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# Help! i have a question

[ Edited ]

Hi dear friends

theses days i was working on a data mining project for the first time and i faced with a problem

my data set was included of the result of 3 questions about 7 kind of sofa
for example:
which sofa do you prefer from quality aspect??
the answer could be from 1 to 7
and
which sofa do you prefer from price aspect??
and 3rd one was about color

so the result was a matrix of 100 people which were asked these questions with 3 column that were integer numbers from 1 to 7

now i wanted to apply association rule on this data set in rapid miner
and i expected to have such results : people have chosen first sofa from quality aspect usually have chosen third sofa from price aspect

but it was impossible because association rule module in rapid miner only works with Binominal data sets as you know ...
do you have any idea how can i solve this problem???

5 REPLIES
Moderator

## Re: Help! i have a question

This question should be moved to the Getting Started forum.

I would look at using the Numerical to Nominal operator.
Moderator

## Re: Help! i have a question

This question should be moved to the Getting Started forum.

I would look at using the Numerical to Nominal operator.
Contributor

## Re: Help! i have a question

Hi dear Thomas i added the question on the forum u said . about your suggestion i couldn't find the operator u introduced anyway it cant solve the problem because being nominal dose not concern with my problem if you want i can share data set with you which may helps understanding ... thanks for your help Rearguards
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Solution
Accepted by topic author fanoos
2 weeks ago

## Re: Help! i have a question

You'll have to convert your data set using the Nominal to Numerical operator, set at Dummy Coding. That will create new attribute columns but with 1's and 0's. From there you can use the Numerical to Binominal operator to convert them to true and falses.

Contributor

## Re: Help! i have a question

Hi dear Thomas

Thanks a million. It worked!

But I can’t understand the method and why I have used these operators. In fact I don’t know about Dummy Coding concept. Would you pls introduce me an article or sth which makes it clear for me??

Thanks again

Regards