Error in t(I) %∗% solve(V) %∗% e : could not find function "%∗%"

The error message indicates that the function "%*%" is not recognized by R. This could be due to a typographical error or because the function is not loaded in your R session.

In R, the symbol "%*%" is used for matrix multiplication. If you are trying to perform matrix multiplication, you can use the symbol "%*%" instead of "%∗%".

If you are trying to use a custom function that uses "%∗%" for matrix multiplication, you may need to define the function or load the package that contains the function before using it.