ask on post multiple data for the same field?

cstapels said
Are you trying to write two different data types to the same field successively or simultaneously?  You can change the data types for each individual post, even for the same field.  You may have to be careful with the plotting or other processing you do with MATLAB code.

It is possible to put multiple data elements in a single field at the same timestamp with a single write, but its not recommended. You would have to parse the data later to separate them.

You would use something like https://api.thingspeak.com/update?api_key=xxxxxxxxxxxxxxxx&field1=2.2andSecondData2.4&

 

There is room for up to 255 characters in a field.  Using two successive writes will give two separate entries, since the time stamp will change. But you can use the "created_at" parameter to  update your channel feed.  If you use the same date for created_at with two posts, you will get two separate entries at the same time.

https://api.thingspeak.com/update?api_key=xxxxxxxxxxxxxxxx&field1=2.2&created_at=2017-11-3%2013:59:59

 

Can you describe what you are trying to do?  Perhaps there is a different way to achieve your goal.  

So I tried https://api.thingspeak.com/update?api_key=xxxxxxxxxxxxxxxx&field1=2.2andSecondData2.4& and I am finding that only the first value is plotted on the chart. How can I retrieve the other values? Or are they lost permanently?