[source,julia]
--------------------------------------
using Gadfly
x = linspace(0, 2π, 200)
plot(x=x, y = sin(x), Geom.line)
--------------------------------------


image::figures/gadfly_formats_test_sin_fun_1.png[width=600,title="sin(x) function."]
image::figures/gadfly_formats_test_2_1.png[width=600,title="cos(x) function."]
image::figures/gadfly_formats_test_cos2_fun_1.png[width=600]

[source,julia]
--------------------------------------
julia> x = linspace(0, 2π, 200)
200-element LinSpace{Float64}:
 0.0,0.0315738,0.0631476,0.0947214,0.126295,…,6.18846,6.22004,6.25161,6.28319

julia> plot(x=x, y = sin(x), Geom.line)
Plot(...)

--------------------------------------


image::figures/gadfly_formats_test_4_1.png[width=600]

[source,julia]
--------------------------------------
julia> y = 20
20

julia> plot(x=x, y = cos(x), Geom.line)
Plot(...)

--------------------------------------


image::figures/gadfly_formats_test_4_2.png[width=600]

[source,julia]
--------------------------------------
x = linspace(0, 2π, 200)
plot(x=x, y = sin(x), Geom.line)
--------------------------------------


image::figures/gadfly_formats_test_5_1.png[width=15cm]

[source,julia]
--------------------------------------
y = 20
plot(x=x, y = cos(x), Geom.line)
--------------------------------------


image::figures/gadfly_formats_test_5_2.png[width=15cm]