matlab and arduino: serial port connection

Projects Programming
1

Hello, I am trying to hook up matlab to my arduino. I am trying to write a number to the serial port in the arduino IDE and retrieving the same number in the matlab IDE. My arduino code is:

void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}

void loop() {

if (Serial.available()){
Serial.println(3);

delay(100); // delay in between reads for stability
}
}

And my matlab code looks like:

%s = serial('COM9');
s = serial ( 'COM9' , 'BaudRate' , 9600, 'terminator' , 'CR' );
%set(s,'BaudRate',4800);
fopen(s);

fprintf(s,'*IDN?')
fread(s)
disp(s)
out = fscanf(s);
fclose(s)
delete(s)
clear s

and the matlab output looks like:

10
51
13
10
51
13
10
51
13

How can I change this so only "3" comes out?
Thanks!

2

Bearing in mind that I know nothing about matlab what do these 2 lines set the baud rate to ?

s = serial ( 'COM9' , 'BaudRate' , 9600, 'terminator' , 'CR' );
%set(s,'BaudRate',4800);
3

The 10 and 13 are the carriage return and line feed that Serial.println() adds. 51 is the ASCII code for '3'. Stop printing the integer value. Print the character instead.