help create a positive sin wave

Hey! need help creating a positive sin wave

[Jan]

What exactly do you call a "positive sine wave"?

[John D'Errico]

A positive sine wave is one who always thinks of the glass as being half full. Of course. ;-)

My guess is Star has the answer, by translating the curve up by a constant. Only a guess though.

Answer 1

[Star Strider]

Perhaps —

syms t 
positive_sine = sin(2*pi*t) + 1

positive_sine = 

figure
fplot(positive_sine, [0 5])
grid
ylim([-1 3])
hold on
yline(0,':k', 'LineWidth',1.5)
hold off

[Viswajit Talluru]

thank you for the help.

[Star Strider]

My pleasure!

Answer 2

[Sam Chak]

Sounds intriguing. Are you looking for the half-wave rectified sine wave?

x  = -2:0.01:2;
y1 = sin(pi*x);                         % full sine wave
y2 = sin(pi*x).*heaviside(sin(pi*x));   % half-wave rectified sine wave
plot(x, y1, '--'), hold on,
plot(x, y2, 'linewidth', 1.5), grid on, ylim([-1.5 1.5])

[Viswajit Talluru]

Thank you for the help.