number format comparison difficulty

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Vanessa 2017 年 7 月 27 日

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https://jp.mathworks.com/matlabcentral/answers/350507-number-format-comparison-difficulty

コメント済み: Stephen23 2017 年 7 月 27 日

Hello everyone!!

Here is my problem. Matlab considers that 3.9438e+04 and 39438 are not the same!! How may I fix this? What conversion should I make?

Thank you, Vanessa

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Geoff Hayes 2017 年 7 月 27 日

Vanessa - please clarify what you mean by MATLAB not considering these two numbers to be the same. Are you trying to perform some equality check and that is failing? Or is it that visually they don't appear the same in the command window? (In which case you can format the data using Set Command Window output display format.

Stephen23 2017 年 7 月 27 日

MATLAB Online で開く

It works for me:

>> 3.9438e+04 == 39438
ans = 1

"Matlab considers that 3.9438e+04 and 39438 are not the same"

Most probably those two variables do not have the same values. Have you tried viewing the numbers at a higher precision, e.g. by changing the format or using sprintf ?

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