profile: jk, jack knifes 'aspic'
In laurieKell/aspic: What the package does (short line)

Description Arguments Value See Also Examples

Fits the aspic model to catch and catch per unit effort data removing 1 cpue observation at a time

Performs a profile using residual sum of squares, fixes some parameters for a range of values and then estimate the others

`object;`	an `aspic` object or
`object;`	a character string giving an aspic "inp" file
`dir;`	an optional `dir` where aspic text files used for fitting can be found
`fitted:`	an `aspic` object
`which:`	`character` giving the parameters to do the profile for, i.e. to fix.
`fixed:`	`character` any parameters that should be fixed, all others are extimated.
`maxsteps:`	`numeric` number of parameter values to vary, default is 11.
`range;`	`numeric` how mucg to vary parameter values by, default [0.5,1.5].
`fn:`	`function` that gives values to be profiled.
`run:`	`logical` if `TRUE` then returns profile, otherwise it just sets the control object-

An aspic object with fitted values and parameter estimates

a data frame with results turned by fn by values in which.

biodyn,boot,fit

biodyn,fit

## Not run: 
    data(asp)
    asp=jk(asp)
## End(Not run)
## Not run: 
data(asp)
res=profile(asp,which="msy",fixed="b0",maxsteps=31,range=c(0.5,1.1))
ggplot(res)+geom_line(aes(k,rss))

## End(Not run)