gnuplot: plot doesn't show completely on larger xrange

Question

I want to plot the following function:

reset
set terminal svg enhanced \
fname 'Times-Roman' fsize '10'
set output "test.svg"
A = 0.166735265541426
E = 27.3
F = 0.0244
f(x) = (0 < x && x < 2) ? T+((A/(E*sqrt(F*x)))*exp(-0.00003025/(x*F))) : 1/0

with

set xrange [-0.1:0.5]

I want to plot with

plot f(x) t 'lit' ls 1 lw 2 lt rgb "green"

What I get is the following

But I am also interested in the part you can only see with a smaller xrange:

set xrange [-0.005:0.01]

Does anyone know what the problem is and how to fix it?

Thanks in advance.

Answer 1

You can increase the number of samples:

set samples 1000         # or even 10000

This is the result with T=58:

You might want to use something like set xrange [1e-5:10]; set logscale x.