Matlab script file: Linear ARX model in dimensional emotion recognition (Arousal and Valence), validated in RECOLA database.
To get the code working, you would need to obtain the RECOLA database and extract features by OpenSmile by yourself.
Related paper: Ouyang, A., Dang, T., Sethu, V., and Ambikairajah, E., (accepted 2019), "Speech Based Emotion Prediction: Can a Linear Model Work?", in INTERSPEECH, 2019.
ResearchGate: https://www.researchgate.net/publication/335159915_Speech_Based_Emotion_Prediction_Can_a_Linear_Model_Work
Paper also available at: https://www.isca-speech.org/archive/Interspeech_2019/pdfs/3149.pdf