Data sonification with R: the sound of Twitter data

Posted by on May 29, 2013 in R, r-project, Social Networks | 2 comments

tweet_waveWhat does a tweet sound like? Not the kind that flies around in the air, but the kind that zips to and from our mobile devices. I’m intensely interested in finding ways to make sense of data. Sonification of data – representing data with sound – offers one way to do that. This post steps through R code to take the text of tweets and turn them into short chirping sounds. It also uses different tones for different users so that each user has a “voice”. In other words, this post shows how to use R to make Twitter data sing.

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Big Data Viz Rap: Visualize, Analyze and Realize

Posted by on Apr 12, 2013 in Data Visualization | 1 comment

DataVizRap_800x800Robert Mason, Shawn Walker and Jeff Hemsley participated in the University of Washington, Information School’s iAffiliates Day, “an event that fosters new partnerships and showcases the innovative work being done at the iSchool. The event is an unconference format with the theme of discovering information partnerships”. Participants give a two minute lightning talk intended to “enlighten, inspire, educate, or otherwise engage the audience” about a given topic. Jeff chose to “otherwise engage” the audience with a two minute rap about data visualization. Read more for the full text.

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Social media — woo-oo!

Posted by on Mar 28, 2013 in Uncategorized | 0 comments

DuckTales_(Main_title)One difficulty with which social media researchers grapple is the separation of “noise” from “signal.”  Noise is traditionally those data that don’t contain relevance to a given query – in this case, tweets about Occupy Wall Street, or more specifically, Occupy Oakland.  Occupy Oakland took on the hashtag “#oo” fairly early into the occupations, which has served to create a headache for those of us at the SoMe Lab.  Continuing my exploration into topic modeling and taking inspiration from digital humanists and practices of ‘pataphysics, I decided to explore the noise to see what it contains.  After all, one person’s noise is another’s signal!  Click through to read about #oo, emotions, tokenization, and linguistic difference and to see our first topic modeling visualization — and figure out what Ducktales has to do with #ows!

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Black Boxes, Systems, and Social Media Studies

Posted by on Mar 16, 2013 in Data Visualization, Information Visualization, Methods, Modeling, Research | 0 comments

black_boxBlack box:  it’s generally what we call the flight data recorder that we all know about…but did you know it’s really bright orange in color (so it can be found easily)?

In the case of social media researchers, the situation today is that much of our research is like the flight data recorder: we collect, store, and report data and analyses, but we follow the dictum on the outside and “do not open” the box.

We’re discovering this is a mistake.

By keeping the black box closed, we can create a misleading impression when we report our research results.  We inhibit others from replicating our findings or testing the limits of our results if we do not fully disclose the details of our processes.  We may also miss the chance to ask research questions if we ignore the opportunities to explore the data by testing the sensitivity of our findings to changes in our research procedures.   There are some things we can do from the outside—approaches borrowed from systems theory and systems analysis approaches—but all of us will improve our research as we make our methods more visible…as we open up the black box.

Let’s look at some examples.  In conducting research with social media data, it’s helpful to think about the sequential ELT steps in data warehousing systems.  In following these steps, we:  Extract (data from streams or sources), Transform (the data by parsing it and including metadata that enable us to address our research questions), and Load (the transformed data into an accessible dataset).  And these are just the first steps—before we begin our analysis.  At each step, small variations in the procedures or rules we use can result in significant shifts to our later findings, to the questions we are capable of answering, and even to questions we can imagine asking.  For example, suppose we want to do an analysis of Twitter messages.  In extracting Twitter data, do we use the Twitter API?  If so, do we collect the data in real time (streaming API) or do we employ queries (search API), getting some retrospective tweets?  If we opt not to use the API, we could use one of several developer-based or commercial services (e.g., Gnip) to get our data, but can we afford it?  Each may have advantages, but the samples that result from each may be different.   If the samples differ, can we be confident in our research results in each case?

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Walking the data with Certeau and topic modeling

Posted by on Feb 20, 2013 in Uncategorized | 3 comments

binary_dataIn The Practice of Everyday Life, Certeau describes the process of “walking the city,” noting that the ways in which people experience the city are qualitatively different than what urban planners and sociologists are capable of measuring.  I argue that this process of “walking a space” can be applied to the spaces of social media as well, particularly in regard to the spaces of discourse created by emergent hashtags.  I”m also playing with MALLET, a tool for Latent Dirichlet Allocation (LDA) topic modeling for “big data” texts.  I”m just getting started in the process of learning some of the computational tools needed for performing these “distant readings,” but already I”ve discovered ways in which “walking the data” might inform our practice as researchers.  Click through to read an explanation of what I mean, an example or two of MALLET topic output, and how my own experience of “walking the data” as a lived event informs the analysis.

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46th HICSS Workshop

Posted by on Feb 8, 2013 in Ethics, Methods, Research, Workshop | 0 comments

 

Workshop--Hawaii

Workshop–Hawaii

Hawaii.

The name itself evokes images of tropical sun, warm waters, surfing, and relaxation.

So what are the people in this image doing inside, intent on looking at computer screens? Instead of savoring the sunshine and walking on the sand, here they sit.  Inside.  Hunched over laptops.  Interpreting a series of instructions to make sense of social media data.  Listening to the SoMe Lab team explain what they are seeing.  They are not behaving as you imagine Hawaiian visitors would behave.

These dedicated researchers are taking part in the workshop organized by the SoMe Lab team at HICSS46, held this past January in Wailea on Maui. As a part of the workshop, they were hearing from the SoMe team about lessons the team has learned in the past fifteen months.

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Visualizing threaded conversation volume and intensity

Posted by on Jan 24, 2013 in Data Visualization, Information Visualization, R, r-project | 5 comments

click for larger view

click for larger view

As a researcher interested in information flows in digital environments I’m often interested in finding patterns in social trace data. For this discussion we can think of digital social trace data as the text that people post into threaded topics on forums, like on Reddit or a Wiki Talk page on Wikipedia. One way to find patterns in this kind of data is to make visualizations based on different quantifiable dimensions in the data, for example, total topic volume per day, volume per thread per day, and, possibly, the intensity of the discussion (as interpreted by qualitative researchers). In the remainder of this post I will note what we can learn from our visualization as well as its limitations and then post the R code I used to make the plot.

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