# fes2.hillsfile: Calculate free energy surface by conventional algorithm

## Description

`fes2.hillsfile` sums up hills using slow conventional algorithm. It can be used
as a reference or when hill widths are variable.

## Usage

# S3 method for hillsfile
fes2(hills, imin = 1, imax = NULL, xlim = NULL,
ylim = NULL, zlim = NULL, npoints = 256)

## Arguments

imin

index of a hill from which summation starts (default 1).

imax

index of a hill from which summation stops (default the rest of hills).

xlim

numeric vector of length 2, giving the CV1 coordinates range.

ylim

numeric vector of length 2, giving the CV2 coordinates range.

zlim

numeric vector of length 2, giving the CV3 coordinates range.

npoints

resolution of the free energy surface in number of points.

## Examples

Run this code```
# NOT RUN {
tfes<-fes2(acealanme, imax=1000)
# }
```

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