[GitHub] thomelane commented on issue #8497: how to use mxnet mx.io.extract() in cnn model

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thomelane commented on issue #8497: how to use mxnet mx.io.extract()  in cnn model
URL: https://github.com/apache/incubator-mxnet/issues/8497#issuecomment-413969902
 
 
   @janejane11 I realise this was an issue for you quite a while ago, but it looks to me like you should indeed be passing arguments to `mx.io.extract`. Checking the docs found [here](https://s3.amazonaws.com/mxnet-prod/docs/R/mxnet-r-reference-manual.pdf) you need to pass the data_iter and the field you're interested in extracting: `mx.io.extract(iter, field)`. But I think `ImageRecordIter` extracts the label for you, so you wouldn't need to extract this manually. And then you could pass `confusionMatrix(pred.label, test.label)` or similar.

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