I am new to ThingSpeak and I am getting data from 2 sensors for liquid measurement onto my thingSpeak channel. I want to create a MATLAB visualization that combines data from 2 fields of the channel, combine the data for a day and display it in the form of scatter or 2-d line plot. How can I do that? I am new to MATLAB and thingSpeak. I am currently using the following code but it is just displaying the chart not the lines or scatter dots in both cases. What could be the problem?
CID = ; rkey= ''; datetimeStop = dateshift(datetime('now'),'start','hour'); datetimeStart = dateshift(datetime('now'),'start','hour') - hours(130); t = datetime(2017,9,14); %data = thingSpeakRead(CID,'DateRange',[datetimeStart,datetimeStop],... %'Fields',1); data = thingSpeakRead(CID,'NumPoints',9,... 'Fields',2); averageData = mean(data); averageData x=datetimeStart; totalLiquid = averageData * 10; totalLiquid y=totalLiquid; thingSpeakScatter(x, y)
I look forward to your answers.