Create Optimization Expressions Indexed by Strings

strexp = ["red","green","blue","yellow"];
expr = optimexpr(strexp)

expr = 

  1×4 OptimizationExpression array with properties:

    IndexNames: {{}  {1×4 cell}}
     Variables: [1×1 struct] containing 0 OptimizationVariables

  See expression formulation with showexpr.

You can use a cell array of character vectors instead of strings to get the same effect.

strexp = {'red','green','blue','yellow'};
expr = optimexpr(strexp)

expr = 

  1×4 OptimizationExpression array with properties:

    IndexNames: {{}  {1×4 cell}}
     Variables: [1×1 struct] containing 0 OptimizationVariables

  See expression formulation with showexpr.

If, instead, strexp is 4-by-1 instead of 1-by-4, then expr has that size as well:

strexp = ["red";"green";"blue";"yellow"];
expr = optimexpr(strexp)

expr = 

  4×1 OptimizationExpression array with properties:

    IndexNames: {{1×4 cell}  {}}
     Variables: [1×1 struct] containing 0 OptimizationVariables

  See expression formulation with showexpr.