinevess = (MassFlowFunction*ConvectionCoolingEfficiency)/(1 + MassFlowFunction*ConvectionCoolingEfficiency);
MetalTemperature = (ExternalGasTemperature) - OverallEffectinevess*(ExternalGasTemperature-CoolantInletTemperature);
Error using *
Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'.

Best Answer

It's possible you just need to switch to element-wise operators. E.g.,
OverallEffectinevess = (MassFlowFunction.*ConvectionCoolingEfficiency)./(1 + MassFlowFunction.*ConvectionCoolingEfficiency);
MetalTemperature = (ExternalGasTemperature) - OverallEffectinevess.*(ExternalGasTemperature-CoolantInletTemperature);
What are the sizes of your variables?
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