function calling in Matlab visualization in ThingSpeak

How to call a function in matlab visualization?

Answer 1

[Hassaan]

% Main script for MATLAB Visualization
% This could be any code that reads and processes data from your ThingSpeak channel

% Example: Calculate the mean of a field and then call a custom function
data = thingSpeakRead(ChannelID, 'Fields', FieldID, 'NumPoints', 10);
meanValue = mean(data);
result = myCustomFunction(meanValue);

% Display or plot your result here
disp(result);

% Define your custom function at the end of the script
function out = myCustomFunction(input)
    % Example function that simply doubles the input value
    out = input * 2;
end

• The script begins by reading data from a ThingSpeak channel using thingSpeakRead.
• It calculates the mean of this data.
• Then, it calls myCustomFunction, which is defined later in the script.
• myCustomFunction takes a single input (in this case, the mean value calculated) and returns the input multiplied by 2.
• The result of this function call is then displayed or can be used for further processing or visualization within ThingSpeak.

When writing MATLAB code for ThingSpeak:

• Ensure all functions used are defined within the same script, as external files or toolboxes might not be accessible.
• Test your script in MATLAB or ThingSpeak to ensure compatibility and correct execution.
• Utilize ThingSpeak-supported MATLAB functions and features, as not all MATLAB functionalities may be available or behave identically on ThingSpeak.

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Answer 2

[Tanusree]

Thanks for the response. But I would like to save my several functions once and use them in all my visualizations (as we would do it in every local Matlab program). However, I didn't find any way to do this on Thingspeak. My workaround is to copy+paste all my functions and parameters in every visualization code. This works, but it is not nice.