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How to plot f: y=e^-x.sin^2x function in matlab?

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Lenka Labikova
Lenka Labikova on 17 Nov 2020
Commented: Lenka Labikova on 18 Nov 2020
f: y=e^-x.sin^2x
Please help my computer gives errors and I don't know how to fix them.

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Answers (2)

Adam Danz
Adam Danz on 17 Nov 2020
Edited: Adam Danz on 17 Nov 2020
Errors to fix (numbers refer to the characters above the numbers)
f: y=e^-x.sin^2x
% 1 2 34 5
  1. f: is not valid matlab syntax. You mean f=
  2. if e is a variable, this is OK but if you're looking for exponent, use exp(-x)
  3. x.sin is not valid matlab syntax. If you want multiplication, use x*sin (see next point)
  4. if 'sin' is a variable, then sin^2 is ok but it's a horrible variable name. If you want to use the sin function, use sin(__)
  5. 2x is not valid matlab syntax. Use 2*x if x is a scalar or 2.*x if x is an array. Or, sin(x)^2

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Bastian Arturo Romero Mardones
Edited: Bastian Arturo Romero Mardones on 17 Nov 2020
You should try this
x = 0:1e-3:10
y=exp(-x).*sin(x).^2;
plot(x,y)

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