How to use log scale with fimplicit

Hi everyone, I have to plot an implicit equation and I'm using fimplicit:

fimplicit(@(x,y) cosh((log(2)*(x-1))./((x+1).*y)) - (1/2)*exp(log(2)./y), [1 1000 0 1])

that's ok but I need it on log scale on the x-axis. Is it possibile to use semilogx in this case or something similar?

Thx :)

lorenzo

Answer 1

[Torsten]

x = 0:0.1:1000;
fun = @(x,y) cosh((log(2)*(x-1))./((x+1).*y)) - (1/2)*exp(log(2)./y);
options = optimset('Display','none');
tic
y = fsolve(@(y)fun(x,y),0.5*ones(size(x)),options);
toc

Elapsed time is 21.418050 seconds.

tic
y = arrayfun(@(x)fsolve(@(y)fun(x,y),0.5,options),x);
toc

Elapsed time is 4.687107 seconds.

semilogx(x,y)

[lorenzosilvestri1998]

Thank you :)

Answer 2

[Walter Roberson]

fimplicit(@(x,y) cosh((log(2)*(x-1))./((x+1).*y)) - (1/2)*exp(log(2)./y), [1 1000 0 1])
set(gca, 'XScale', 'log')

[lorenzosilvestri1998]

Thank you :)