in reply to Re: Data visualisation.
in thread Data visualisation.

coded up a distance-matrix to coordinates program

Thanks. That's very helpful.

However, the data doesn't seem to map into a planar representation.

I assume you mean the OP data in the TSP thread. This data has nothing to do with that data. (Though it was the trigger for my current interest.)

My first postulate: the maximum size of the plane required is: xMax = yMax = 1.23 * sqrt( max_distance2 / 2 ).

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

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Re^3: Data visualisation.
by roboticus (Chancellor) on Jan 02, 2014 at 15:23 UTC

    BrowserUk:

    I'm glad you found it useful. The problem was interesting, so I kept playing around with it.

    And yes, I was referring to the OP data in the TSP thread--I haven't had a chance to check out your distance data yet. In my initial replies, I read my browser tabs out of order and rather than noticing that this was a new thread, I thought I was working in that thread, so I probably made a few mistakes in that regard.

    Another possibility I've been thinking about is to add a Z coordinate to see if the data could be made consistent that way. (Again referring to OP TSP data.) But if the data represents miles travelled (i.e. along the road, rather than as the crow flies), adding a single degree of freedom is probably insufficient.

    ...roboticus

    When your only tool is a hammer, all problems look like your thumb.

[reply]
      (Again referring to OP TSP data.) But if the data represents miles travelled (i.e. along the road, rather than as the crow flies), adding a single degree of freedom is probably insufficient.

      Indeed. Road routes are rarely straight lines. That's why I obtained a different* set of data for experimenting with.

      (*As well as smaller (quicker to process) and with a known solution.)

      With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.
[reply]

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