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Attribute browser: number ranges (Read 1842 times)
Talal
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Attribute browser: number ranges
Dec 10th, 2014, 7:04pm
 
First, permit me to say that the Attribute Browser of Tinderbox 6 is sheer brilliance. What an amazing analytical tool to further think about the information that one has entered into one's Tinderbox file.

But I do have a question. How does one delimit the number ranges that the Attribute Browser used to numerical information? For example, I have tracked the number of times that any given book is referenced in certain work. Some books have been mentioned 120 times, many only once, and most in-between. However, when I set up the Attribute Browser to present this information, it groups the number of mentions into rather strange groups: from 0-14.8; 14.8-29.6; 29.6-44.4; 44.4-59.2; etc in multiples of 14.8, apparently. For purposes of further summarising the number of counts (which the Attribute Browser allows for), I would much rather it just groups numbers as they come: all books with a count of 0, all books with a count of 1, etc. Is there any way to do this, or at least to affect this multiple of 14.4?

(Mark B: As a side note, it would be excellent if "snapshots" of particular configurations of the Attribute Browser could be saved and called up later.)

Many thanks.
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Mark Anderson
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Re: Attribute browser: number ranges
Reply #1 - Dec 11th, 2014, 4:29am
 
From experimentation, I think the AB view chunks Number type data values into 10 equal sections. The sections are based on a minimum of zero (or the lowest minus number if there are negative values) and the maximum is the maximum value found. For numbers over 9,999, when used in section headings, the format used is  '1e+04' for '10,000' and so on.

AB doesn't seem to update on value changes in the attribute being viewed, whether moving between buckets or altering the min/max value and thus bucket size. I find a simple refresh method is to switch to a new tab and back.

I think most AB use has focussed on String-based values, but if you've specific Number-based needs in AB view, it's worth contacting Eastgate explaining your needs in case it's a feature than can be incorporated.
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« Last Edit: Dec 11th, 2014, 4:31am by Mark Anderson »  

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Mark Anderson
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Mark Bernstein
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Re: Attribute browser: number ranges
Reply #2 - Dec 11th, 2014, 9:15am
 
At present, the attribute browser divides numeric ranges into ten bins of equal size; this is often simple and convenient.

For the also-common situation Talal describes, where a power law or poisson distribution concentrates lots of samples in one bin and spreads the others across a long tail, consider taking the log of the value and using log(X) in attribute browser.
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