How can I change this code to plot finger below without line red coler

clc;
clear all;
close all;

fs = 1000;
t = 0:1/fs:0.2;

Im = 504.38; % Volt
f0 = 60 ;% Hz
q = 0.5 ; % Voltage Gain
a=0.5;
alpha = 0;

Ia = Im*q*(a*(cos(2*pi*f0*t + alpha)))+((1-a)*(cos(2*pi*f0*t + alpha)));
Ib = Im*(q - 0.2*q*(t>= 0.1)).*(a*(cos(2*pi*f0*t + alpha)))+((1-a)*(cos(2*pi*f0*t + alpha)));
figure,
plot(t,Ia,'r',t,Ib,'b');
xlabel('Time');
ylabel('Ia and Ib');

Answer 1

[Bshara Murr]

clc; clear all; close all;

fs = 1000; t = 0:1/fs:0.2;

Im = 504.38; % Volt 
f0 = 60 ;% Hz 
q = 0.5 ; % Voltage Gain 
a=0.5; 
alpha = 0;

Ia = Im*q*(a*(cos(2*pi*f0*t + alpha)))+((1-a)*(cos(2*pi*f0*t + alpha))); 
Ib = Im*(q - 0.2*q*(t>= 0.1)).*(a*(cos(2*pi*f0*t + alpha)))+((1-a)*(cos(2*pi*f0*t + alpha)));

plot(t,Ib,'b'); xlabel('Time'); ylabel('Ia and Ib');