Thingspeakwrite error when using string array
显示 更早的评论
This string of code is taken from the thingSpeak documentation for matlab. I just copy and paste but still got this error. I would very much appreciate it if anyone can tell me where i did wrong
2 个评论
Geoff Hayes
2017-11-13
Dion - which version of MATLAB are you using? If you type doc thingSpeakWrite what does the documentation say about the data (second) input (are strings allowed)?
My matlab version is 2017b student edition. Based on the attached picture above, the data can be a string. This is taken from the doumentation page from https://www.mathworks.com/help/thingspeak/thingspeakwrite.html
采纳的回答
Christopher Stapels
2017-12-20
编辑：Christopher Stapels
2017-12-20
When you write string data to ThingSpeak, it generally wants to have a cell array. You should not usually need to do the String() conversion yourself. Try
thingSpeakWrite(349672,{ans},'Location',[-40,23],'WriteKey',writeKey);
and
thingSpeakWrite(channelID,{2.3,'on','good'},'Location',[-40,23],'WriteKey',writeKey);
Ill have a look at fixing that documented example, thanks for pointing it out.
2 个评论
Marc Hanssens
2024-6-4
what about with arrays? EG: dA,dB & dC are arrays of Doubles and sD is an array of strings
thingSpeakWrite(writeChannelID,'Fields',[1,2,3,4],'Values', [ dA, dB, dC, sD ], 'WriteKey', writeAPIKey, 'TimeStamp',tStamp);
Christopher Stapels
2024-6-4
Generally, the field values cannot be arrays. You can write them as strings or cell arrays.
thingSpeakWrite(writeChannelID,'Fields',[1,2,3,4],'Values', [ {dA}, {dB}, {dC}, {sD} ], ...
'WriteKey', writeAPIKey, 'TimeStamp',tStamp);
更多回答（0 个）
社区
更多回答在 ThingSpeak Community
类别
在 帮助中心 和 File Exchange 中查找有关 Read Data from Channel 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 
