Error using ~= Matrix dimensions must agree during using while function

3 visualizzazioni (ultimi 30 giorni)
I was testing the while loop for my ATM script.
password = 'jjteam'
password =
ucsdmate
balance = num1str(9.5405*100,'%10.2f%')
lastlogindate = datenum(2014,11,2,11,7,39)
lastlogindate =
7.3591e+05
datestr(lastlogindate)
rate = num2str(0.02*100,'%5.2f%%')
I save above code as atm.mat.
load ('atm.mat')
inpass = input('Enter your password : ','s');
while inpass ~= mypassword
disp('The passwoard is wrong,please try again.')
inpass = input('Enter your password : ','s');
end
fprintf('Your password is right.\n')
However, when I try to test my script, it said Error using ~= Matrix dimensions must agree. And Error in atm ,while inpass ~= mypassword. I am not sure which part I did wrong. Can anyone point it out? Thanks

Risposta accettata

Guillaume
Guillaume il 4 Nov 2014
Modificato: Guillaume il 4 Nov 2014
Use strcmp to compare strings. == and ~= will only work if the strings are the same length.
while ~strcmp(inpass, mypassword)
...
  3 Commenti
Abdul Kazi
Abdul Kazi il 7 Ott 2017
Hi, but what if I wanted it to work despite the strings not being same length?
Walter Roberson
Walter Roberson il 7 Ott 2017
If you are using character vectors and you want to be able to use == to compare character vectors that might be different lengths, and you do not want to use strcmp, then you will need to create a new eq() method for the @char class and you will need to ensure that you version is earlier on the MATLAB path than the built-in version.
If you are using R2016b or later, you could use the string data type instead of character vectors, such as
string(inpass) ~= string(mypasswd)

Accedi per commentare.

Più risposte (1)

Julia
Julia il 4 Nov 2014
Hi,
I don't see where you use "mypassword". You declare only the string "password".

Tag

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by