Table: calculate the intermediate variable but not list them

Question

I want to list {a,c} but c is depend on b, suppose the dependence on b can not written as a simple function c(b). How can I create a list of {a,c} list without list out b in the intermediate.

My workaround is this:

list = Table[{a, b = a^2, c = b^2}, {a, 0, 10, 1}];
listWanted = list[[All, {1, 3}]]

However suppose the intermediate variable is many, doing this is cumbersome, at least not neat. I just want to calculate these intermediate value but not list them.

Obviously it depends on what you're actually doing (this might be too minimal an example), but you can certainly do list = Table[{a, (a^2)^2}, {a, 0, 10, 1}]. — march, Oct 26 '15 at 03:41
@march I've said that c is can not be written as a simple function of a — an offer can't refuse, Oct 26 '15 at 06:19
Did you understand what I replaced? If so, please write an answer to your own question. :) — J. M.'s missing motivation, Oct 26 '15 at 06:22

score 2 · Answer 1 · answered Oct 26 '15 at 07:04

2

One can using the ; operator to do the evaluation, but suppress the output. So the code can be the following as pointed out in the comment:

Table[{a, b = a^2; c = b^2}, {a, 0, 10, 1}]

answered Oct 26 '15 at 07:04

an offer can't refuse

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Maybe you already know this, but chances are you don't: there is more to ; than one might expect! – sebhofer Oct 26 '15 at 08:57
@sebhofer thank foe the link, can you explain this code using the principal you linked? – an offer can't refuse Oct 26 '15 at 11:41

Table: calculate the intermediate variable but not list them

1 Answers1