Assume there is a list like:


I want to convert the ma to a GUI which asks me about the values of L1,r1,L2 and r2 and then allows me to assign values to L1,r1,L2 and r2 as follows:

L1=2    r1=0.5
L2=4    r2=0.1

Then new matrix ma will be:


I have no idea how to do that in Mathematica software! Could you please help me with it ?!

** EDITED **

This is my code for the problem:

AskUser =
DialogInput[{L1 = "", r1 = "", L2 = "", r2 = ""}, 
Column[{"L1", InputField[Dynamic[L1], Number], "r1", 
 InputField[Dynamic[r1], Number], "L2", 
 InputField[Dynamic[L2], Number], "r2", 
 InputField[Dynamic[r2], Number], 
 Button["Proceed", DialogReturn[{{L1, r1}, {L2, r2}}], 
  ImageSize -> Automatic]}]];

Suggested code works properly. However, the ma matrix is not a fixed array matrix. For example it can be like:


In other words, the ma matrix is a variable matrix whose general form is like :


(Thanks SquareOne for the help) **EDITED**

Now my question is how I can program a UI which can adapt itself with the ma changes in arrays and can accept both Numbers and Symbols for the input fields and having label names beside the input fields?

  • 1
    $\begingroup$ Take a look at this tutorial: Creating Dialog Boxes $\endgroup$
    – MarcoB
    Jun 30, 2015 at 14:00
  • 1
    $\begingroup$ Maybe see How to efficiently get the value from form UI built with dynamic InputField $\endgroup$
    – SquareOne
    Jun 30, 2015 at 16:22
  • $\begingroup$ @SquareOne : Thank you so much for your help. The mentioned link is similar to my problem. However, mine is a little bit different. The major problem is that the input box for my problem could be Number or Symbol. The other different is that I also need Label above the input field. $\endgroup$
    – Shellp
    Jun 30, 2015 at 19:09

1 Answer 1


Implementation 1

This should produce the desired GUI.

askUser[matrix_] := DialogInput[
    Grid[{ToString@#1, InputField[Dynamic[#1], FieldSize -> Tiny], 
        ToString@#2, InputField[Dynamic[#2], FieldSize -> Tiny]} & @@@
       matrix, Alignment -> Left], 
    Row[{CancelButton[], DefaultButton[DialogReturn[matrix]]}]

ma = {{L1, r1}, {L2, r2}};

enter image description here


{{1, r1}, {L2, 2}}

ma = {{L11, r11}, {L22, r22}, {L33, r33}};

enter image description here

{{1, r11}, {L22, 0}, {1, r33}}

It is important to note, that with this implementation the values put into the GUI are assigned to the corresponding parameters of the matrix.

Implementation 2

The GUI of this implementation looks the same as the first one, however no values will be Set to the symbols used in the input matrix.

askUser2[matrix_] := 
  DynamicModule[{localMatrix = ConstantArray[0, Dimensions@matrix]},
      Array[Sequence @@ {ToString@matrix[[#, #2]], 
          InputField[Dynamic@localMatrix[[#, #2]], 
           FieldSize -> Tiny]} &, Dimensions@matrix], 
      Alignment -> Left], 
     Row[{CancelButton[], DefaultButton[DialogReturn[localMatrix]]}]

Additionally the possible shapes of the input matrix is less restricted.


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