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Re: List element extraction


Hi,

lst = {{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}}};

(x /. Cases[lst, {_Rule}, Infinity])/2

??

Regards

  Jens



"Trinanjan Datta" <tdatta at physics.purdue.edu> schrieb im Newsbeitrag 
news:cs5b2r$3rv$1 at smc.vnet.net...
> 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}}}
> 



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