displays as unsigned integer why?

2022 12 21
0 个回答
更新时间：2022 12 21
1 次查看（30 天）

0 个投票

6 个评论
显示 4更早的评论 隐藏 4更早的评论

Jan
Jan 2022-12-21
The question does not contain enough information to be answered.
bill buersch
bill buersch 2022-12-21
well the range for a 16 bit integer is
-32,768 to +32,767
however for an unsigned 16 bit integer it is
0 and 65,535 In the picture we see 65535 shown but in fact is -1 because that while the bits are the same, it is being wrongly interpreted by the chart program on the website.
A 16-bit integer can store 216 (or 65,536) distinct values. In an unsigned representation, these values are the integers between 0 and 65,535; using two's complement, possible values range from −32,768 to 32,767.
So i guess my question is there as setting to have 65,535 treated as a signed integer so the chart looks right?
Geoff Hayes
Geoff Hayes 2022-12-21
@bill buersch perhaps you need to show the code that generates this chart.
bill buersch
bill buersch 2022-12-21
i can't because it is thingspeak code that generates the chart. it's the chart you get when you log in. it interprets as unsigned when it should interpret as signed. but i see that there is no way it would know.
bill buersch
bill buersch 2022-12-21
移动：DGM 2022-12-21
notice that when the outside air temp rises above 0 it's fine.
bill buersch
bill buersch 2022-12-21
移动：DGM 2022-12-21
data as stored: 2022-12-21 12:36:13 UTC,1,65535,,,,,,,

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Simulink Functions 的更多信息

产品

标签

移动:

DGM
DGM
2022-12-21

Community Treasure Hunt

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

Start Hunting!

Translated by