Re: Adding value to some elements of a list

*To*: mathgroup at smc.vnet.net*Subject*: [mg131058] Re: Adding value to some elements of a list*From*: Kurt TeKolste <ektekolste at gmail.com>*Date*: Thu, 6 Jun 2013 07:51:50 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-outx@smc.vnet.net*Delivered-to*: mathgroup-newsendx@smc.vnet.net*References*: <komoi3$1un$1@smc.vnet.net>

I am afraid that the answer is much easier than so far offered. Setup In[8]:= a=10 Range[6] Out[8]= {10,20,30,40,50,60} In[9]:= b=2Range[3] Out[9]= {2,4,6} Here is what you are looking for In[10]:= a[[b]]+=17 Out[10]= {37,57,77} Check resultIn[11]:= a Out[11]= {10,37,30,57,50,77} Kurt