Sunday, June 12, 2016

#TweakThursday 3: Histogram vs Jitters

The recent Tableau Viz of the Day on spelling bee by Harley Ellenberger is such a delightful masterpiece. It is very sophisticated with carefully selected color palette. I checked every word on it and learnt a few new ones!
Again I found something to tweak. Here is the result:
1.Most gridlines are ditched.
- In the bar chart, the bars of different years are already distinguished by colors. The vertical gridlines don't add any more structure to it at all.
- In the word table, there is no dimension in rows. So, we don't need the horizontal gridlines neither.

2.The jitters chart is replaced by a histogram.
- The jitters give us some vague sense of density. But histogram can give us an exact number per bin. Here the bin is the word difficulty index.
- To create the histogram, we need to turn the difficulty index into a dimension. It is made continuous so that we can add a box plot. Please referred to an early article for some details.
- The box plot is made transparent to be the least intrusive.

Below are pictures on creating the histogram via Index().
3.Have the word list sorted
The author did try to sort the word list by sorting the [Winning word] dimension. Actually we need to sort the [index] in the advanced table calculation settings.
That's about it.

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