Why is it not taking the sqrt function, and how to fix it?

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Jeremy Reyes
Jeremy Reyes 2021-8-31
评论： Jeremy Reyes 2021-9-1
U = (sqrt(s)/n)*(BH./B+2.*H).^2/3;
I am not sure why it is not taking sqrt. Is it a problem with the 's' data, or how i wrote the formula?
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Stephen23
Stephen23 2021-8-31
Rather than fiddling around with strings (e.g. using STR2NUM) the best solution by far would be to import your numeric data properly. If you upload your data file by clicking the paperclip button then someone can show you how.

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回答（1 个）

Wan Ji
Wan Ji 2021-8-31
You should transform char format to double then do your work
B = str2num(B);
H = str2num(H);
n = str2num(n);
s = str2num(s);
U = (sqrt(s)./n).*(B.*H./B+2*H).^2/3;
  1 个评论
Jeremy Reyes
Jeremy Reyes 2021-9-1
thank you, this made more sense because of the matrices of my datas were all in one column and row. This helped!

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