Resize a list on Ti-83+

[thecoolman5]

hi, i know that a Ti-83+ isn't a tablet or a mobile device but this is the closest forum that i could find. I want to resize a list on a Ti-83+. i know that using the dim( command you can resize a list but I need to do something like this - lets say that L1 = {4,6,8,4,7}. using the dim command would do this: 3->dim(L1). L1 now turns into {4,6,8}. the paranthesis indicate what numbers are being resaved into L1: {(4,6,8),4,7}. i need the dim command to do this: 3->dim(L1), and then L1 = {8,4,7}. Its taking {4,6,(8,4,7)} and resaving them into L1. so what im trying to say is i need the dim( command to work backwards. any solutions?