Equality operator error with exact same value
显示 更早的评论
I have the following code and it presents a bug:
data = 22.7:0.1:24.2; TEMP(1) = 23.1;
if TEMP(1) == data(5)
3-2 %this is only sample effect
else
5-2 %this is only sample effect
end
This outputs
3
But if I use
if TEMP(1) == 23.1
3-2 %this is only sample effect
else
5-2 %this is only sample effect
end
This outputs
1
You can see from the "data" matrix that data(5) is 23.1.
What kind of bug is this and how can I avoid this kind of bug in the future? I've tried 2 different PCs with different MATLAB versions and they both have the same problem.
采纳的回答
Steven Lord
2022-4-13
0 个投票
This is not a bug. See the section "Avoiding Common Problems with Floating-Point Arithmetic" on this documentation page.
2 个评论
Glenn Franco Gacal
2022-4-14
Steven Lord
2022-4-14
No need to apologize. You aren't the first person to encounter this behavior (it's a common enough question that our documentation staff created a documentation page for it, after all) and you almost certainly won't be the last.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Logical 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
