Invalid use of operator "

I was trying follow and replicate the example code for the Temperature/Humidity Matlab and continue to get the error as follows:

Error in /users/mss.system.Z1My17/Temperature Humidity Line:14 Column:5

In the line is the following:

13 thingSpeakWrite(writeChId, [temp, humidity, dewPointF], "Fields", [1,2,3]...
14     "TimeStamps", time, "Writekey", writeKey)

[Scott Milliken]

does not seem to matter whether it is a single or a double. The error is shorter if it is the double vs the single.

[KALYAN ACHARJYA]

yes

Answer 1

[Walter Roberson]

The ... ends the line immediately. There is no implied separator inserted. So you have a ] from the numeric list followed by the content of the second line which is some spaces and then the literal, exactly as if you had written the numeric list and then some spaces and then the string.

[1,2,3]  "TimeStamps"

all as one parameter. Numeric list followed by string is not valid syntax in this context. You need to add the missing comma.

[Scott Milliken]

I copied the code, manually from the examples for "Collect Data In A New Channel". The code is in the image and the error in the second image. I would copy/paste, but it does not seem to work on the Matlab websites.

[Walter Roberson]

Click on the > Code button in the editor and then you can paste in code with control-v or right click paste.

Sorry, but I lack the authority and access to rewrite MATLAB to support the code in the broken example. I told you what you have to do to fix the problem: put in a comma after the numeric list. Are you more interested in getting your code working, or in getting MATLAB changed so that that code runs as-is?

If it is a Mathworks example that you are using then if you post a link to the original then I would be happy to file a bug report about the example having an error.

[Stephen23]

The code appears to be copied from here:

https://www.mathworks.com/help/thingspeak/analyze-your-data.html

The documentation example includes the comma:

[Scott Milliken]

@Stephen, Thanks for the circle. I apologize as I didn't see the comma and at first I had 4 periods in there, then tried the comma at the end of the line. Tired eyes do that to me everytime.

@Walter, I just want it to run properly. It seems to run somewhat, there are still errors. The code lists numerous dew points, but then advises there is an error using Temperature Humidity line 13. Then it states to ensure the proper channel ID and Write key API are being used. From what I cans they are the proper ID and Key. Can't copy/paste into the code box. On the page I'm using there is no Code button to click on.

[Scott Milliken]

Thanks all for the help. Not sure what I did but all is now working.

Thanks