When recursive method is RLS, this

When recursive method is RLS, this VI uses the value in the first row and the first column of ref value as the forgetting factor. The forgetting factor specifies the percentage of information this VI uses from previous estimation calculations. The range of the forgetting factor is between 0 and 1. For example, if you set the forgetting factor to 0.5, this VI uses 50% of information from previous estimation. If you want to estimate a time-invariant system, you can set the forgetting factor between 0.98 and less than 1. If you want to estimate a time-variant system, you can set a smaller forgetting factor. Then, this VI can have a better ability to track the changes of the system coefficients.