How to use 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

Answer 1

[Majid Farzaneh]

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

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

[per isakson]

>> num2str   ( 117 )
ans =
117

is ok with R2016a

[Majid Farzaneh]

>> ['test' num2str   (117)]
Error using num2str (line 35)
Not enough input arguments.

When you are using num2str alone, yeah, it works. But in this case (in a string matrix) it dosn't work.

>> ['test' num2str(117)]

ans =

test117

[per isakson]

Correct!

That's might be why I never build strings that way.

str = sprintf( 'Iteration %d: Best cost = %f', it, Bestcosts(it) );

[Tran Hoa]

Excellent. It is done. Thank you very much Majid Farzaneh.

[Majid Farzaneh]

You're welcome