I think I asked a similar question 3 years ago to the  Splus list and I
think the answer was no or noone answered so noone should spend more
than 5 minutes on this 
because it could definitely be a waste of time.
 
My question is whether the function below can be rewritten without a for
loop. apply is fine if it can be done that way but i doubt it. I call it
a lot and would
prefer to not loop.
 
#-----------------------------------------------------------------------
--------------------------
 
constructLt<-function(invector) {
 
outvector<-invector
 
 for ( i in 2:length(invector) ) {
 if ( invector[i] < 1 ) {
  outvector[i]<-invector[i]*outvector[i-1]
 }
}
 
return(outvector)
 
}

#-----------------------------------------------------------------------
-------------------------
--------------------------------------------------------

This is not an offer (or solicitation of an offer) to buy/sell the securities/instruments mentioned or an official confirmation.  Morgan Stanley may deal as principal in or own or act as market maker for securities/instruments mentioned or may advise the issuers.  This is not research and is not from MS Research but it may refer to a research analyst/research report.  Unless indicated, these views are the author's and may differ from those of Morgan Stanley research or others in the Firm.  We do not represent this is accurate or complete and we may not update this.  Past performance is not indicative of future returns.  For additional information, research reports and important disclosures, contact me or see https://secure.ms.com/servlet/cls.  You should not use e-mail to request, authorize or effect the purchase or sale of any security or instrument, to send transfer instructions, or to effect any other transactions.  We cannot guarantee that any such requests received via e-mail will be processed in a timely manner.  This communication is solely for the addressee(s) and may contain confidential information.  We do not waive confidentiality by mistransmission.  Contact me if you do not wish to receive these communications.  In the UK, this communication is directed in the UK to those persons who are market counterparties or intermediate customers (as defined in the UK Financial Services Authority's rules).

	[[alternative HTML version deleted]]

