Diffusion Trend

The Diffusion Trend plot compares the trends of all the statuses allowed by the diffusive model tested.

Each trend line describes the variation of the number of nodes for a given status iteration after iteration.

class ndlib.viz.bokeh.DiffusionTrend.DiffusionTrend(model, trends)
DiffusionTrend.__init__(model, iterations)
Parameters:
  • model – The model object
  • iterations – The computed simulation iterations
DiffusionTrend.plot(width, height)

Generates the plot

Parameters:
  • percentile – The percentile for the trend variance area
  • width – Image width. Default 500px.
  • height – Image height. Default 500px.
Returns:

a bokeh figure image

Below is shown an example of Diffusion Trend description and visualization for the SIR model.

import networkx as nx
from bokeh.io import show
import ndlib.models.ModelConfig as mc
import ndlib.models.epidemics.SIRModel as sir
from ndlib.viz.bokeh.DiffusionTrend import DiffusionTrend


# Network topology
g = nx.erdos_renyi_graph(1000, 0.1)

# Model selection
model = sir.SIRModel(g)

# Model Configuration
cfg = mc.Configuration()
cfg.add_model_parameter('beta', 0.001)
cfg.add_model_parameter('gamma', 0.01)
cfg.add_model_parameter("percentage_infected", 16 0.05)
model.set_initial_status(cfg)

# Simulation execution
iterations = model.iteration_bunch(200)
trends = model.build_trends(iterations)

# Visualization
viz = DiffusionTrend(model, trends)
p = viz.plot(width=400, height=400)
show(p)
SIR Diffusion Trend Example

SIR Diffusion Trend Example.