How to have multiple field data in one graph ? | ThingSpeak Apps | Forum

Hi seaurchin,

In Apps > MATLAB Visualizations create a NEW blank visualization (empty edit window)
Copy/paste blindly the code below, run it, read the docs to make your own magic 🙂
This is enough to help you start

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% Read temperature, humidity data from a ThingSpeak channel
% and visualize the data in a single plot using the MATLAB
% THINGSPEAKPLOT function.

% Channel ID to read data from
readChannelID = 00000; % YOUR CHANNEL NUMBER

fieldID1 = 1; % YOUR FIELD NUMBER ie 1 to 8
fieldID2 = 2; % my case 1 Temp 2 Humid

% Data wanted. Learn more about the THINGSPEAKREAD function in docs (easy :))

[data1,time1] = thingSpeakRead(readChannelID,'Field',fieldID1,'NumDays',1);
[data2,time2] = thingSpeakRead(readChannelID,'Field',fieldID2,'NumDays',1);

% Here data1 & data2 take temperature and humidity, time1 & time2 take the day & hour you sent the data to ThingSpeak.
% 'NumDays',1 mean last day (2 for last 2 days, etc.) ... so you have the data to plot

% Learn more about the THINGSPEAKPLOT function in docs (they do not bite I assure you)
% thingSpeakPlot(time, [ humidityData,temperatureData], 'legend',{'H %', 'T *C'});

thingSpeakPlotYY( time2, data2,time1, data1,...
'YGrid1','on','YLabel1','% H.R.',...
'YLabel2','*C','XLabel','Fecha y hora',...
'Title','Tempix y Humix ultimas 24 horas');

% Here you made the plot, that is all. Pairs of ' ' comma separated to say titles, labels, etc.
% 3 dots are saying: this is to make more readable ONE line ( the function is ONE line)
%Pay a lot of attention to UPPER/lower case, spaces, punctuation marks, etc.
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This is PLOT from ThingSpeak, there is a plot from Mathworks/Matlab
Any trouble, questions ...
write here again
I hope this is of some help 🙂