### Mu Rhythm Linear Classifier Signal Questions

Posted:

**18 May 2020, 15:52**Hello I have some questions regarding the mu rhythm linear classifier and ensure that we are using the correct control signals. For spatial filtering we simply use the CAR filter type. From this, we select C3 and C4 as outputs of the filter in the "SpatialFilterCAROutput" box. My question is in regards to the Linear Classifier matrix. It is our wish to use frequencies in the mu and beta band control a cursor to move horizontally. We wish to have motor imagery detected on C3 to move the cursor to the right, and have motor imagery detected on C4 to move the cursor to the left. In the input column, we have [1, 2, 1, 2] with "1" being spatially filtered signal from C3 and "2" being spatially filtered signal from C4. In the input element column we have [8Hz, 8Hz, 18Hz, 18Hz] to represent the mu and beta frequency values. In the output channel column we have [1, 1, 1, 1] as we only want horizontal movement. And then in the weights column we have [1, -1, 1, -1] with positive values associated with C3 intended to move the cursor to the right and negative values associated with C4 intending to move the cursor to the left. I have attached a screenshot as well.

My main question involves the weights. Are these the correct weights to achieve the performance that we are looking for? A previous group had the weights as [-1, 1, 1, -1] however I believe this to be a mistake. Thank you.

My main question involves the weights. Are these the correct weights to achieve the performance that we are looking for? A previous group had the weights as [-1, 1, 1, -1] however I believe this to be a mistake. Thank you.