Table of Contents

Note

This is the documentation for the current state of the development branch of Qiskit Experiments. The documentation or APIs here can change prior to being released.

BaseDrawer.image

abstract BaseDrawer.image(data, extent=None, name=None, label=None, cmap=None, cmap_use_series_colors=False, colorbar=False, **options)[source]

Draw an image of numerical values, series names, or RGB/A values.

Parameters:

  • data (ndarray) – The two-/three-dimensional data defining an image. If data.dims==2, then the pixel colors are determined by cmap and cmap_use_series_colors. If data.dims==3, then it is assumed that data contains either RGB or RGBA data; which requires the third dimension to have length 3 or 4 respectively. For RGB/A data, the elements of data must be floats or integers in the range 0-1 and 0-255 respectively. If the data is two-dimensional, there is no limit on the range of the values if they are numerical. If cmap_use_series_colors=True, then data contains series names; which can be strings or numerical values, as long as they are appropriate series names.

  • extent (Optional[Tuple[float, float, float, float]]) – An optional tuple (x_min, x_max, y_min, y_max) which defines a rectangular region within which the values inside data should be plotted. The units of extent are the same as those of the X and Y axes for the axis. If None, the extent of the image is taken as (0, data.shape[0], 0, data.shape[1]). Default is None.

  • name (Union[str, int, float, None]) – Name of this image. Used to lookup canvas and label in series_params.

  • label (Optional[str]) – An optional label for the colorbar, if colorbar=True.

  • cmap (Union[str, Any, None]) – Optional colormap for assigning colors to the image values, if data is not an RGB/A image. cmap must be a string or object instance which is recognized by the drawer. Defaults to None.

  • cmap_use_series_colors (bool) – Whether to assign colors to the image based on series colors, where the values inside data are series names. If cmap_use_series_colors=True,``cmap`` is ignored. This only works for two-dimensional images as three-dimensional data contains explicit colors as RGB/A values. If len(data.shape)=3, cmap_use_series_colours is ignored. Defaults to False.

  • colorbar (bool) – Whether to add a bar showing the color-value mapping for the image. Defaults to False.

  • options – Valid options for the drawer backend API.