Convert the stereo sound to the mono sound by loading only one channel data into the result vector

Hi, I am having trouble with this code. I want to do what the title says, but I don't know how to load only a single channel into my vector. Can someone help me, please?

the code:

% clear all the previous contents in workspace.

clc; 
clear all;
 
% Read the audio file 
[y, Fs] = audioread(‘Jolly Laugh.wav’ ; % read audio file to array
% Convert the stereo sound to the mono sound by loading only one channel
% data into the result vector
y = y(__________); 
% play the audio 
sound(y,Fs);        
 

Answer 1

[Walter Roberson]

single_channel_from_y = y(:,1);

[Héctor Miguel Ventura Cercado]

Gracias, justo lo necesitaba.