MATLAB error in counting

4 views (last 30 days)
Adam
Adam on 18 Apr 2012
How is it possible that my calculator comes out a different result than matlab calculated?
>> suma2= 7874;
voxsuma2=suma2*2*0.9766;
str = ['označena plocha je 2', num2str(voxsuma2), ' mm^2.']
str =
označena plocha je 215379.4968 mm^2.
a calculator:7874*2=15748
15748*0.9766=15379,4968
15379,4968 or 215379.4968 is correct? WTH??
  1 Comment
Adam
Adam on 18 Apr 2012
good, as I do that the result was the same as on a calculator?

Sign in to comment.

Accepted Answer

Friedrich
Friedrich on 18 Apr 2012
Hi
num2str is correct here, but the missing space after the 2 makes the result looking wrong, because the correct number 15379.4968 appears right after the 2. Try
suma2= 7874;
voxsuma2=suma2*2*0.9766;
str = ['označena plocha je 2 ', num2str(voxsuma2), ' mm^2.']
(Note the extra space after "je 2" before the num2str)
  2 Comments
Friedrich
Friedrich on 18 Apr 2012
Its a formatting thing, the num2str works correct. take the number you see on the screen 215379.4968 and ignore the 2 in front of it and you will get 15379.4968. The 2 you see is the 2 you print before it with the text string "je 2". Its like a typo. The 2 doenst belong to the value which num2str gives but it looks like it does.

Sign in to comment.

More Answers (1)

Ilham Hardy
Ilham Hardy on 18 Apr 2012
Just realized that!

Products

Community Treasure Hunt

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

Start Hunting!