How can I force MatLab to display integers in function sprintf ?

Question

Julia 2014-6-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/133584-how-can-i-force-matlab-to-display-integers-in-function-sprintf

评论： Stephen23 2015-3-3

Hi,

I would like to save graphs in a loop and use sprintf to change the file names, but don't want to have decimal places because this destroys the file extension. The loop is:

for i=1:5
x = [0 ; 0.44; 1.1; -1,1; -0.44];
sprintf('Graph %2d.png',x(i)*100) 
end

When I use x(3) =1.1 sprintf('Graph %2d.png',x*100) gets displayed as " Graph 1.100000e+02 ". The same problem does not occur with sprintf('Graph %2d.png',110). If x = 0.44 is also works fine. How can I force MatLab to display integers for every number?

Thanks for your help!!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

the cyclist 2014-6-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/133584-how-can-i-force-matlab-to-display-integers-in-function-sprintf#answer_140290

在 MATLAB Online 中打开

Due to the limits of floating point arithmetic, 1.1*100 is not precisely represented as 110.

You could try

round(x(i)*100)

3 个评论
显示 1更早的评论隐藏 1更早的评论

Sean de Wolski 2014-6-10

在 MATLAB Online 中打开

I recommend using the '%04i' syntax which will maintain alphabetical order:

sprintf('%03i',6)

Stephen23 2015-3-3

在 MATLAB Online 中打开

Actually sprintf already preforms a round operation internally, so adding an explicit round is unnecessary and just slows it down. If you want to guarantee that the output does not use exponent notation, then %.0f format is best: