Hello,
Here is an example use case for me. I have several directories with data. I
want to step through each directory, do some work, and plot some result;
all in the same figure:
for dir in directories
... do some work ...
plot(result)
end
Clearly it would be inconvenient if every time I have to do this (which is
all the time) I had to make sure that the first set of results runs
``plot()`` and the others run ``plot!()``. How would you deal with this
using Plots.jl? The solution I can come up with is:
plot() # Plot nothing.
for dir in directories
... do some work ...
plot!(result)
end
I guess that would be the best option.
Cheers,
Daniel.
On 8 April 2016 at 15:07, Tom Breloff <[email protected]> wrote:
>
>
> On Fri, Apr 8, 2016 at 3:44 AM, Daniel Carrera <[email protected]> wrote:
>
>> Hello,
>>
>> I was looking through the API for Plots.jl
>>
>> http://plots.readthedocs.org/en/latest/#api
>>
>
> If you look just above that, note that I put a big warning that this
> section of the docs need updating. Personally, I hardly ever use those
> mutating methods; but some people prefer that style, so I make it available.
>
>
>> Maybe I'm the only one, but I think all those exclamation marks are a bit
>> extraneous and feel like syntactic noise.
>>
>
> It modifies a plot, and so follows Julia convention. Anything else is
> likely to induce confusion.
>
>
>> I have been following Plots.jl because I'm interested in plotting. My use
>> of Julia comes down to either making plots, or post-processing data so I
>> can make a plots. I get the idea from Plots.jl that functions that end in
>> an exclamation mark are supposed to modify an existing plot. So you get
>> things like:
>>
>> plot!(...) # Add another plot to an existing one.
>> title!(...)
>> xaxis!("mylabel", :log, :flip)
>> xlims!(...)
>> xticks!(...)
>>
>
> If you don't want to plot like this, then don't! There's a million ways
> to produce the same plot. If you want to put all your commands in one
> line, this will work: plot(rand(10), title="TITLE", xaxis = ("mylabel",
> :log, :flip, (0, 20), linspace(1, 10, 20)))
>
> [image: Inline image 1]
> Plots figures out that log is the scale, (0,20) is the axis limits, and
> linspace(1,10,20) are the tick marks, which reduces a ton of clutter (not
> to mention you don't need to remember a complicated API). One of the key
> goals of Plots is that you can use whatever style suits you. (and feel
> free to open issues if there's something that you think can be more
> intuitive)
>
>
>> In PyPlot, all commands edit the current plot unless you explicitly call
>> `figure()` to create a new plot. You can also use clf() to clear the
>> current plot. I think this is something that PyPlot / Matplotlib get right.
>>
>
> We can agree to disagree on this point. It's clunky and error-prone.
>
> Quick tip: you can choose to reuse PyPlot windows by default if you want:
>
> # these will effectively call clf() before each command
>>
> using Plots
>
> pyplot(reuse = true)
>> plot(rand(10))
>> plot(rand(10))
>> plot(rand(10))
>
>
>
> - Tom
>
