Plot the following function over a given interval:

I am new to MATLAB and having difficulty generating a plot over the interval x = [0,7] for following equation:

This is what I have so far:

fplot(exp(0.5*x)*(2*sin(5*x)-0.6*cos(0.7*x)),[0,7]) 
axis([0,7,-1,1])

Could someone please explain what is wrong with my syntax/formatting? Thank you.

Answer 1

[Star Strider]

If you haven’t, you have to declare x as a symbolic object.

This works (in R2016b):

syms x
fplot(exp(0.5*x)*(2*sin(5*x)-0.6*cos(0.7*x)),[0,7])

[auto2060]

Also this:

fplot(@(x)exp(0.5*x).*(2*sin(5*x)-0.6*cos(0.7*x)),[0,7])  % note the .* after exp(0.5*x)