please read this paper carefully before using the codes:

https://www.mdpi.com/2076-3417/10/3/1062 or https://www.researchgate.net/publication/338970164_Aircraft_Engines_Remaining_Useful_Life_Prediction_using_an_Improved_Online_Sequential_Extreme_Learning_Machine %% if you want to run the file directly from the cloud without even using matlab , you can click this link. https://octave-online.net/bucket~96FSMjCL3YP2AzKgVSfekU %% please cite the work according the paper. for any questions you can contact the Tarek BERGHOUT.