How to iterate an iMath function over many images about antsr HOT 1 CLOSED

Figured it out:

for (i in ls(pattern=glob2rx("pattern_shared_by_R_objects_you_want_to_use*"))) {
VariableName<-i
outputVariableName<-paste0(i,"_disMap")
print(paste0("calculating distance map of ", VariableName))
assign( outputVariableName, iMath(eval(as.name(VariableName)),"MaurerDistance")
}

The first line finds all R objects that start with: "pattern_shared_by_R_objects_you_want_to_use" and submits them to the "for" loop
The loop creates variables, prints a message indicating which file is being processed at each particular iteration, and the magic happens in the "assign" function. The "eval(as.name(VariableName))" ensures that the assign function treats the current value of "VariableName" as an R object.

Hope this helps someone!

from antsr.