MissingValue and PrototypeValue must be the same class. ismissing(MissingValue) must be true. PrototypeValue must not be missing. {0}(missing) must return MissingValue. {0} must have a matrix conversion from missing that preserves the shape of the input. missing({0}) must throw MATLAB:UnableToConvert. {0}(missing) must return a missing value of {0}. {0}({1}(missing)) must return {0}(missing). Assigning missing to an index must set it to MissingValue. Assigning a scalar missing to an array of indices must set them to MissingValue. Assigning an array of missing to an array of indices must set them to MissingValue. [PrototypeValue, missing] must produce [PrototypeValue, MissingValue]. cat(2, PrototypeValue, missing) must return [PrototypeValue, MissingValue]. [PrototypeValue; missing] must produce [PrototypeValue; MissingValue]. cat(1, PrototypeValue, missing) must return [PrototypeValue; MissingValue]. MissingValue == MissingValue must be false, because all missing values are unequal. MissingValue ~= MissingValue must be true, because all missing values are unequal. MissingValue < MissingValue must be false. MissingValue > MissingValue must be false. MissingValue <= MissingValue must be false, because all missing values are unequal. MissingValue >= MissingValue must be false, because all missing values are unequal. isequal(MissingValue, missing) must return false, because all missing values are unequal. isequal(missing, MissingValue) must return false, because all missing values are unequal. isequal(MissingValue, MissingValue) must return false, because all missing values are unequal. isequaln(MissingValue, missing) must return true. isequaln(missing, MissingValue) must return true. isequaln(MissingValue, MissingValue) must return true. ismissing(MissingValue, missing) must return true. ismissing(MissingValue, MissingValue) must return true. ismissing(PrototypeValue, missing) must return false. ismissing(PrototypeValue, PrototypeValue) must return true. Fill value for assignment growing an array must be MissingValue. Assignment of PrototypeValue to an empty missing array must throw MATLAB:UnableToConvert.