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I want to have a dynamic number of manipulators. 

             n = 4; c = 4;
             With[{  
                    B_controls = Sequence @@ 
                          Table[ {{ B[i, j], 0}, 0, 1, 0.1}, {i, 1, n}, {j, 1, c} ]
             },

             Manipulate[

Whatever I want to do, and then:

                    Control @ B_controls
                    ]

But I get the following error:

Manipulate::vsform: Manipulate argument {{{B[1,1],1},0,1,0.1},{{B[2,1],1},0,1,0.1}} does not have the correct form for a variable specification.

Manipulate::vsform: Manipulate argument {{{B[1,2],1},0,1,0.1},{{B[2,2],1},0,1,0.1}} does not have the correct form for a variable specification.

It seems like I'd have to do a simple array of controls, but I'd like to know if I can do it in this way (or if there's a better way).

Thanks!

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4
  • $\begingroup$ Got it. Thanks! $\endgroup$
    – Luis Fernando
    Mar 10, 2017 at 19:50
  • $\begingroup$ What does the title—"two dimensional manipulators"—have to do with this question? $\endgroup$
    – David G. Stork
    Mar 10, 2017 at 20:10
  • $\begingroup$ I meant it in the sense that the manipulators are a two dimensional matrix. $\endgroup$
    – Luis Fernando
    Mar 10, 2017 at 20:14
  • $\begingroup$ First of all, "two-dimensional manipulators" refers to SLIDER2D. I think your title should be "Manipulating the number of controls" or something like that. Clearer. Easier for people to find later. $\endgroup$
    – David G. Stork
    Mar 10, 2017 at 21:15

1 Answer 1

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enter image description here

n = 4; c = 4;
With[{t = Table[b[i, j], {i, 1, n}, {j, 1, c}],
  f=Table[{{b[i,j],0},0,1,0.1,ImageSize->Tiny},{i,1,n},{j,1,c}], 
  bControls = 
   Sequence @@ 
    Flatten[ Table[{{b[i, j], 0}, 0, 1, 0.1}, {i, 1, n}, {j, 1, c}],1]},

 Manipulate[MatrixForm@t,bControls,TrackedSymbols :> {t}]
 ]
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2
  • $\begingroup$ Nasser how did you save the gif with the arrow pointer? $\endgroup$
    – Alucard
    Mar 10, 2017 at 22:46
  • $\begingroup$ @Alucard I use program called LICEcap to capture screen to animated gif $\endgroup$
    – Nasser
    Mar 10, 2017 at 23:47

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