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let plot ?color ?linewidth ?linestyle ?marker ?label ~x ~y ax =
let artist = Artist.line2d ?color ?linewidth ?linestyle ?marker ?label x y in
Axes.add_artist artist ax
let plot_y ?color ?linewidth ?linestyle ?marker ?label ~y ax =
let n_elements =
match Nx.shape y with
| [| size |] -> size
| _ ->
Printf.eprintf
"Warning: Plotting.plot_y requires a non-empty 1D Nx. Skipping.\n%!";
0
in
if n_elements <= 0 then ax
else
let x_data =
Nx.create Nx.float32 [| n_elements |]
(Array.init n_elements (fun i -> float_of_int i))
in
plot ?color ?linewidth ?linestyle ?marker ?label ~x:x_data ~y ax
let plot3d ?color ?linewidth ?linestyle ?marker ?label ~x ~y ~z ax =
if ax.Axes.projection <> Axes.ThreeD then
Printf.eprintf "Warning: Calling plot3d on a 2D Axes object.\n%!";
let artist =
Artist.line3d ?color ?linewidth ?linestyle ?marker ?label x y z
in
Axes.add_artist artist ax
let scatter ?s ?c ?marker ?label ~x ~y ax =
let artist = Artist.scatter ?s ?c ?marker ?label x y in
Axes.add_artist artist ax
let bar ?width ?(bottom = 0.0) ?color ?label ~x ~height ax =
let artist = Artist.bar ?width ~bottom ?color ?label ~height x in
let ax = Axes.add_artist artist ax in
let current_ymin_opt, _ = ax.Axes.ylim in
if current_ymin_opt = None then Axes.set_ylim ~min:bottom ax else ax
let hist ?(bins = `Num 10) ?range ?(density = false) ?color ?label ~x ax =
let x_min, x_max =
match range with
| Some (min_val, max_val) -> (min_val, max_val)
| None ->
let min_val = Nx.min x |> Nx.item [] in
let max_val = Nx.max x |> Nx.item [] in
(min_val, max_val)
in
let edges =
match bins with
| `Num n ->
Array.init (n + 1) (fun i ->
x_min +. ((x_max -. x_min) *. float_of_int i /. float_of_int n))
| `Edges arr -> arr
in
let num_bins = Array.length edges - 1 in
if num_bins <= 0 then invalid_arg "Plotting.hist: Must have at least one bin";
let counts = Array.make num_bins 0. in
let total_count = ref 0. in
Nx.iter_item
(fun v ->
if v >= x_min && v <= x_max then (
total_count := !total_count +. 1.;
let bin_idx = ref (-1) in
for i = 0 to num_bins - 1 do
if
v >= edges.(i)
&& (v < edges.(i + 1) || (i = num_bins - 1 && v <= edges.(i + 1)))
then bin_idx := i
done;
if !bin_idx >= 0 then counts.(!bin_idx) <- counts.(!bin_idx) +. 1.0))
x;
let bar_heights, _bar_widths, bar_centers =
let heights = Array.make num_bins 0. in
let widths = Array.make num_bins 0. in
let centers = Array.make num_bins 0. in
for i = 0 to num_bins - 1 do
let width = edges.(i + 1) -. edges.(i) in
widths.(i) <- width;
centers.(i) <- edges.(i) +. (width /. 2.0);
heights.(i) <-
(if density then
if width > 1e-9 && !total_count > 0. then
counts.(i) /. !total_count /. width
else 0.
