MATLAB: Error in setting UpperBound in optimvar

Question

I'm trying to implement this example:

Script 9: Unit Commitment

when I get to this line:

power = optimvar('power',nHours,plants,'LowerBound',0,'UpperBound',maxGenConst);

I get the following error message: " _Error using optimvar (line 118) Error setting property 'UpperBound' of class 'optim.problemdef.OptimizationVariable': Value must be numeric."

The UpperBound variable maxGenConst is a 24×4 table containing numerical values. What is the problem here?

Answer 1

Look at https://www.mathworks.com/examples/matlab/community/36286-script-9-unit-commitment

plantProps is a table() object, but

MaxGenerationLevel  = plantProps{5,:};

which extracts row 5 of plantProps table into numeric form.

Then,

maxGenConst = repmat(MaxGenerationLevel,nHours,1);

replicates that numeric row into multiple rows, still giving you numeric form.

So by the time you are at

power = optimvar('power',nHours,plants,'LowerBound',0,'UpperBound',maxGenConst);

maxGenConst is numeric, not a table object.