Call from .mat to GUI text

Hello, I have a function that counts the objects in an image from a web-cam every 30 minutes. (it's an infinite loop, but i make it stop at three for testing) What I want to do is to display in my GUI text-box and being always updated.

But I don't know how to call the values from the matrix of the counteds objects.

Thank for your help.

CODE:

function CalculaParticulas

vid = videoinput('winvideo', 1,'I420_1280x720');
set(vid,'ReturnedColorSpace','grayscale');

Densidad=1000;
VolumenMAX=pi*1000/(8E18);
VolumenMIN=pi*15.625/(8E18);
Caudal=0.01; %m3/min

i=1;

pause(2);%Dejamos 32 minutos de margen antes de empezar (en segundos)

while (1);

      img{i} = getsnapshot(vid);
      fname = ['img' num2str(i)];%que nombre le ponemos al archivo
      imwrite(img{i}, fname, 'jpg');%guardar el archivo con formato

      pause(2);%paramos 3minutos entre foto y análisis

      img{i} = imread(['img' num2str(i)]);
  %         %imshow(img1)% Si queremos ver la imagen original
      img2{i}=im2bw(img{i},graythresh(img{i}));
      img2{i}=~img2 {i};
      B=bwboundaries(img2 {i});
      NumberOfParticle(i)=length(B);
  %     disp(['Hay ', num2str(NumberOfParticle), ' partículas'])

          %hold on

              %for k = 1:length(B)
                  %boundary = B{k};
                  %plot(boundary(:,2), boundary(:,1), 'g', 'LineWidth', 0.2);
              %end

      Concentracion(i,1)=NumberOfParticle(i)*VolumenMAX*Densidad/Caudal

      Concentracion(i,2)=NumberOfParticle(i)*VolumenMIN*Densidad/Caudal

      Concentracion(i,3)=(Concentracion(i,1)+Concentracion(i,2))/2

save('concentracion.mat','Concentracion');

      i=i+1;

      pause(5); %esperamos 27'

      if i==3;
          break;
      end

end

CODE GUI

function varargout = Interfaz(varargin)
% INTERFAZ MATLAB code for Interfaz.fig
%      INTERFAZ, by itself, creates a new INTERFAZ or raises the existing
%      singleton*.
%
%      H = INTERFAZ returns the handle to a new INTERFAZ or the handle to
%      the existing singleton*.
%
%      INTERFAZ('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in INTERFAZ.M with the given input arguments.
%
%      INTERFAZ('Property','Value',...) creates a new INTERFAZ or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before Interfaz_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to Interfaz_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help Interfaz

% Last Modified by GUIDE v2.5 27-Mar-2014 09:17:01

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @Interfaz_OpeningFcn, ...
                   'gui_OutputFcn',  @Interfaz_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT

% --- Executes just before Interfaz is made visible.
function Interfaz_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to Interfaz (see VARARGIN)

% Choose default command line output for Interfaz
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes Interfaz wait for user response (see UIRESUME)
% uiwait(handles.figure1);

load(concentracion);

% --- Outputs from this function are returned to the command line.
function varargout = Interfaz_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% --- Executes when selected object is changed in uipanel2.
function uipanel2_SelectionChangeFcn(hObject, eventdata, handles)
% hObject    handle to the selected object in uipanel2 
% eventdata  structure with the following fields (see UIBUTTONGROUP)
%  EventName: string 'SelectionChanged' (read only)
%  OldValue: handle of the previously selected object or empty if none was selected
%  NewValue: handle of the currently selected object
% handles    structure with handles and user data (see GUIDATA)

if (hObject==handles.radiobutton1)
    set (handles.text4, 'String', num2str(concentracion(end,3))); %i think it is not correct, but don't know what put here

elseif (hObject==handles.radiobutton2)
    set (handles.text4, 'String', num2str(concentracion(end,3)));

end;