Please advise me on how to improve the efficiency of this code?

As the title says, how can i improve on this on the code on the second line?

try_again = input('Do you want to try again?\nPlease enter yes or no:','s');
 while strcmp(try_again,'') == 1 | strcmp(try_again,'yes') ~= 1 | strcmp(try_again,'y') ~= 1 |strcmp(try_again,'no') ~= 1 | strcmp(try_again,'n')  ~= 1 
     try_again = input('Please enter yes or no:','s');
     if strcmp(try_again,'yes') | strcmp(try_again,'y')
         scriptA
     elseif strcmp(try_again,'no') | strcmp(try_again,'n')
         break
     end
 end

Any help or tips would be very greatful, thank you very much

[darova]

while strcmp(try_again,'') == 1 | strcmp(try_again,'yes') ~= 1 | strcmp(try_again,'y') ~= 1 |strcmp(try_again,'no') ~= 1 | strcmp(try_again,'n')  ~= 1 

while isempty( strfind('yesno',try_again) )

Answer 1

[Rik]

You could use an explicit dialog box to avoid any confusion:

answer = questdlg(...
    'Do you want to try again?', ...%question body
    'Retry?', ...%box title
    'Yes','No', ...%options
    'Yes');%default
if strcmp(answer,'Yes')
    scriptA
end

If a GUI option is not acceptable you can use something similar to the suggestion by darova:

options={'yes',1;'y',1;'no',0;'n',0};
try_again = input('Do you want to try again?\nPlease enter yes or no:','s');
L=ismember(options(:,1),try_again);
while ~any( L )
    try_again = input('Do you want to try again?\nPlease enter yes or no:','s');
    L=ismember(options(:,1),try_again);
end
if options{L,2}
    scriptA
end

[Rik]

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