Error showing image after reading it

Hi guys,

I am having trouble displaying an image at the end of my code and keep getting provided with the error:

"Array indices must be positive integers or logical values"

Any suggestions?

The code is at the bottom but I included the whole script just in case you needed it to answer the question. I have also had success displaying images before.

Thanks

%Hangman

%Calling readDictionary function and assigning it to variable to be read
wordList = readDictionary("OxfordDictionary.txt");

%Calling chosenWord function so that word can be indexed and converted to
%string
hiddenWord = chosenWord(wordList);

%Calling hyphenWord function to create vector of hypens = to length of word
whatUserSees = hyphenWord(hiddenWord);

%Clearing command window
clc;

%Welcome message
fprintf("You are now playing hangman and must guess a word from the Oxford Dictionary\n");
fprintf("\n");

%Alerting the user of the length of the word and providing a visual
%representation
fprintf("Your random word has %d letters\n", length(whatUserSees));
fprintf("%s\n", whatUserSees);

%Initialising variables to be used in while and for loop
lives = 6;
correctlyGuessedLetters = 0;

%While loop running conditions are that lives are not 0 and # of correctly
%guessed letters =/= the length of the hidden word
while ~(lives == 0 || correctlyGuessedLetters == length(hiddenWord))
    
    %Asking the user for a string input
    guessedLetter = input("Enter a letter: ", "s");
    
    %Account for uppercase inputs by converting to lowercase
    lowercaseGuess = lower(guessedLetter);
    
    %Scanning the hidden word to see if the user input matches any of the
    %elements
    scanningWord = strfind(hiddenWord, lowercaseGuess);
    
    %Determining if the user has correctly guessed more than one letter in
    %one guess
    NuCorrectlyGuessedLetters = length(scanningWord);
    
    %Incrementing # of correctly guessed letters by the # of letters the
    %user guessed correctly in previous turn
    correctlyGuessedLetters = correctlyGuessedLetters + NuCorrectlyGuessedLetters;
    
    %Creating condition to see if hyphens need to be replaced with guessed
    %letter
    if NuCorrectlyGuessedLetters >= 1
        
        %Reading length of letters guessed
        for i = 1:length(scanningWord)
            
            %Converting each element which has been correctly guessed from
            %hypen to appropriate letter
            whatUserSees(scanningWord(i)) = lowercaseGuess;
        end
        
        %Displaying to the user that they have correctly guessed a letter
        %and updating what they see
        fprintf("You have correctly guessed a letter\n")
        fprintf("%s\n", whatUserSees)
        
        %Using else statement to deduct life if above conditions are not
        %met
    else 
                lives = lives - 1;
                
                %Displaying to user that they have incorrectly guessed a
                %letter and how many lives they have left
                fprintf("Your guess was incorrect\n")
                fprintf("You have %d lives remaining\n", lives)
                
    end
end

%Clearing command window
clc;

%End statement to determine whether user has won or lost
if (lives == 0)
fprintf("You have lost :(\n");
fprintf("Your word was: %s\n", hiddenWord);
loser = imread('youlose.png');
imshow(loser);
else
    fprintf("You have won :)\n");
    fprintf("Your word was: %s\n", hiddenWord);
end

    
    

[Walter Roberson]

That could happen if you had a variable named imshow

[Will Pihir]

Thank you for that. I did have a variable named imshow because I hadn't cleared my workspace.

Answer 1

[Drishan Poovaya]

You can resolve this error by using the clear command before running your code