MATLAB: How to use Num2str

num2str

Hi,

I have researched Matlab. When I use Num2str,

disp (['Iteration ' num2str (it) ': Best cost = ' num2str (Bestcosts(it))]);

it happen a mistake

Error using num2str (line 41)
Not enough input arguments.

Please, help me solve this problem

Thank you

Best Answer

Hi, Don't use space between num2str and '('. This will work:

disp (['Iteration ' num2str(it) ': Best cost = ' num2str(Bestcosts(it))]);

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      ['x-' num2str(j) '.^2+ (y-0.5).^2<0.1^2,'  'x,'  'y,'  'z'];

MATLAB: Saving in loop– using eval or num2str

You can omit the evil EVAL. As you see it causes problems, as it ever does.

% eval(['events_',num2str(yr) '=NaN(66,6,60);']);
data = NaN(66,6,60);
% eval(['events_',num2str(yr),'(i,:,ct)','=event_int_all(i,:,j);']);
data(i,:,ct) = event_int_all(i,:,j);
% save('filename', eval(['events_' num2str(yr)]))
S = struct(sprintf('events_%d', y), data);
save('filename', 'S', '-struct');

EVAL reduces the efficiency of the program, the maintainability of the code, the life-time of the programmer and the band-width of the forum servers.

Best Answer

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MATLAB: How to use num2str

MATLAB: Saving in loop– using eval or num2str

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