julia lang - Plots.jl: plots inside for cycle -

i using plots.jl gr backend.

for whatever, cannot seem able plot! inside for-loop:

using plots fn(m,x) = m*x plot([0, 10], [fn(1, 0), fn(1, 10)]) m in 2:4     plot!([0, 10], [fn(m, 0), fn(m, 10)]) end 

oddly enough, same thing without using cycle works:

using plots fn(m,x) = m*x plot([0, 10], [fn(1, 0), fn(1, 10)]) plot!([0, 10], [fn(2, 0), fn(2, 10)]) plot!([0, 10], [fn(3, 0), fn(3, 10)]) plot!([0, 10], [fn(4, 0), fn(4, 10)]) 

that because plotting happens when plot object returned console, implicitly calls base.display function. display method on plot object generates plot see. objects generated within for cycle aren't automatically returned console, means can't see plot; can display them explicitly calling display:

using plots fn(m,x) = m*x plot([0, 10], [fn(1, 0), fn(1, 10)]) m in 2:4      display(plot!([0, 10], [fn(m, 0), fn(m, 10)])) end 

or

p = plot([0, 10], [fn(1, 0), fn(1, 10)]) m in 2:4      plot!(p, [0, 10], [fn(m, 0), fn(m, 10)]) end p