Re: second simple problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg99686] Re: second simple problem*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Mon, 11 May 2009 06:24:12 -0400 (EDT)*References*: <gu666q$9tf$1@smc.vnet.net>

Hi, i = 1; ex /. "M" :> rL[[i++]] ? Regards Jens Francisco Gutierrez wrote: > Dear sirs: > I have the following list: > ex={1,5,7,4,"M",6,7,8,9,1,"M",3} > I want to replace the M's in the following way: the first M by 5, and the second by2. > Thus I have a replacement list > rL={5,2} > The problem is to get ={1,5,7,4,5,6,7,8,9,1,2,3} > How can I do this in the most general form (for any length of ex and any number of values of "M")? > Thanks > Francisco >