Matlab value error while creating vector

Question

Brandon Graha 2018-11-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429435-matlab-value-error-while-creating-vector

评论： Brandon Graha 2018-11-12

I am creating a vector

    dt = 0.1;
    x = 0:dt:10;

and then trying to find the index for

    loc = 4.6;
    j = find(x==loc);

the index should be 47, however I receive

    j = 
      1×0 empty double row vector

Matlab is adding a small value (8.8818e-16) to this value and varying small values to other numbers in the vector, but not all. I can remove the small errors on the numbers through

x=round(x,3)

but I'm wondering if there is something that needs to be done to prevent this error in the future. I am currently using version 2018a and 2016b, and they both do this.

Thank you