TabularTextDataStore wont store more than 20000 rows

2 vues (au cours des 30 derniers jours)
SkarletSam le 21 Oct 2020
Commenté : Walter Roberson le 21 Oct 2020
Im trying to import a large csv file (60,000 x 171). tabularTextDataStore is only storing up to 20,000 rows. Is there a more efficient way to import all of the data?

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Kevin Gurney
Kevin Gurney le 21 Oct 2020
The amount of data returned on each call to the read method of a TabularTextDatastore is controlled by the value of the ReadSize property.
If you want to read more than 20,000 rows on each call to read (20,000 is the default value), then you can adjust the value of ReadSize like so:
trainSet = tabularTextDatastore("data\trainingSet.csv");
trainSet.ReadSize = 60000; % You can adjust this value to your liking.
trainSet.TreatAsMissing = 'na';
trainSetR = read(trainSet)
  2 commentaires
SkarletSam le 21 Oct 2020
It seems like TabularTextDatastore's read size has a max value of 45140
Walter Roberson
Walter Roberson le 21 Oct 2020
There seems to be an internal BUFFER_UPPERLIMIT property that is set to 32 megabytes, with 64 megabytes used for HADOOP . I do not see any method to set that property.

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