alper said:

alper

What's the visualization called where you take a timeline and plot bars for each occurrence to visualize frequency and distribution?

10 months, 3 weeks ago.

18 comments so far

  • adewale

    Do you mean a histogram: http://quarknet.fnal.gov/toolkits/ati/histograms.html

    10 months, 3 weeks ago by adewale

  • alper

    No, I'm pretty familiar with those. I'm whipping up something in Prototype.

    10 months, 3 weeks ago by alper

  • kaeru

    This might help to find the canonical name.

    10 months, 3 weeks ago by kaeru

  • Liekje

    Boxplot?

    10 months, 3 weeks ago by Liekje

  • alper

    @kaeru: Nice, but no cigar.

    @Liekje: A boxplot would come close if I wanted the data even further reduced and the distribution displayed on a single dimension.

    I just whipped this up: http://www.flickr.com/photos/alper/3197163008/ If it doesn't have a proper name, we should christen it.

    10 months, 3 weeks ago by alper

  • beep

    in that case I suggest the "Alper Barcode Chart" :-)

    10 months, 3 weeks ago by beep

  • tonzylstra

    spectral lines? ;)

    10 months, 3 weeks ago by tonzylstra

  • alper

    @beep It does look a lot like a barcode, but in a next iteration I want to take into account multiple hits on the same pixel, which should make it draw darker.

    @tonzylstra Nice direction, ‘temporal spectrum chart’ or something…

    10 months, 3 weeks ago by alper

  • adewale

    This reminds me of the output from spectral analysis.

    10 months, 3 weeks ago by adewale

  • adewale

    http://en.wikipedia.org/wiki/Emissionspectrum and http://en.wikipedia.org/wiki/File:Sodiumspectrum.jpg are examples of this.

    It looks like @tonzylstra was right. These are indeed spectral lines: http://en.wikipedia.org/wiki/Atomicspectralline

    I cheated and asked a passing physicist

    10 months, 3 weeks ago by adewale

  • alper

    @adewale That is the closest yet, but I think the fact that time is the horizontal axis here is a solid differentiator. I need to get the Visual Display of Quantitative data anyway, but I fear it won't be much help here because this is not a quantitative dataset.

    Most time series visualizations are also concerned with quantitative data, though this might be an interesting replot: http://www.math.yorku.ca/SCS/Gallery/images/LAoz.gif (by day of the week).

    10 months, 3 weeks ago by alper

  • effbot

    I'd call that a one-dimensional scatterplot (using a vertical bar as the symbol). It's not like it's the first time I've seen one of those, after all.

    10 months, 3 weeks ago by effbot

  • termie

    it's still just a histogram, time x (did occur), just munge the data to be 1's and 0's

    10 months, 3 weeks ago by termie

  • termie

    in R, where 0 is initial time and each second is 0.1, for 20 seconds: <pre> > b <- c(0.1, 0.4, 0.5, 0.6, 1.0, 1.7, 1.8, 1.9) > hist(b, breaks=20) </pre>

    http://term.ie/data/quick_hist.png

    10 months, 3 weeks ago by termie

  • termie

    hmm that got escaped funny it was:

    <pre> b = c(0.1, 0.4, 0.5, 0.6, 1.0, 1.7, 1.8, 1.9) hist(b, breaks=20) </pre>

    10 months, 3 weeks ago by termie

  • termie

    (you've obviously do some stuff to make the lines thinner, and blacker, and have much more data, and hide the the y axis)

    10 months, 3 weeks ago by termie

  • alper

    Thanks for the additions, I think I'd probably should re-acquaint myself with R (I used to have some proficiency in SPlus).

    10 months, 3 weeks ago by alper

  • adewale

    It's funny but ever since seeing this page: http://en.wikipedia.org/wiki/Baader-Meinhof_Phenomenon about the Baider-Meinhof phenomenon I've started seeing references to the R programming language everywhere.

    10 months, 3 weeks ago by adewale

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