String array and cell array are two types of containers for storing pieces of data. In this problem, you will be given a cell array of character vectors. Your job is to convert the cell array to a string array, which stores the same pieces of text data.

The Part 1 assuming no missing values in the input cell array is a good starting point. In this problem, the missing values for cell array of character vectors, denoted {''} (i.e., cell of empty character), need to be converted to the missing values for string arrays, denoted < missing >.

Refer to the R2016b documentation for more information on the missing values for different data types.

Example:

Input:
>> x = {'I', '', '', 'MATLAB'}
x =
  1×4 cell array
    'I'    ''    ''    'MATLAB'

Output:
>> y = string('I'); y(4) = 'MATLAB'
y = 
  1×4 string array
    "I"    <missing>    <missing>    "MATLAB"

Related Problems in this series:

• String Array Basics, Part 1: Convert Cell Array to String Array; No Missing Values
• String Array Basics, Part 2: Convert String Array to Cell Array; No Missing Values
• String Array Basics, Part 3: Convert Cell Array with Missing Values to String Array
• String Array Basics, Part 4: Convert String Array with Missing Values to Cell Array