spb.plotgrid.plotgrid(*args, **kwargs)[source]

Combine multiple plots into a grid-like layout. This function has two modes of operation, depending on the input arguments. Make sure to read the examples to fully understand them.


A sequence of aldready created plots. This, in combination with nr and nc represents the first mode of operation, where a basic grid with (nc * nr) subplots will be created.

nr, ncint, optional

Number of rows and columns. By default, nc = 1 and nr = -1: this will create as many rows as necessary, and a single column. By setting nr = 1 a grid with a single row and as many columns as necessary will be created.

gsdict, optional

A dictionary mapping Matplotlib’s GridSpec objects to the plots. The keys represent the cells of the layout. Each cell will host the associated plot. This represents the second mode of operation, as it allows to create more complicated layouts.

imagegridboolean, optional

Requests Matplotlib’s ImageGrid axes [2] to be used. This is best suited for plots with equal aspect ratio sharing a common colorbar. Default to False.

panel_kwdict, optional

A dictionary of keyword arguments to be passed to panel’s GridSpec for further customization. Default to dict(sizing_mode="stretch_width"). Refer to [1] for more information.

showboolean, optional

It applies only to Matplotlib figures. Default to True.

figplt.Figure or pn.GridSpec

If all input plots are instances of MatplotlibBackend, than a Matplotlib Figure will be returned. Otherwise an instance of Holoviz Panel’s GridSpec will be returned.



First mode of operation with instances of MatplotlibBackend:

from sympy import symbols, sin, cos, tan, exp, sqrt, Matrix, gamma, I
from spb import *

x, y, z = symbols("x, y, z")
p1 = plot(sin(x), backend=MB, title="sin(x)", show=False)
p2 = plot(tan(x), backend=MB, adaptive=False, detect_poles=True,
     title="tan(x)", show=False)
p3 = plot(exp(-x), backend=MB, title="exp(-x)", show=False)
plotgrid(p1, p2, p3)

(Source code, png)


When plots represents images with equal aspect ratio and common colorbar, set imagegrid=True:

from sympy import symbols, sin, cos, pi, I
from spb import *
z = symbols("z")
options = dict(coloring="b", show=False, grid=False)
p1 = plot_complex(sin(z), (z, -pi-pi*I, pi+pi*I), **options)
p2 = plot_complex(cos(z), (z, -pi-pi*I, pi+pi*I), **options)
plotgrid(p1, p2, nr=1, imagegrid=True)

(Source code, png)


Second mode of operation, using Matplotlib GridSpec:

from sympy import *
from spb import *
from matplotlib.gridspec import GridSpec
x, y, z = symbols("x, y, z")
p1 = plot(sin(x), cos(x), adaptive=False, show=False)
expr = Tuple(1, sin(x**2 + y**2))
p2 = plot_vector(expr, (x, -2, 2), (y, -2, 2),
     streamlines=True, scalar=False, use_cm=False,
     title=r"$\vec{F}(x, y) = %s$" % latex(expr),
     xlabel="x", ylabel="y", show=False)
p3 = plot_complex(gamma(z), (z, -3-3*I, 3+3*I), title=r"$\gamma(z)$",
     grid=False, show=False)

gs = GridSpec(3, 4)
mapping = {
    gs[2, :]: p1,
    gs[0:2, 0:2]: p2,
    gs[0:2, 2:]: p3,

(Source code, png)


Interactive-widget plotgrid with first mode of operation, illustrating:

  • plotgrid accepts interactive plots.

  • the use of the prange class (parametric range).

  • the same interactive module, imodule, must be used on the plots as well as on the plotgrid. Here, imodule="panel" has been used, but users can change it to imodule="ipywidgets", provided that %matplotlib widget is executed first.

from sympy import *
from spb import *
from import a, b, c, d, x
imodule = "panel"
options = dict(
    imodule=imodule, show=False, params={
        a: (1, 0, 2),
        b: (5, 0, 10),
        c: (0, 0, 2*pi),
        d: (10, 1, 20)

p1 = plot(sin(x*a + c) * exp(-abs(x) / b), prange(x, -d, d), **options)
p2 = plot(cos(x*a + c) * exp(-abs(x) / b), (x, -10, 10), **options)
plotgrid(p1, p2, imodule=imodule)

(Source code, small.png)