Visualiseer de graaf

Nu we even hebben nagedacht over hoe we ons netwerk hebben opgebouwd, gaan we de graaf opmeten en een eerste visualisatie maken. Voordat je de plot maakt, bereken je het aantal knopen en randen. Zo weet je of je het hele netwerk daadwerkelijk kunt plotten. Bovendien geeft de verhouding tussen knopen en randen je een gevoel voor hoe dicht of juist schaars je plot zal zijn. Terwijl je de plot maakt, kun je alvast bedenken hoe je verwacht dat de visual eruit zal zien op basis van deze statistieken.

Deze oefening maakt deel uit van de cursus

Casestudies: netwerkanalyse in R

Cursus bekijken

Oefeninstructies

Bereken het aantal knopen van de graaf retweet_graph met gorder().
Bereken het aantal randen van de graaf retweet_graph met gsize().
Bereken de dichtheid van de graaf retweet_graph met graph.density().
Plot het retweetnetwerk retweet_graph.

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

# Count the number of nodes in retweet_graph
___

# Count the number of edges in retweet_graph
___

# Calculate the graph density of retweet_graph
___

# Plot retweet_graph
plot(___)

Code bewerken en uitvoeren

Deze oefening maakt deel uit van de cursus

Casestudies: netwerkanalyse in R

SkillTag.level.beginnerSkillTag.label

4.8+

Begin de cursus gratis

In this chapter you'll explore a subset of an Amazon purchase graph. You'll build on what you've already learned, finding important products and discovering what drives purchases. You'll also examine how graphs can change through time by looking at the graph during different time periods.

Exercise 1: Exploring your data set Exercise 2: Finding Dyads and Triads Exercise 3: Clustering and Reciprocity Exercise 4: Important Products Exercise 5: What Makes an Important Product?Exercise 6: Exploring temporal structure Exercise 7: Metrics through time Exercise 8: Plotting Metrics Over Time

In this lesson you'll explore some Twitter data about R by looking at conversations using '#rstats'. First you'll look at the raw data and think about how you want to build your graph. There's a number of ways to do this, and we'll cover two ways: retweets and mentions. You'll build those graphs and then compare them on a number of metrics.

Exercise 1: Je retweet-grafiek maken Exercise 2: Visualiseer de graaf

Huidige oefening

Exercise 3: Visualiseer knopen op basis van graad Exercise 4: Wat is de verdeling van centraliteit?Exercise 5: Wie is belangrijk in het gesprek?Exercise 6: Belangrijke knopen plotten Exercise 7: Een mentions-grafiek maken Exercise 8: Vermeldings- vs. retweetgrafiek vergelijken Exercise 9: Assortativiteit en wederkerigheid Exercise 10: Uitvinden wie met wie praat Exercise 11: Gemeenschappen vinden Exercise 12: Community-algoritmes vergelijken Exercise 13: Gemeenschappen visualiseren

In this chapter you will analyze data from a Chicago bike sharing network. We will build on the concepts already covered in the introductory course, and add a few new ones to handle graphs with weighted edges. You will also start with data in a slightly more raw form and cover how to build your graph up from a data source you might find.

Exercise 1: Creating our graph from raw data Exercise 2: Making Graphs of Different User Types Exercise 3: Compare Graphs of Different User Types Exercise 4: Compare graph distance vs. geographic distance Exercise 5: Compare Subscriber vs. Non-Subscriber Distances Exercise 6: Most Traveled To and From Stations Exercise 7: Most Traveled To and From Stations with Weights Exercise 8: Visualize central vertices Exercise 9: Weighted Measures of Centrality Exercise 10: Connectivity Exercise 11: Find the minimum cut 1 Exercise 12: Find the minimum cut 2 Exercise 13: Unweighted Clustering Randomizations Exercise 14: Weighted Clustering Randomizations

So far everything we've done has been using plotting from igraph. It provides many powerful ways to plot your graph data. However many people prefer interacting with other plotting frameworks like ggplot2, or even interactive frameworks like d3.js. In this lesson you'll look at other plotting libraries that build on the ggplot2 framework. You'll also look at other non-"hairball" type methods like hive plots, as well as building interactive and animated plots.

Exercise 1: Other packages for plotting graphs!Exercise 2: ggnet Basics Exercise 3: ggnetwork Basics Exercise 4: More ggnet Plotting Options Exercise 5: More ggnetwork Plotting Options Exercise 6: Interactive visualizations Exercise 7: Interactive plots with ggiraph Exercise 8: Interactive javascript plots Exercise 9: Alternative visualizations Exercise 10: Alternative ways to visualize a graph: Hive plots Exercise 11: BioFabric as an HTML widget Exercise 12: Plotting graphs on a map