I'd like to use Table to generate a list of numbers that includes a gap. For instance, this accomplishes what I want:

α = π/2;
X1 = Table[-Q1 + α, {Q1, α, α/√3, -0.01}];
X2 = Table[-Q1 + α, {Q1, -2 α/√3, -2 α/√3 - 1/3, -0.01}];
X = Join[X1, X2];

However, I'd like to do this within one Table line, because I'd like to use Manipulate to run through the list X. Alternatively, is there a straightforward way to use Manipulate with the list X that I currently have. Either would be fine. Thanks.

  • $\begingroup$ As an alternative to the answer by @Johu, you can let a single Table variable go from start to finish with a constant step, but let the expression evaluates to Nothing when the variable is out of an interval. Nothing gets discarded. $\endgroup$
    – BoLe
    Commented Aug 4, 2016 at 13:01
  • $\begingroup$ This might be useful. I'm trying to use the list within a DynamicModule, and I basically need a slider to run over the elements in the list X. I still haven't figured that out... $\endgroup$
    – dpholmes
    Commented Aug 4, 2016 at 13:12

1 Answer 1


I would generate the list of parameters beforehand and use Table[expr,{i,{i1,i2,...}}]

α = π/2;
qList = Range[α, α/√3, -0.01] ~Join~ Range[-2 α/√3, -2 α/√3 - 1/3, -0.01];
X = Table[-Q1 + α, {Q1, qList}];

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