Basically is the same as sigComparison function in signal.R written by Brian, with minor change.
paramConstraint(label, data = mktdata, columns, relationship = c("gt",
"lt", "eq", "gte", "lte", "op"))
text label to apply to the constraint
data to apply comparison to
named columns to apply comparison to
one of c("gt","lt","eq","gte","lte","op") or reasonable alternatives
Currently, this function compares two columns. Patches to compare an arbitrary number of columns would be gladly accepted.
Comparison will be applied from the first to the second column in the columns
vector.
Relationship 'op' means 'opposite' side. Reasonable attempt will be made to match.