Problem with the ADVANCED DATA MINING WITH WEKA course

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Problem with the ADVANCED DATA MINING WITH WEKA course

Anatoliy
Hello everyone
I got a problem with the topic (ADVANCED DATA MINING WITH WEKA course at
Futurelearn)
"1.3 ARE YOU READY FOR THIS? QUIZ. (#4)"

Arff file after "weka.filters.unsupervised.instance.RemoveWithValues -S 0.0
-C last -L 1"

{40 1,131 neg}
{1 1,70 1,131 neg}
{125 1,131 neg}
{131 neg}
{55 1,131 neg}
{131 neg}
{131 neg}
{40 1.63 1.81 1.131 neg}
{74 1.85 1.101 1.129 1.131 neg}

Arff file after "weka.filters.unsupervised.instance.RemoveWithValues -S 0.0
-C last -L 2"
{60 1.79 1}
{1 1.23 1}
{44 1}
{22 1.58 1.93 1}
{45 1.78 1}
{30 1}
{78 1.84 1}
{41 1.87 1}
{34 1.90 1}
{13 1.38 1}
{83 1}
{30 1.53 1}
{52 1.79 1}
{41 1.46 1.57 1.117 1}

  has the value "pos" changed to "1"?

thanks in advance



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Re: Problem with the ADVANCED DATA MINING WITH WEKA course

Eibe Frank-3
In your data, the last attribute appears to be a nominal one with values {pos, neg} or something like that. Internally, in WEKA, each nominal value will be represented by its index (i.e., position in the list of values given in the definition of the attribute, with a starting position of 0). That means "pos" will be represented by value 0, and "neg" will be represented by value 1. Now, your data is in sparse ARFF format, in which values that are 0 are not explicitly stored. In the second bit of output, based on sparse ARFF format, you have filtered out all the "neg" cases, and the "pos" values are not explicitly shown...

Cheers,
Eibe

On Tue, Dec 3, 2019 at 1:12 AM Anatoliy <[hidden email]> wrote:
Hello everyone
I got a problem with the topic (ADVANCED DATA MINING WITH WEKA course at
Futurelearn)
"1.3 ARE YOU READY FOR THIS? QUIZ. (#4)"

Arff file after "weka.filters.unsupervised.instance.RemoveWithValues -S 0.0
-C last -L 1"

{40 1,131 neg}
{1 1,70 1,131 neg}
{125 1,131 neg}
{131 neg}
{55 1,131 neg}
{131 neg}
{131 neg}
{40 1.63 1.81 1.131 neg}
{74 1.85 1.101 1.129 1.131 neg}

Arff file after "weka.filters.unsupervised.instance.RemoveWithValues -S 0.0
-C last -L 2"
{60 1.79 1}
{1 1.23 1}
{44 1}
{22 1.58 1.93 1}
{45 1.78 1}
{30 1}
{78 1.84 1}
{41 1.87 1}
{34 1.90 1}
{13 1.38 1}
{83 1}
{30 1.53 1}
{52 1.79 1}
{41 1.46 1.57 1.117 1}

  has the value "pos" changed to "1"?

thanks in advance



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Re: Problem with the ADVANCED DATA MINING WITH WEKA course

Anatoliy
Hi Eibe

hmm ... a little tricky, but I almost got it :).
Thanks

regards
Anatoliy



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