Visualization

The visualization module provides a variety of functions to visualize initial, intermediate and final datasets within trackintel.

Positionfixes

trackintel.visualization.positionfixes.plot_positionfixes(positionfixes, out_filename=None, plot_osm=False, axis=None)

Plots positionfixes (optionally to a file).

If you specify plot_osm=True this will use osmnx to plot streets below the positionfixes. Depending on the extent of your data, this might take a long time. The data gets transformed to wgs84 for the plotting.

Parameters:

• positionfixes (GeoDataFrame (as trackintel positionfixes)) – The positionfixes to plot.

• out_filename (str, optional) – The file to plot to, if this is not set, the plot will simply be shown.

• plot_osm (bool, default False) – If this is set to True, it will download an OSM street network and plot below the staypoints.

• axis (matplotlib.pyplot.Artist, optional) – axis on which to draw the plot

Examples

>>> pfs.as_positionfixes.plot('output.png', plot_osm=True)

Staypoints

trackintel.visualization.staypoints.plot_staypoints(staypoints, out_filename=None, radius=100, positionfixes=None, plot_osm=False, axis=None)

Plot staypoints (optionally to a file).

You can specify the radius with which each staypoint should be drawn, as well as if underlying positionfixes and OSM streets should be drawn. The data gets transformed to wgs84 for the plotting.

Parameters:

• staypoints (GeoDataFrame (as trackintel staypoints)) – The staypoints to plot.

• out_filename (str, optional) – The file to plot to, if this is not set, the plot will simply be shown.

• radius (float, default 100 (meter)) – The radius in meter with which circles around staypoints should be drawn.

• positionfixes (GeoDataFrame (as trackintel positionfixes), optional) – If available, some positionfixes that can additionally be plotted.

• plot_osm (bool, default False) – If this is set to True, it will download an OSM street network and plot below the staypoints.

• axis (matplotlib.pyplot.Artist, optional) – axis on which to draw the plot

Examples

>>> sp.as_staypoints.plot('output.png', radius=100, positionfixes=pfs, plot_osm=True)

Triplegs

trackintel.visualization.triplegs.plot_triplegs(triplegs, out_filename=None, positionfixes=None, staypoints=None, staypoints_radius=100, plot_osm=False, axis=None)

Plot triplegs (optionally to a file).

You can specify several other datasets to be plotted beneath the triplegs, as well as if the OSM streets should be drawn. The data gets transformed to wgs84 for the plotting.

Parameters:

• triplegs (GeoDataFrame (as trackintel triplegs)) – The triplegs to plot.

• out_filename (str, optional) – The file to plot to, if this is not set, the plot will simply be shown.

• positionfixes (GeoDataFrame (as trackintel positionfixes), optional) – If available, some positionfixes that can additionally be plotted.

• staypoints (GeoDataFrame (as trackintel staypoints), optional) – If available, some staypoints that can additionally be plotted.

• staypoints_radius (float, default 100 (meter)) – The radius in meter with which circles around staypoints should be drawn.

• plot_osm (bool, default False) – If this is set to True, it will download an OSM street network and plot below the triplegs.

• axis (matplotlib.pyplot.Artist, optional) – axis on which to draw the plot

Example

>>> tpls.as_triplegs.plot('output.png', positionfixes=pfs, staypoints=sp, plot_osm=True)

Locations

trackintel.visualization.locations.plot_locations(locations, out_filename=None, radius=150, positionfixes=None, staypoints=None, staypoints_radius=100, plot_osm=False, axis=None)

Plot locations (optionally to a file).

Optionally, you can specify several other datasets to be plotted beneath the locations.

Parameters:

• locations (GeoDataFrame (as trackintel locations)) – The locations to plot.

• out_filename (str, optional) – The file to plot to, if this is not set, the plot will simply be shown.

• radius (float, default 150 (meter)) – The radius in meter with which circles around locations should be drawn.

• positionfixes (GeoDataFrame (as trackintel positionfixes), optional) – If available, some positionfixes that can additionally be plotted.

• staypoints (GeoDataFrame (as trackintel staypoints), optional) – If available, some staypoints that can additionally be plotted.

• staypoints_radius (float, default 100 (meter)) – The radius in meter with which circles around staypoints should be drawn.

• plot_osm (bool, default False) – If this is set to True, it will download an OSM street network and plot below the staypoints.

• axis (matplotlib.pyplot.Artist, optional) – axis on which to draw the plot

Examples

>>> locs.as_locations.plot('output.png', radius=200, positionfixes=pfs, staypoints=sp, plot_osm=True)

Modal split

trackintel.visualization.modal_split.plot_modal_split(df_modal_split_in, out_path=None, date_fmt_x_axis='%W', fig=None, axis=None, title=None, x_label=None, y_label=None, x_pad=10, y_pad=10, title_pad=1.02, skip_xticks=0, n_col_legend=5, borderaxespad=0.5, bar_kws=None)

Plot modal split as returned by trackintel.analysis.modal_split.calculate_modal_split

Parameters:

• df_modal_split (DataFrame) – DataFrame with modal split information. Format is

• out_path (str, optional) – Path to store the figure

• date_fmt_x_axis (str, default: '%W') – strftime() date format code that is used for the x-axis

• title (str, optional) –

• x_label (str, optional) –

• y_label (str, optional) –

• fig (matplotlib.figure) – Only used if axis is provided as well.

• axis (matplotlib axes) –

• x_pad (float, default: 10) – Used to set ax.xaxis.labelpad

• y_pad (float, default: 10) – Used to set ax.yaxis.labelpad

• title_pad (float, default: 1.02) – Passed on to matplotlib.pyplot.title

• skip_xticks (int, default: 1) – Every nth x-tick label is kept.

• n_col_legend (int) – Passed on as ncol to matplotlib.pyplot.legend()

• borderaxespad (float) – The pad between the axes and legend border, in font-size units. Passed on to matplotlib.pyplot.legend()

• bar_kws (dict) – Parameters that control the bar-plot visualization, passed to DataFrame.plot.bar()

Returns:

• fig (Matplotlib figure handle)

• ax (Matplotlib axis handle)

Examples

>>> modal_split = calculate_modal_split(triplegs, metric='count', freq='D', per_user=False)
>>> plot_modal_split(modal_split, out_path=tmp_file, date_fmt_x_axis='%d',
>>>                  y_label='Percentage of daily count', x_label='days')