MATLAB: Warning dialog

Question

I want to use the data below for the logic

Data = 
   ''     ''
   ''     ''
   ''     ''
   ''     ''
if %Data
warndlg('warningstring')
else
end

Answer 1

Look up isempty(). And you probably want to wrap your warndlg inside a uiwait(). If it's like msgbox(), it will continue with your code, blasting right past that warning message unless you put it inside a uiwait().