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Showing posts with the label Pytables
What Is The Most Memory Efficient Way To Combine Read_sorted And Expr In Pytables?

What Is The Most Memory Efficient Way To Combine Read_sorted And Expr In Pytables?

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I am looking for the most memory efficient way to combine reading a Pytables table (columns: x,y,z)… Read more What Is The Most Memory Efficient Way To Combine Read_sorted And Expr In Pytables?
Pandas Pytable: How To Specify Min_itemsize Of The Elements Of A Multiindex

Pandas Pytable: How To Specify Min_itemsize Of The Elements Of A Multiindex

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I am storing a pandas dataframe as a pytable which contains a MultiIndex. The first level of the M… Read more Pandas Pytable: How To Specify Min_itemsize Of The Elements Of A Multiindex
Opening A Corrupted Pytables Hdf5 File

Opening A Corrupted Pytables Hdf5 File

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I am hoping for some help in opening a corrupted HDF5 file. I am accessing PyTables via Pandas, but… Read more Opening A Corrupted Pytables Hdf5 File
I Want To Convert Very Large Csv Data To Hdf5 In Python

I Want To Convert Very Large Csv Data To Hdf5 In Python

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I have a very large csv data. It looks like this. [Date, Firm name, value 1, value 2, ..., value 60… Read more I Want To Convert Very Large Csv Data To Hdf5 In Python
Pytables Duplicates 2.5 Giga Rows

Pytables Duplicates 2.5 Giga Rows

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I currently have a .h5 file, with a table in it consisting of three columns: a text columns of 64 c… Read more Pytables Duplicates 2.5 Giga Rows
Hdfstore Start Stop Not Working

Hdfstore Start Stop Not Working

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Is it clear what I am doing wrong? I'm experimenting with pandas HDFStore.select start and stop… Read more Hdfstore Start Stop Not Working
Store Pandas Dataframe In Pytables Table Without Storing Index

Store Pandas Dataframe In Pytables Table Without Storing Index

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In many DataFrame.to_foo functions I can specify that I don't want to write the index >>&… Read more Store Pandas Dataframe In Pytables Table Without Storing Index
Using Pytables, Which Is More Efficient: Scipy.sparse Or Numpy Dense Matrix?

Using Pytables, Which Is More Efficient: Scipy.sparse Or Numpy Dense Matrix?

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When using pytables, there's no support (as far as I can tell) for the scipy.sparse matrix form… Read more Using Pytables, Which Is More Efficient: Scipy.sparse Or Numpy Dense Matrix?