grid.search: Performs a grid search to minimize the objective function
In pi0: Estimating the proportion of true null hypotheses for FDR

Description Usage Arguments Details Value Author(s) See Also

Performs a grid search to minimize the objective function

1	grid.search(obj, lower, upper, ngrid, ...)

`obj`	objective function to be minimized
`lower`	numeric vector giving the lower bound of grid for each dimension
`upper`	numeric vector giving the upper bound of grid for each dimension
`ngrid`	numeric vector giving the number of points each dimension
`...`	other arguments passed to `obj`

This function first call expand.grid then evaluate obj to find a minimum. The number of calls to obj is prod(ngrid). This is useful for finding a good starting values for many optimization routines.

a numeric vector of the parameter that minimizes obj

Long Qu

optim

pi0 documentation built on May 2, 2019, 4:47 p.m.