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El Potaeto 2015-03-01 21:35:36 +01:00
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R-package/vignettes/discoverYourData.Rmd
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@ -46,12 +46,14 @@ A *categorical* variable is one which have a fixed number of different values. F
> >
> Type `?factor` in the console for more information. > Type `?factor` in the console for more information.
To answer the question above we will convert *categorical* variables to `numeric` one.
Conversion from categorical to numeric variables Conversion from categorical to numeric variables
------------------------------------------------ ------------------------------------------------
### Looking at the raw data ### Looking at the raw data
In this demo we will see how to transform a *dense* dataframe (*dense* = few zero in the matrix) with *categorical* variables to a very *sparse* matrix (*sparse* = lots of zero in the matrix) of `numeric` features. In this Vignette we will see how to transform a *dense* dataframe (*dense* = few zero in the matrix) with *categorical* variables to a very *sparse* matrix (*sparse* = lots of zero in the matrix) of `numeric` features.
The method we are going to see is usually called [one hot encoding](http://en.wikipedia.org/wiki/One-hot). The method we are going to see is usually called [one hot encoding](http://en.wikipedia.org/wiki/One-hot).