visbrain.objects.HypnogramObj

class visbrain.objects.HypnogramObj(name, data=None, time=None, datafile=None, art=-1, wake=0, n1=1, n2=2, n3=3, rem=4, art_visual=1, wake_visual=0, rem_visual=-1, n1_visual=-2, n2_visual=-3, n3_visual=-4, art_color='#8bbf56', wake_color='#56bf8b', rem_color='#bf5656', n1_color='#aabcce', n2_color='#405c79', n3_color='#0b1c2c', line_width=2.0, antialias=False, unicolor=False, transform=None, parent=None, verbose=None, **kw)

Hypnogram object.

Parameters

namestring

Name of the hypnogram object or path to a *.txt or *.csv file.

dataarray_like

Array of data of shape (n_pts,).

timearray_like | None

Array of time points of shape (n_pts,)

datafilestring | None

Path to the data file.

art, wake, rem, n1, n2, n3 :

Stage identification inside the data array.

art_visual, wake_visual, rem_visual, n1_visual, n2_visual, n3_visual :

Stage order when plotting.

art_color, wake_color, rem_color, n1_color, n2_color, n3_color :

Stage color.

line_widthfloat | 2.

Line with of the hypnogram.

antialiasbool | False

Use anti-aliasing line.

unicolorbool | False

Use a uni black color for the hypnogram.

transformVisPy.visuals.transforms | None

VisPy transformation to set to the parent node.

parentVisPy.parent | None

Hypnogram object parent.

verbosestring

Verbosity level.

kwdict | {}

Optional arguments are used to control the colorbar (See ColorbarObj).

Notes

List of supported shortcuts :

• s : save the figure

• <delete> : reset camera

Examples

>>> import numpy as np
>>> from visbrain.objects import HypnogramObj
>>> data = np.repeat(np.arange(6), 100) - 1.
>>> h_obj = HypnogramObj('hypno', data)
>>> h_obj.preview(axis=True)

Methods

__init__(name[, data, time, datafile, art, …])	Init.
animate([step, interval, iterations])	Animate the object.
copy()	Get a copy of the object.
describe_tree()	Tree description.
preview([bgcolor, axis, xyz, show, obj, …])	Previsualize the result.
record_animation(name[, n_pic, bgcolor])	Record an animated object and save as a *.gif file.
render()	Render the canvas.
screenshot(saveas[, print_size, dpi, unit, …])	Take a screeshot of the scene.
set_shortcuts_to_canvas(canvas)	Set shortcuts to a VisbrainCanvas.
set_stage(stage, idx_start, idx_end)	Set stage.
to_dict()	Return a dictionary of all colorbar args.
to_kwargs([addisminmax])	Return a dictionary for input arguments.
update()	Fonction to run when an update is needed.
update_from_dict(kwargs)	Update attributes from a dictionary.

animate(step=1.0, interval='auto', iterations=-1)

Animate the object.

Note that this method can only be used with 3D objects.

Parameters

stepfloat | 1.

Rotation step.

intervalfloat | ‘auto’

Time between events in seconds. The default is ‘auto’, which attempts to find the interval that matches the refresh rate of the current monitor. Currently this is simply 1/60.

iterationsint | -1

Number of iterations. Can be -1 for infinite.

cmap

Get the cmap value.

copy()

Get a copy of the object.

data_folder

Get the data_folder value.

line_width

Get the line_width value.

name

Get the name value.

parent

Get the parent value.

preview(bgcolor='black', axis=False, xyz=False, show=True, obj=None, size=(1200, 800), mpl=False, **kwargs)

Previsualize the result.

Parameters

bgcolorarray_like/string/tuple | ‘black’

Background color for the preview.

axisbool | False

Add x and y axis with ticks.

xyzbool | False

Add an (x, y, z) axis to the scene.

objVisbrainObj | None

Pass a Visbrain object if you want to use the camera of an other object.

sizetuple | (1200, 800)

Default size of the window.

mplbool | False

Use Matplotlib to display the object. This result in a non interactive figure.

kwargsdict | {}

Optional arguments are passed to the VisbrainCanvas class.

record_animation(name, n_pic=10, bgcolor=None)

Record an animated object and save as a *.gif file.

Note that this method :

• Can only be used with 3D objects.

• Requires the python package imageio

Parameters

namestring

Name of the gif file (e.g ‘myfile.gif’)

n_picint | 10

Number of pictures to use to render the gif.

bgcolorstring, tuple, list | None

Background color.

render()

Render the canvas.

Returns

imgarray_like

Array of shape (n_rows, n_columns, 4) where 4 describes the RGBA components.

screenshot(saveas, print_size=None, dpi=300.0, unit='centimeter', factor=None, region=None, autocrop=False, bgcolor=None, transparent=False, obj=None, line_width=1.0, **kwargs)

Take a screeshot of the scene.

By default, the rendered canvas will have the size of your screen. The screenshot() method provides two ways to increase to exported image resolution :

• Using print_size, unit and dpi inputs : specify the size of the image at a specific dpi level. For example, you might want to have an (10cm, 15cm) image at 300 dpi.

• Using the factor input : multiply the default image size by this factor. For example, if you have a (1920, 1080) monitor and if factor is 2, the exported image should have a shape of (3840, 2160) pixels.

Parameters

saveasstr

The name of the file to be saved. This file must contains a extension like .png, .tiff, .jpg…

print_sizetuple | None

The desired print size. This argument should be used in association with the dpi and unit inputs. print_size describe should be a tuple of two floats describing (width, height) of the exported image for a specific dpi level. The final image might not have the exact desired size but will try instead to find a compromize regarding to the proportion of width/height of the original image.

dpifloat | 300.

Dots per inch for printing the image.

unit{‘centimeter’, ‘millimeter’, ‘pixel’, ‘inch’}

Unit of the printed size.

factorfloat | None

If you don’t want to use the print_size input, factor simply multiply the resolution of your screen.

regiontuple | None

Select a specific region. Must be a tuple of four integers each one describing (x_start, y_start, width, height).

autocropbool | False

Automaticaly crop the figure in order to have the smallest space between the brain and the border of the picture.

bgcolorarray_like/string | None

The background color of the image.

transparentbool | False

Specify if the exported figure have to contains a transparent background.

objVisbrainObj | None

Pass a Visbrain object if you want to use the camera of an other object for the sceen rendering.

kwargsdict | {}

Optional arguments are passed to the VisbrainCanvas class.

set_stage(stage, idx_start, idx_end)

Set stage.

Parameters

stagestr, int

Stage to define. Should either be a string (e.g ‘art’, ‘rem’…) or an integer.

idx_startint

Index where the stage begin.

idx_endint

Index where the stage finish.

transform

Get the transform value.

unicolor

Get the unicolor value.

visible_obj

Get the visible_obj value.