How to create Input dialog box in matlab?

Question

I want to create input dialog box in matlab. I am performing simple addition operation in MATLAB. Two variables name, a and b are needed to be given by user and then performing addition c=a+b; and display it in output. Both a and b should be positive integer only. I tried following:

    a = inputdlg({'Enter positive integer (a)'});     
    b = inputdlg({'Enter positive integer (b)'});        
    c=a+b;

But it is giving following error:

Undefined function or method 'plus' for input arguments of type 'cell'.

Please suggest how can i code the above program in described way.

Benoit_11 Benoit_11 · Accepted Answer · 2016-02-06T12:49:03

That's because the output of inputdlg is a cell array containing a string; here a 1-cell array.

Hence you need to access the content of the cell array to perform the operation; for example using {curly brackets} : {a} and {b}.

In your case, since you are asking the use for a number, you need to convert the output, which is a string, to an actual number Matlab can use using for instance str2double, which operates on cell arrays

c = str2double(a) + str2double(b)

How to create Input dialog box in matlab?

1 Answers