Variable into a constsant for a plot

Question

0 个投票

Hi,

I am trying to plot an equation with two variales but setting one variable as a constant for the plot.

Here is the code i have tried so far:

syms w sol(t)
sol(t) = (1/(400-w^2)) * (sin(w*t) - (w/20)*sin(20*t))
for w=5:10
    fplot(sol(t))
    hold on
end
hold off

Here is something else I have tried with a simplied version of the problem:

syms y(x) a
y(x) = a*x
a = 1
fplot(y(x))

OR

syms y(x) a
y(x) = a*x
assume(a==1)
fplot(y(x))

Thanks in advance for any help you can give.

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Answer 1

0 个投票

The function you want to use is

subs(s,old,new)

Check out how to use it here

Jack 2021-2-19

Thank you patrick.

clear
syms y(x) a
y(x) = a*x
fplot(subs(y,a,3))