# Bounds¶

Title
Bounds Element
Dependencies
Matplotlib
Backends
Matplotlib
Bokeh
In [1]:
import holoviews as hv
hv.extension('matplotlib')


A Bounds element is an box shaped annotation that is specified as a tuple in (left, bottom, right, top) format:

In [2]:
penguins = hv.RGB.load_image('../assets/penguins.png')
bounds = hv.Bounds((-0.15, -0.4, 0.2, 0))
penguins * bounds.opts(color='orange', linewidth=6)

Out[2]:

It is useful for denoting a region of interest defined by some bounds (such as a slice) which is unlike the Box element which is useful for drawing a box at a specific location. Here we show the a slice of the RGB element (green channel only) outlined by the bounds. Note that the values in the Bounds tuple are the same ones as used in the slice:

In [3]:
penguins * penguins[-0.15:0.2, -0.4:0, 'G'] * hv.Bounds((-0.15, -0.4, 0.2, 0))

Out[3]:

For full documentation and the available style and plot options, use hv.help(hv.Bounds).