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Showing content from https://matplotlib.org/3.1.1/api/_as_gen/matplotlib.pyplot.pcolor.html below:

matplotlib.pyplot.pcolor — Matplotlib 3.1.2 documentation

Create a pseudocolor plot with a non-regular rectangular grid.

Call signature:

pcolor([X, Y,] C, **kwargs)

X and Y can be used to specify the corners of the quadrilaterals.

Hint

pcolor() can be very slow for large arrays. In most cases you should use the similar but much faster pcolormesh instead. See there for a discussion of the differences.

Parameters:

C : array_like

A scalar 2-D array. The values will be color-mapped.

X, Y : array_like, optional

The coordinates of the quadrilateral corners. The quadrilateral for C[i,j] has corners at:

(X[i+1, j], Y[i+1, j])          (X[i+1, j+1], Y[i+1, j+1])
                      +--------+
                      | C[i,j] |
                      +--------+
    (X[i, j], Y[i, j])          (X[i, j+1], Y[i, j+1]),

Note that the column index corresponds to the x-coordinate, and the row index corresponds to y. For details, see the Notes section below.

The dimensions of X and Y should be one greater than those of C. Alternatively, X, Y and C may have equal dimensions, in which case the last row and column of C will be ignored.

If X and/or Y are 1-D arrays or column vectors they will be expanded as needed into the appropriate 2-D arrays, making a rectangular grid.

cmap : str or Colormap, optional

A Colormap instance or registered colormap name. The colormap maps the C values to colors. Defaults to rcParams["image.cmap"] = 'viridis'.

norm : Normalize, optional

The Normalize instance scales the data values to the canonical colormap range [0, 1] for mapping to colors. By default, the data range is mapped to the colorbar range using linear scaling.

vmin, vmax : scalar, optional, default: None

The colorbar range. If None, suitable min/max values are automatically chosen by the Normalize instance (defaults to the respective min/max values of C in case of the default linear scaling).

edgecolors : {'none', None, 'face', color, color sequence}, optional

The color of the edges. Defaults to 'none'. Possible values:

'none' or '': No edge.
None: rcParams["patch.edgecolor"] = 'black' will be used. Note that currently rcParams["patch.force_edgecolor"] = False has to be True for this to work.
'face': Use the adjacent face color.
An mpl color or sequence of colors will set the edge color.

The singular form edgecolor works as an alias.

alpha : scalar, optional, default: None

The alpha blending value of the face color, between 0 (transparent) and 1 (opaque). Note: The edgecolor is currently not affected by this.

snap : bool, optional, default: False

Whether to snap the mesh to pixel boundaries.

Returns:

collection : matplotlib.collections.Collection

Other Parameters:

antialiaseds : bool, optional, default: False: The default antialiaseds is False if the default edgecolors="none" is used. This eliminates artificial lines at patch boundaries, and works regardless of the value of alpha. If edgecolors is not "none", then the default antialiaseds is taken from rcParams["patch.antialiased"] = True, which defaults to True. Stroking the edges may be preferred if alpha is 1, but will cause artifacts otherwise.
**kwargs: Additionally, the following arguments are allowed. They are passed along to the PolyCollection constructor:
Property Description agg_filter a filter function, which takes a (m, n, 3) float array and a dpi value, and returns a (m, n, 3) array alpha float or None animated bool antialiased or aa or antialiaseds bool or sequence of bools array ndarray capstyle {'butt', 'round', 'projecting'} clim a length 2 sequence of floats; may be overridden in methods that have vmin and vmax kwargs. clip_box Bbox clip_on bool clip_path [(Path, Transform) | Patch | None] cmap colormap or registered colormap name color color or sequence of rgba tuples contains callable edgecolor or ec or edgecolors color or sequence of colors or 'face' facecolor or facecolors or fc color or sequence of colors figure Figure gid str hatch {'/', '\', '|', '-', '+', 'x', 'o', 'O', '.', '*'} in_layout bool joinstyle {'miter', 'round', 'bevel'} label object linestyle or dashes or linestyles or ls {'-', '--', '-.', ':', '', (offset, on-off-seq), ...} linewidth or linewidths or lw float or sequence of floats norm Normalize offset_position {'screen', 'data'} offsets float or sequence of floats path_effects AbstractPathEffect picker None or bool or float or callable pickradius unknown rasterized bool or None sketch_params (scale: float, length: float, randomness: float) snap bool or None transform Transform url str urls List[str] or None visible bool zorder float