Re: List element extraction

*To*: mathgroup at smc.vnet.net*Subject*: [mg53638] Re: List element extraction*From*: highegg at centrum.cz (highegg)*Date*: Fri, 21 Jan 2005 06:35:45 -0500 (EST)*References*: <bkfutxi8t201@legacy>*Sender*: owner-wri-mathgroup at wolfram.com

Cases[yourlist, {x -> a_} -> a/2, 2] On 12 Jan 05 15:54:05 -0500 (EST), Trinanjan Datta wrote: >How do I extract the x values from the following list and divide them >by 2: > >{{120.664, {x -> -4.64844}}, { > 118.131, {x -> -4.4542}}, {115.479, {x -> -4.25828}}, { > 112.697, {x -> -4.06053}}, {109.766, {x -> -3.8606}}, { > 106.666, {x -> -3.65812}}, { > 103.372, {x -> -3.45257}}, {99.8501, {x -> -3.24323}}, { > 96.0571, {x -> -3.02915}}, { > 91.9343, {x -> -2.80902}}, {87.3996, {x -> -2.58106}}, { > 82.3355, {x -> -2.34305}}, {76.5712, {x -> -2.09251}}, { > 69.8594, {x -> -1.8273}}, {61.8567, {x -> -1.54659}}, { > 52.1348, {x -> -1.25235}}, {40.3287, {x -> -0.952531}}, { > 26.7404, {x -> -0.66784}}, {13.703, {x -> -0.434276}}, { > 5.08285, {x -> -0.270745}}, {1.45243, {x -> -0.152066}}}