Converting an equation into MATLAB code
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
NeverPerfecT
am 22 Apr. 2018
Kommentiert: Steven Lord
am 27 Jun. 2023
I am trying to write a code that calculates the accuracy of my network using sMAPE. The equation is depicted here:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/188169/image.png)
(Y is actual value, F is forecast value, n is the amount of data)
I have written this code (I have 25 data):
e= gsubtract(output,y);
y= net(input);
accuracy = (0.08*mean(abs(e./(abs((output)+(y))))))
"output" on the code above is the target, "y" is the output (sorry for the misleading name with the actual output) Assuming I use the equation above as a reference, is this code correct?
2 Kommentare
Walter Roberson
am 22 Apr. 2018
We do not know. How does e relate to Y or F? How does output relate to Y or F ?
Akzeptierte Antwort
Walter Roberson
am 22 Apr. 2018
sMAPE = sum(abs(Y - F) ./ abs(Y + F)) * (2/length(Y))
2 Kommentare
Walter Roberson
am 23 Apr. 2018
The forecast value could be negative. That would make (Y-F) increase beyond Y, and Y+F would be less than Y. That would give you a contribution greater than 1 at that point.
Weitere Antworten (2)
Gujju
am 27 Jun. 2023
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1420883/image.png)
Can someone please create the Matlab code for Equation (6) & (8). Those are curves but I'm getting diefferent results.
1 Kommentar
Steven Lord
am 27 Jun. 2023
This isn't related to the original question in this discussion, so you should ask it as a separate question using the Ask link near the top of the page. When you ask that separate question, please show us the code you've written to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance.
Siehe auch
Kategorien
Mehr zu Electrophysiology finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!