Am I using fplot correct?

syms x

y1 = 0.35*exp(-3*x)-0.15*exp(3*x)

fplot(y1,[-10,10])

hold on

y2 = 0.2*cos(3*x)-0.5*sin(3*x)

fplot(y2,[-10,10])

legend('y1','y2')

I want to know if graph y1, y2 are equal so i want to compare them.

But when i execute this code y2 seems to be y=0

help please

Answer 1

[Star Strider]

The y-axis scales are significantly different, so ‘y2’ will appear to be 0 when it actually is not. Multiply ‘y2’ by a suitably large constant to make it visible:

syms x
y1 = 0.35*exp(-3*x)-0.15*exp(3*x)
fplot(y1,[-1,1]*10)
hold on
y2 = 0.2*cos(3*x)-0.5*sin(3*x)
fplot(y2*1E+11,[-1 1]*10)
hold off
legend('y1','y2\times10^{11}')

.

[Seungwon Lee]

thank you

[Star Strider]

As always, my pleasure!