[SOLVED] Type 'text' no longer available when importing data

Hi,

If you want nominal as a result you can just stick with polynominal. Polynominal simply describes a string attribute with a nominal mapping and possibly n different strings where n = number of examples.
There should be nothing that requires "nominal" input but denies polynominal.

Cheers,
Marco

Hi Marco,
actually, I am using the data set as input for a linear regression model, but the linear regression model does not accept polynominal inputs. So, I have to convert any text/polynominal attributes to nominal.
Thanks

Hi Juan,

linear regression is only excepting numerical input. So you need to transform polynominal inputs into numericals (integer, reals).

~Martin

Right. That's the problem. The process to import my csv file only allows me to define this attribute as polynominal. But there's no 'polynominal to numerical' operator. I could use a chain of 'polynominal to nominal' followed by 'nominal to numerical', but there's no  'polynominal to nominal'  operator either.

With RapidMiner 6 I had the option to import my csv using attribute type 'text'. Then I could chain 'text to nominal' followed by 'nominal to numerical'.

So, is there an option to transform a polynominal attribute into numerical or nominal with RapidMiner 7?

Thanks

Hi,

the  'nominal to numerical'  Operator is called "Parse Numbers", that should do the trick.

Best,
David

Sorry, but that's not my problem. My problem is to convert a polynomial attribute into either nominal or numerical.

Hi,

A polynominal attribute is always nominal. It is "nominal with many classes". Same as all reals are numericals.

To convert (Poly)nominals to numeric, you can use Nominal to Numerical.

Best,
Martin

Hi Martin,

it works beautifully!!!!!

Thanks so much for the great tip, much appreciated

hi all, i am also facing the same problem. i want a attribute as an text.kindly help me.
Regards:
Sukh

Sukh,

This may sound silly, but have you tired the Nominal to Text operator?