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"MarketBasket Analysis Pivot-Problem"

SunnyLotusFlowe

Hi all,

i have a Problem with my workflow:

I have a Data set like

CardID | Product
10150 softdrink
10236 beer
...

Everytime i wanna do pivoting, the Product-Column disapears.
The Pivoting has the following configuration:

group attribute: cardid
index attribute: Product

I dont understand why the Product disapears ....

greetings

SunnyLotusFlower

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Pivot + De-Pivot

Accepted answers

All comments

SunnyLotusFlowe

Does noone got an idea about that problem? is it a bug or sm like that?

greetings

Lotus

IngoRM

No, not a bug but you would need an additional column containing the values which should be placed into the resulting table. Try:

CardID | Product | Amount
10150 softdrink 1
10236 beer 1
...

and you will be fine.

Cheers,
Ingo

SunnyLotusFlowe

hm didnt work. i have the following settings for the Pivoting-Operator:

Group Attribute cardid
index attribute: product

and i have created a new column amount

greetings

Lotus
____________________
Update
i noticed that the Pivoting Operator had removed my Product column and doesnt show resulting columns

IngoRM

There is a working example of how to use the Pivoting operator on myexperiment.org. Just install the Community Extension and download the process named "Pivoting". There you will see how this process works.

Cheers,
Ingo

SunnyLotusFlowe

i got the workflow. i can replicate the problem, if i remove the add noise operator.

but why is this 'add noise'-operator there ? that is confusing...

greetings

Lotus

IngoRM

Hi,

you would need an additional column containing the values which should be placed into the resulting table.

why is this 'add noise'-operator there ? that is confusing...

Make an educated guess... what could this noise attribute be used for?

Right: the values which should be placed in the resulting table!

Cheers,
Ingo

SunnyLotusFlowe

hm i found something interesting i think at least.

if i construct a column count, with the instances all = 1 ( all examples have the SAME !!! entry ) then the pivot-operator doesnt perform his rotating .

Why i cant do that ??? did i forget a important detail ??

greetings Lotus

SunnyLotusFlowe

or is this a bug ?

greetings

Lotus

IngoRM

Hi,

thanks for pointing out this issue. This could indeed be a bug. I have filed a bug report at

http://bugs.rapid-i.com/show_bug.cgi?id=380

Cheers,
Ingo

SunnyLotusFlowe

the curious problem is that, this 'feature lead to my problems i described all the time.

i think i have another bug for u:

can i send u a data set?

because not all column are displayed when pivoting...

IngoRM

Hi,

can i send u a data set?

no, but you could attach it to the bug or to one of our developers.

Cheers,
Ingo

tobias15556

Bug seems to be same as this one:
http://bugs.rapid-i.com/show_bug.cgi?id=245

SunnyLotusFlowe

with my data set i constructed the follow Workflow:

Read Csv -> Generate Empty -> Numerical to polynominal ->

replace Missing Values -> set data -> pivoting -> set data (2) -> replace Missing

______________

ok to bypass that problem i described before i use the operator 'set data'.
i change the first example to 2 the rest of the counts got a '1' . and then i rotate
with the pivoting. if i look in the second Set Data Operator there must be more than 3 column
which i can choose.

in other words: the pivoting operator got 15 regular attributes and i in the second set data op i
only can choose between 3. there must be 15!

greetings

Lotus

_________________

this i a part of the data. it should be placed into a csv-data- and then the workflow i wrote above should be build to replicate the 'error'.

cardid,Product
10150,softdrink
10150,fruitveg
10236,frozenmeal
10236,beer
10360,fish
10360,cannedveg
10360,beer
10360,frozenmeal
10451,confectionery
10451,frozenmeal
10451,beer
10451,cannedveg
10609,fish
10609,fruitveg
10614,softdrink
10645,fruitveg
10645,frozenmeal
10645,beer
10645,cannedveg
10645,freshmeat
10717,fish
10717,fruitveg
10717,freshmeat
10872,fish
10872,frozenmeal
10872,cannedveg
10872,beer
10902,fruitveg
10902,wine
10915,fruitveg
10915,cannedmeat
10915,fish
10915,dairy