unused arguments while using maxent in dismo

[Rita Castilho]

Hi,

I am on a mac, and I have this issue of unused arguments while using maxent in dismo

model.maxent.present <- maxent(

+ x=rasters.present.crop,

+ p=spoints,

+   a=backgr,

+ args=c(

+ 'randomtestpoints=30',

+ 'betamultiplier=1',

+ 'linear=true',

+ 'quadratic=true',

+ 'product=true',

+ 'threshold=true',

+ 'hinge=true',

+ 'threads=2',

+ 'responsecurves=true',

+ 'jackknife=true',

+ 'askoverwrite=false'

+ )

+ )

Error in maxent(x = rasters.present.crop, p = spoints, a = backgr, args = c("randomtestpoints=30",  : 

  unused arguments (x = rasters.present.crop, p = spoints, a = backgr, args = c("randomtestpoints=30", "betamultiplier=1", "linear=true", "quadratic=true", "product=true", "threshold=true", "hinge=true", "threads=2", "responsecurves=true", "jackknife=true", "askoverwrite=false"))

Even when I delete all arguments I still get the same error...

> model.maxent.present <- maxent(

+ x=rasters.present.crop,

+ p=spoints,

+   a=backgr)

Error in maxent(x = rasters.present.crop, p = spoints, a = backgr) : 

  unused arguments (x = rasters.present.crop, p = spoints, a = backgr)

Can anyone help?

Thanks

Rita

[Jamie M. Kass]

The problem must be with your inputs, as even without args you're getting an error. Few things to check

1. Make sure you don't have another package loaded with a function maxent that is masking the one from dismo.

2. Make sure your inputs are correct. Your x should be a raster or raster stack, p should be your occurrence points (in almost any form), and a should be a matrix or data frame of your background points, with two columns: lat and long.

If the above two are not a problem, I am totally at a loss.