Question

MATLAB; How to find LowerCaseCount, UpperCaseCount, NumericCount, OtherCount.

Using the input file of characters, determine

% the number of characters that meet the following criterion. Each output

% variable will be a 1 x 1 scalar (i.e. how many of each there are).

% Input: 'Matlab_Wikipedia.mat' (variable name is Contents)

% Output: LowerCaseCount, UpperCaseCount, NumericCount, OtherCount

Answer 1

MATLAB Code:

function [LowerCaseCount, UpperCaseCount, NumericCount, OtherCount] = characterCriteria (contents)
    % Function that counts the number of characters that matches each criteria
  
    % Initializing output variables to 0
    LowerCaseCount = 0;
    UpperCaseCount = 0;
    NumericCount = 0;
    OtherCount = 0;
  
    % Opening file in read mode
    fp = fopen(contents, "r");
  
    % Reading data from file
    data = fscanf(fp, "%s");
  
    % Iterating over char by char
    for i = 1:length(data)
      
        % Checking for numbers
        if isdigit(data(i))

            % Updating numbers count
            NumericCount += 1;
          
        % Checking for lower case letters
        elseif islower(data(i))
      
            % Updating lower case count
            LowerCaseCount += 1;
          
        % Checking for upper case letters  
        elseif isupper(data(i))
      
            % Updating upper case count
            UpperCaseCount += 1;
          
        % Other characters  
        else
          
            % Updating other count
            OtherCount += 1;
          
        endif
  
    endfor
  
    % Closing file  
    fclose(fp);

endfunction

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Sample Output: