````julia
using Gadfly
x = range(0, stop =2π, step=0.05)
plot(x=x, y = sin.(x), Geom.line)
````


![sin(x) function.](figures/gadfly_formats_test_sin_fun_1.svg)

![cos(x) function.](figures/gadfly_formats_test_2_1.svg)

````julia
plot(x=x, y = cos.(2x), Geom.line)
````


![](figures/gadfly_formats_test_cos2_fun_1.svg)