zhang yanwei princetonmram yzhangmunichreamericacom hi easy way cumulative matrix multipliation r whats syntex thanks sincerely yanwei zhang department actuarial research modeling munich america tel 6092752176 email yzhangmunichreamericacom alternative html version deleted ______________________________________________ rhelprprojectorg mailing list httpsstatethzchmailmanlistinforhelp please read posting guide httpwwwrprojectorgpostingguidehtml provide commented minimal selfcontained reproducible code wed 06 aug 2008 170202 0400 r matrix multiplication