Btw, the correct syntax for alias should be
`df.select($"image.data".as("features"))`.
On Tue, Feb 24, 2015 at 3:35 PM, Xiangrui Meng <men...@gmail.com> wrote:
> If you make `Image` a case class, then select("image.data") should work.
>
> On Tue, Feb 24, 2015 at 3:06 PM, Jaonary Rabarisoa <jaon...@gmail.com> wrote:
>> Hi all,
>>
>> I have a DataFrame that contains a user defined type. The type is an image
>> with the following attribute
>>
>> class Image(w: Int, h: Int, data: Vector)
>>
>> In my DataFrame, images are stored in column named "image" that corresponds
>> to the following case class
>>
>> case class LabeledImage(label: Int, image: Image)
>>
>> How can I select image.data attribute of my image object and view it as a
>> column of a DataFrame ?
>>
>> I'd like to do something like
>>
>> val featureDF = imagesDF.select("image.data").as("features")
>>
>>
>> Cheers,
>>
>> Jao
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