Graph an exponential equation

Question

0 个投票

Please help me graph this equation

2 个评论
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Ive J 2020-12-8

What have you tried so far?

Trang To 2020-12-8

x = linspace(0,2*pi,100);
y = exp(1)^(-0.005*x).*cos(0.05*(2000-0.01*x^2)^(0.05))-0.01;
plot(x,y)
I have some error with this

Answer 1

Ameer Hamza 2020-12-8

编辑：Ameer Hamza 2020-12-8

0 个投票

You can use fsolve() for such problems. For example

fun = @(x) exp(-0.005*x).*cos(0.05*(2000-0.01*x.^2).^(0.05))-0.01
sol = fsolve(fun, rand())

Note that, the code you included in your question contain exp(1)^(-0.005*x). That is very inefficient.

If you just want to graph it then try

x = linspace(0,2*pi,100);
y = exp(-0.005*x).*cos(0.05*(2000-0.01*x.^2).^(0.05))-0.01;
plot(x,y)

Note that I have replaced * with .* and ^ with .^. Read about element-wise operators here: https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

Trang To 2020-12-8

thank you so much