Hi Rosaline, I understand that you want to plot the above three discrimenant functions.
This is a possible approach, please adject the below limits accoding to your needs;
x = linspace(0, 10);
f = @(x) ((0.5/sqrt(2*pi))*exp(-(x-1).^2/2));
g = @(x) ((0.5/sqrt(2*pi))*exp(-(x+1).^2/2));
h = @(x) ((0.5/sqrt(2*pi))*exp(-(x-1).^2/2) + (0.5/sqrt(2*pi))*exp(-(x+1).^2/2));
figure
plot(x, [f(x); g(x); h(x)])
grid
legend('f(x)','g(x)', 'h(x)', 'Location','best')
Output for above code snippet:
Please also check; https://www.mathworks.com/help/matlab/ref/plot.html.
Hope it's helpful.
-Ram
