Hi

I am using a Lasso model for feature selection. At present I use the function

```
lassoFit = fit(LassoPath, X_train, Y_train, λ = lamGrid, maxncoef=maxncoef)
```

I have the following question.

(1) Some estimated coefficients are negative for each *lamGrid* value, which don’t give a reasonable biological meaning to my problem. I need all coefficients to be non-negative. Is there a way to restrict the coefficients to be non-negative?

Thanks