Question

In MatLab

1. Ask the user to enter a 1 x 5 vector of numbers. Determine the size of the user entry.
2. Ask the user to enter a 1 x 5 vector of numbers. Determine the size of the user entry. If the user enters a 5 x 1 vector, use a warning statement to inform the user of their error, and set the new input value to be the transpose of the user input value. If the user enters a vector that is not the correct size, use an error message to terminate the program.
3. Ask the user to enter a 1 x 5 vector of numbers. Determine the size of the user entry. If the user enters a 5 x 1 vector, use a warning statement to inform the user of their error, and set the new input value to be the transpose of the user input value. If the user enters a vector that is not the correct size, ask the user to re-enter the vector using the correct dimensions. The program should continuously check the user input each time it is entered. Continue to ask the user to input a new vector until the user correctly enters a 1 x 5 vector.
4. Ask the user to enter a 1 x 5 vector of numbers. Determine the size of the user entry. If the user enters a 5 x 1 vector, use a warning statement to inform the user of their error, and set the new input value to be the transpose of the user input value. If the user enters a vector that is not the correct size, ask the user to re-enter the vector using the correct dimensions. The program should continuously check the user input each time it is entered. Continue to ask the user to input a new vector until the user has entered three tries. If the user fails to enter a vector correctly given three chances (including the first entry), use an error message to terminate the program.

Answer 1

tries = 0;
correct = false;
while tries < 3 && correct == false
v = input('Enter a 1x5 vector of numbers: ');
   tries = tries + 1;
   [m, n] = size(v);
   if m == 1 && n == 5
       correct = true;
   elseif m == 5 && n == 1
       warning('You entered a 5x1 vector. Setting to transpose');
       v = v';
       correct = true;

   else
       disp('You entered an incorrect dimension vector');
   end
end

if correct == false  
   error('You did not enter a 1x5 vector in 3 attempts! Terminating program.');
else
   disp(v);
end

output
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Enter a 1x5 vector of numbers: > [2]
You entered an incorrect dimension vector
Enter a 1x5 vector of numbers: > [1 2]
You entered an incorrect dimension vector
Enter a 1x5 vector of numbers: > [1; 2; 3; 4; 5]
warning: You entered a 5x1 vector. Setting to transpose
warning: called from
warn at line 10 column 3
1 2 3 4 5