how to open portcom to use UART ?

hello I want to use UART protocol how ever when I press this command

clc;
instrfind 
clear all;
s= serial ('COM1')
fopen(s)

how ever I get this error :

Open failed: Port: COM13 is not available. No ports are available.

Use INSTRFIND to determine if other instrument objects are connected to the requested device.

as I undestand is that the portcom is closed :

Instrument Object Array

Index: Type: Status: Name:

1 serial closed Serial-COM11

2 serial closed Serial-COM13

3 serial closed Serial-COM13

4 serial closed Serial-COM3

5 serial closed Serial-COM3

6 serial open Serial-COM1

7 serial closed Serial-COM1

8 serial closed Serial-COM1

9 serial closed Serial-COM1

10 serial closed Serial-COM1

11 serial closed Serial-COM1

12 serial closed Serial-COM1

13 serial closed Serial-COM1

14 serial closed Serial-COM1

15 serial closed Serial-COM1

16 serial closed Serial-COM1

17 serial closed Serial-COM1

18 serial closed Serial-COM11

how do i opon the portcom ?