Representation him evaluates encoders from Arduino-Board with matlab in graphics ( Plot )

Dear All, I make just a project with Microprozessor Arduino-Board and Matlab. I have connected an Encoder with Arduino-Board. I must select worth from encoder with matlab. this is a code of Matlab.

clear all; close all; clc

a = arduino('COM12', 'uno');

configurePin(a,'D2','DigitalInput');

configurePin(a,'D3','DigitalInput');

configurePin(a,'D4','Unset');

%writeDigitalPin(a,'D4',1);

encoderVal = 0;

oldA = 1;

oldB = 1;

%result = 0;

while 1

      result = 0;
      newA = readDigitalPin(a,'D2');
      newB = readDigitalPin(a,'D3');
      if (newA ~= oldA) || (newB ~= oldB) 
          if (oldA == 1) && (newA == 0)
             oldB = oldB
             result = (oldB * 2 - 1);
          end

      end
      oldA = newA;
      oldB = newB;
      change = result
      encoderVal = encoderVal + change
end

I begin code from matlab and if I turn encoder, I agree worth in MATLAB Command Window. now I do not want worth any more in MATLAB Command Window, now in graphics. so that I agree with rotation encoders worth in graphics, so-called plot. I do not know like I can make it. can somebody help me please?

thanks