No Lines between points when plotting on ThingSpeak (Example ThingSpeak Code)

Hello,

I am having problems with a simple 2-y-axis plot on ThingSpeak.

The measurement dots just do not get connected by a line.

Does anyone have an idea why that happens?

This is my code: (even the example ThingSpeak code)

readChannelID = [685541];
fieldID1 = [1];
fieldID2 = [2];
readAPIKey = '*************';
[data1, time1] = thingSpeakRead(readChannelID, 'Field', fieldID1, 'NumPoints', 3600, 'ReadKey', readAPIKey);
[data2, time2] = thingSpeakRead(readChannelID, 'Field', fieldID2, 'NumPoints', 3600, 'ReadKey', readAPIKey);
yyaxis left;
plot(time1, data1,'-x')
ylim([15 37])
yyaxis right;
plot(time2, data2,'-x');
ylim([0 100])

Answer 1

[Vinod]

It is very likely that your data has NaN's in them. You can remove the missing entries using the RMMISSING function before plotting. Your code might look like this:

data1 = thingSpeakRead(readChannelID, 'NumPoints', 3600, 'ReadKey', readAPIKey,'OutputFormat','timetable');

cleanData1 = rmmissing(data1);

plot(cleanData1.Timestamps, cleanData1.Field1);

[Ragnar Schäning]

Thank you very much, it actually worked.

Have a great day!