R help - Mar 2012 - normalization of multi-value string variable

Hi All,

I need to normalize/scale string variable which represents interests of
customers (e.g., 'cycling, rollerblading, swimming' etc).

Does anybody know how to do this, I want then use it along with other numeric
variables for SVM classification.

Appreciate for any advice.

-Alex

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Thank you so much, Jessica,

The specific of my case is that I have a very detailed variable
'Interests' which may have several thousands of possible values. Usually
each customer has 3-10 different interests. For example:
customer_id|...|interests
10000001   |...| cycling, swimming, cooking
10000002   |...| cooking, singing, dancing

Total number of possible distinct values is several thousands. I m curious how
to use these interests in SVM (represent as a vector of real numbers with
several thousands of elements?).

If you have any ideas please let me know.


Thank you,
-Alex

________________________________
From: Jessica Streicher [j.streicher@micromata.de]
Sent: 27 March 2012 11:18
To: Alekseiy Beloshitskiy
Subject: Re: [R] normalization of multi-value string variable

Well, not sure what you mean with scaling and normalizing strings, but if you
want to represent the interests as numbers, you can do something like this:

n<-seq(1,length(unique(my_strings)))[factor(my_strings)]


Am 26.03.2012 um 18:50 schrieb Alekseiy Beloshitskiy:

Hi All,

I need to normalize/scale string variable which represents interests of
customers (e.g., 'cycling, rollerblading, swimming' etc).

Does anybody know how to do this, I want then use it along with other numeric
variables for SVM classification.

Appreciate for any advice.

-Alex

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