change the color of curve from blue to any color and make it bold

1. 

[Ganesh]

Hi @Ghazi,

Since your question is pretty straight forward, I would suggest you to go through the MATLAB Documentation:

https://www.mathworks.com/help/matlab/ref/plot.html#d126e1214907

[Ghazi]

thank you

Answer 1

[Aquatris]

x= 0:0.01:2*pi;
y = sin(x);
plot(x,y,'r') % r stands for red look at the documentation for different colors

[Ghazi]

thank you

Answer 2

[Image Analyst]

You can specify the color as a 3 element vector with values between 0 and 1, or use one of the built in colors like 'r':

y = rand(1, 8)+5; % Sample data
darkGreen = [0.1, 0.5, 0.2]; % Define your custom color.
plot(y, 'Color', darkGreen, 'LineWidth', 4); % Plot using numerical vector
hold on;
plot(1:8, 'm-', 'LineWidth', 4); % Plot using built-in color code.

[Ghazi]

thank you