grasp.in {grasper} | R Documentation |
Initializes the main objects that are used throughout the GRASP-R session
grasp.in(Ymat, Xmat, Xpred)
Ymat |
name of the data frame of variables of interest. |
Xmat |
name of the data frame of environmental drivers. |
Xpred |
name of the data frame of new environmental drivers to predict from |
Grasp.in does several steps. It loads the required libraries (mgcv, modreg and MASS) and copies Ymat to YYY, Xmat to XXX and Xpred to XXXpred.
Then it creates a first model using random variables (note that it overwrites all previous models). It also creates the weights (WEIGHTS data frame).
After initialisation, you can change the weights by editing the WEIGHTS variable. It also intialises a few other objects usefull to GRASP-R.
If you are not aiming at making predictions and therefore not using XXXpred, simply use grasp.in(Ymat, Xmat, Xmat).
The File / Import... menu from grasp.GUI automates importation of ascii files and automatically launches grasp.in after importation.
If you want to import files using the R prompt, look at the following functions : load
, read.table
and scan
.
You can save R objects back to the disk using the command save
Fabien Fivaz fabien.fivaz@bluewin.ch. Ported to R from GRASP http://www.cscf.ch/grasp/ for S-Plus written by A. Lehmann, J.R. Leathwich and J. McC Overton. Look at http://www.cscf.ch/grasp for details and update.