PLOT log scale in y cordinate

i have this equation and i want ger the relation between Xss and W

-3751474221736597/(2621440*(17179869184*W^2 - 336973579165665))

my code is

syms W

W=0:200:2000;

figure

semilogy(W,Xss)

but this error is appear

Error using semilogy

A numeric or double convertible argument is expected

Answer 1

[Star Strider]

Try this (using the fplot function):

syms W
Xss = -3751474221736597/(2621440*(17179869184*W^2 - 336973579165665));
figure
fplot(Xss, [0 2000])
set(gca, 'YScale','log')

[Mustafa Alhandhali]

i tried

it does not work with me

Error in fplot (line 60)

fun = fcnchk(fun);

[Star Strider]

It ran for me as posted without error.

Post your code so I can see what the problem is.