How to check for size of input vector

Question

Sean St Cyr 2020-10-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/627003-how-to-check-for-size-of-input-vector

回答： VBBV 2022-3-11

I am trying to get my code to ask a user to input a vector and then check to see if the vector is a 1 x 5 or not, and then if it is a 5 x 1 transpose it, and if its none then count chances + 1 and if they dont do it 3 times it is an error and the program terminates. can someone help?

A = [1 , 5];            % compare the size of vector entered by user is 1 X 5
B = [5 , 1];            % compare the size of vector entered by user is 5 X 1
chances = 0;                %setting flag to use in loop
while chances<3 
   % V = input('Enter a 1 X 5 vector: ');                    %getting user input and adding it two v
    s = size(V);                  %determining size of entered vector 
    
    if V(A,s)==1            % checking that size of v is 1 X 5
        fprintf('The resulting 1 X 5 vector is: \n');   % assigning message to display
        disp(V);                 %displaying v
        chances=4;             % setting termination condition for loop
    elseif (V(s,B)==1)         % checking that size of v is 5 X 1
        warning('Error: You entered a 5 X 1 vector! \n');       % errror message displaying
        V = V.';                                                % transposing vector to 1 X 5
        fprintf('The resulting 1 X 5 vector is: \n');           % assigning message to display
        disp(V);                 %displaying v
        chances=4;             % setting termination condition for loop
    else
        fprintf('Entered dimesion is wrong.\n');               
        chances = chances + 1;         %incrementing chance count
    end
end
if(chances==3)
    error('Your Chances are over.');                    % printing the error message if try is over 
end
 

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Rik 2020-10-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/627003-how-to-check-for-size-of-input-vector#answer_525133

在 MATLAB Online 中打开

Start by uncommenting the line with input.

Next you need to think how to compare vectors. You can do something complicated, but you can also use isequal:

if isequal(s,A)
elseif isequal(s,B)
else
end

2 个评论
显示无隐藏无

Sean St Cyr 2020-10-26

okay, i tried that before and its not working that way, if there any error in my code above?

Rik 2020-10-26

What are you providing as input for V and what is the exact error? (put clc at the top and copy all text)

请先登录，再进行评论。

Answer 2

VBBV 2022-3-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/627003-how-to-check-for-size-of-input-vector#answer_915439

在 MATLAB Online 中打开

A = [1 , 5];            % compare the size of vector entered by user is 1 X 5
B = [5 , 1];            % compare the size of vector entered by user is 5 X 1
chances = 0;                %setting flag to use in loop
while chances<3 
 V = input('Enter a 1 X 5 vector: ');                    %getting user input and adding it two v
  s = size(V);                  %determining size of entered vector  
  if A == s            % checking that size of v is 1 X 5
      fprintf('The resulting 1 X 5 vector is: \n');   % assigning message to display
      disp(V);                 %displaying v
      chances=4;             % setting termination condition for loop
  elseif (s==B)         % checking that size of v is 5 X 1
      warning('Error: You entered a 5 X 1 vector! \n');       % errror message displaying
      V = V.';                                                % transposing vector to 1 X 5
      fprintf('The resulting 1 X 5 vector is: \n');           % assigning message to display
      disp(V);                 %displaying v
      chances=4;             % setting termination condition for loop
  else
      fprintf('Entered dimesion is wrong.\n');               
      chances = chances + 1;         %incrementing chance count
  end
end
if(chances==3)
  error('Your Chances are over.');                    % printing the error message if try is over 
end