db.extract {RGeostats}  R Documentation 
Extracts a vector from the dbclass
db.extract(db, names, flag.compress = TRUE, flag.2d=FALSE, flag.log10=FALSE, pos.x=1, pos.y=2, ref = NA)
db 

names 
List of names of the attributes which must be extracted.
For more information see 
flag.compress 
If TRUE, the function only returns the values corresponding to the active samples (not masked by the current selection). Otherwise, values are returned for all the samples. 
flag.2d 
If TRUE (and if the 
flag.log10 
If TRUE, the extracted vector is logtransformed (base 10). The negative values are turned into NA. 
pos.x 
Gives the rank of the coordinate used on the abscissae axis. Used only if flag.2d = TRUE. 
pos.y 
Gives the rank of the coordinate used on the ordinate axis. Used only if flag.2d = TRUE 
ref 
Vector (of space dimension) which gives the indices of the reference corner point. The extracted plane contains the reference corner point. Used only if flag.2d = TRUE. 
The vector of values. Its length is equal to the total number of samples (if flag.compress=FALSE) or to the number of active samples otherwise. If the number of fields to be extracted is equal to 1, the result is a list of values, whereas it will be a data.frame when extracting more than 1 field.
data(Z_data.db) # Load the Documentation Points Db Z_data.db # Print a short contents of the Db # Extract the vectors which corresponds to variables 'z1' and 'z2' # vector < db.extract(Z_data.db,names=c("z1","z2")) vector # Print the contents of the extracted vector # # Clean up rm(Z_data.db,vector)