Help on converting dubble to uint8 ?

1 次查看（过去 30 天）
Henry Buck
Henry Buck 2016-9-18
评论： Henry Buck 2016-9-18
Hey,
I have wave signal that change between 2-20 and it's type of dubble. I need to convert it to type uint8, for example:
The wave signale is INDX(change from 2 to 20) type of dubble. Convert signal is: ADR = uint8(INDX);
the result of that conversion gives me values from 0 to 20. Even when ADR is runs from 0 to 18 or 1 to 19 I get the same result : ADR = 0 to 20 ?
Is it possible to get the same values of INDX after using INDX input ? for example, if INDX is running from 3 to 17, the result (ADR=uint8(INDX)) will be 3 to 17 instead 0f 0 to 20 ? or, if INDX is running from 2 to 18, the result (ADR=uint8(INDX)) will be 2 to 18 instead 0f 0 to 20 ? or, if INDX is running from 2 to 20, the result (ADR=uint8(INDX)) will be 2 to 20 instead 0f 0 to 20 ?
I need to keep the same values of the start and end(of INDX) after using uint8(INDX). uint8 type ,must be use.
Thanks, Henry

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2016-9-18
You must have made a mistake somewhere.
>> uint8(3:17)
ans =
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
In the expression 3:17 the values are double precision values, so this shows that converting double precision values to uint8 works as expected for small non-negative values.
  5 个评论
显示 3更早的评论
Walter Roberson
Walter Roberson 2016-9-18
Not being a vector is irrelevant.
>> A = 53*(reshape(3:17, 3, 5) + rand(3,5)); B = 48; INDX = uint8(A/B)
INDX =
4 8 10 14 17
5 9 12 15 19
6 9 13 16 19
Henry Buck
Henry Buck 2016-9-18
hey guys,
I have to be honest. It is my mistake.
Thanks again.
Henry

请先登录，再进行评论。

更多回答（0 个）

类别

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

标签

尚未输入任何标签。

Community Treasure Hunt

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

Start Hunting!

Translated by