Subset the MSE object by particular MPs (either MP number or name), or particular simulations, or a subset of the projection years (e.g., 1: < projection years).

## Arguments

- MSEobj
A MSE object.

- MPs
A vector MPs names or MP numbers to subset the MSE object. Defaults to all MPs.

- sims
A vector of simulation numbers to subset the MSE object. Can also be a logical vector. Defaults to all simulations.

- years
A numeric vector of projection years. Should start at 1 and increase by one to some value equal or less than the total number of projection years.

## Examples

```
if (FALSE) {
MSE <- runMSE()
MSE_1 <- Sub(MSE, MPs=1:2)
MSE_1@MPs
MSE_2 <- Sub(MSE, sims=1:10)
MSE_2@nsim
}
```