How can I combine 2D slider with MatrixPlot?

Question

If I enter MatrixPlot[{{1, 2}, {3, 4}}]，it shows:

How can I combine this with a 2D slider，when I move the slider to a region，it could show me the value that correspond to the matrix?

@J.M. - I actually like faleichik's Dynamic version in the linked post (duplicate?) better than the Tooltip-based accepted answer — Jason B., Aug 12 '16 at 18:45
I think it's a dupe, @Jason, but I'll let other people vote... and yes, faleichik's solution is lovely. — J. M.'s missing motivation, Aug 12 '16 at 18:46
@BoLe - No worries at all. I think it's often more fun to come up with an answer before closing a duplicate — Jason B., Aug 12 '16 at 18:56

score 2 · Answer 1 · answered Aug 12 '16 at 18:44

2

By "slider", do you mean locator?

m = RandomInteger[{1, 100}, {10, 10}];

With[{eps = .1},
 DynamicModule[{p = {.5, .5}, lab},
  lab[{x_Integer, y_Integer}] :=
   Style[StringJoin[{"value: ",
      ToString[m[[Length[m] - y, x + 1]]]}], 16, Bold];
  LocatorPane[
   Dynamic[p],
   MatrixPlot[m,
    PlotLabel -> Dynamic[lab@Floor@p]],
   {{eps, eps}, Dimensions[m] - eps}]]]

answered Aug 12 '16 at 18:44

BoLe

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That's exactly what I want! Amazing! Thank you very much. – Tsai Aug 13 '16 at 00:01

How can I combine 2D slider with MatrixPlot?

1 Answers1