find the position of a value in a "Double-precision array"

4 次查看（过去 30 天）
qigejian wang
qigejian wang 2023-8-10
编辑： John D'Errico 2023-8-10
Hi, I have a 12904*1 double-precision array in matlab and would like to find the position of a value. For example, when I input "-10.1333", it returns "1", when I input "-10", it returns "5". I tried "find(time_samp==-10.1333)", it just returens "0×1 empty double column vector". Need some help, thank you.

请先登录，再回答此问题。

回答（1 个）

John D'Errico
John D'Errico 2023-8-10
编辑：John D'Errico 2023-8-10
-10.1333 the EXACT VALUE? NO. All you see is that number written with 4 digits after the decimal point. You need to learn to use a tolerance.
Seriously, is 0.3333 the exact value of 1/3? Of course not! In fact, there is no finite number of digits that will exactly represent that fraction, as a DECIMAL, or as a number stored in a binary form, as it is internally in MATLAB.

类别

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

标签

产品


版本

R2023a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by