Comparative Operator result is wrong

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여춘 박
여춘 박 2021-4-12
评论： Stephen23 2021-4-12
I tried to run the if statement but this happens.
The result must be true(=1) in the last instruction but it returns false(=0)...
Anyone knows what is the problem???

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回答（3 个）

KSSV
KSSV 2021-4-12
Note that you are comparing two floating point numbers and such numbers cannot be comapred using ==. Follow
tol = 10^-5 ;
idx = abs(val1-val2)<tol
Steven Lord
Steven Lord 2021-4-12
Two numbers that are displayed the same may not represent the same stored value. See this Answers post for more information about floating point numbers.
Image Analyst
Image Analyst 2021-4-12

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