else counts.(i))
done;
(heights, widths, centers)
in
let height = Nx.create Nx.float32 [| num_bins |] bar_heights in
let bar_centers = Nx.create Nx.float32 [| num_bins |] bar_centers in
let bar_artist = Artist.bar ?color ?label ~height bar_centers in
let modified_ax = Axes.add_artist bar_artist ax in
let current_ymin_opt, _ = modified_ax.Axes.ylim in
if current_ymin_opt = None then Axes.set_ylim ~min:0.0 modified_ax
else modified_ax
let imshow ?cmap ?aspect ?extent ~data ax =
let artist = Artist.image ?extent ?cmap ?aspect data in
Axes.add_artist artist ax
let text ?color ?fontsize ~x ~y text_content ax =
let artist = Artist.text ?color ?fontsize ~x ~y text_content in
Axes.add_artist artist ax
let errorbar ?yerr ?xerr ?(ecolor = Artist.Color.black) ?(elinewidth = 1.0)
?(capsize = 3.0) ?(fmt : Artist.plot_style option) ?label ~x ~y ax =
let default_color = Artist.Color.blue in
let default_linewidth = 1.5 in
let default_linestyle = Artist.Solid in
let default_marker = Artist.Circle in
let final_color, final_linewidth, final_linestyle, final_marker =
match fmt with
| None ->
(default_color, default_linewidth, default_linestyle, default_marker)
| Some style ->
( Option.value style.fmt_color ~default:default_color,
Option.value style.fmt_linewidth ~default:default_linewidth,
Option.value style.fmt_linestyle ~default:default_linestyle,
Option.value style.fmt_marker ~default:default_marker )
in
let base_line : Artist.line2d =
Artist.
{
xdata = x;
ydata = y;
color = final_color;
linewidth = final_linewidth;
linestyle = final_linestyle;
marker = final_marker;
label;
}
in
let error_style : Artist.errorbar_style =
{ yerr; xerr; color = ecolor; linewidth = elinewidth; capsize }
in
let n = Nx.size x in
let validate_err name arr_opt =
match arr_opt with
| Some arr when Nx.size arr <> n ->
invalid_arg
(Printf.sprintf
"Plotting.errorbar: %s length (%d) must match x/y data length (%d)"
name (Nx.size arr) n)
| _ -> ()
in
validate_err "yerr" yerr;
validate_err "xerr" xerr;
let artist = Artist.Errorbar (base_line, error_style) in
Axes.add_artist artist ax
let step ?color ?linewidth ?linestyle ?where ?label ~x ~y ax =
let artist = Artist.step ?color ?linewidth ?linestyle ?where ?label x y in
Axes.add_artist artist ax
let fill_between ?color ?where ?interpolate ?label ~x ~y1 ~y2 ax =
let artist = Artist.fill_between ?color ?where ?interpolate ?label x y1 y2 in
Axes.add_artist artist ax
let matshow ?cmap ?aspect ?extent ?(origin = `upper) ~data ax =
let img_artist = Artist.image ?cmap ?aspect ?extent data in
let _ = Axes.add_artist img_artist ax in
let shape = Nx.shape data in
let rows, cols =
match shape with
| [| r; c |] -> (float r, float c)
| _ -> invalid_arg "matshow requires 2D data"
in
let default_extent = (-0.5, cols -. 0.5, rows -. 0.5, -0.5) in
let final_extent = Option.value extent ~default:default_extent in
let d0, d1, d2, d3 = final_extent in
let _ = Axes.set_xlim ~min:d0 ~max:d1 ax in
let ymin, ymax = if origin = `upper then (d2, d3) else (d3, d2) in
let _ = Axes.set_ylim ~min:ymin ~max:ymax ax in
let xticks = List.init (int_of_float cols) float_of_int in
let yticks = List.init (int_of_float rows) float_of_int in
let _ = Axes.set_xticks xticks ax in
let _ = Axes.set_yticks yticks ax in
ax
let contour ?colors ?linewidths ?linestyles ~levels ~x ~y ~z ax =
let artist = Artist.contour ?colors ?linewidths ?linestyles ~levels x y z in
Axes.add_artist artist ax
let contourf ?cmap ?alpha ~levels ~x ~y ~z ax =
let artist = Artist.contourf ?cmap ?alpha ~levels x y z in
Axes.add_artist artist ax