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Showing posts with the label Pytables

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

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

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

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

Pytables Duplicates 2.5 Giga Rows

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

Matrix Multiplication Using Hdf5

I'm trying to multiplicate 2 big matrices with memory limit using hdf5 (pytables) but function … Read more Matrix Multiplication Using Hdf5

Store Pandas Dataframe In Pytables Table Without Storing Index

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

Argsort On A Pytables' Array

I have a problem with NumPy's argsort. It creates an int64 array of the length of the input arr… Read more Argsort On A Pytables' Array

Pytables 2.3.1 With Python 2.5 On Windows: Error - Could Not Find A Local Hdf5 Installation

I'm trying to install PyTables 2.3.1 on Windows XP with Python 2.5. I'm getting the followi… Read more Pytables 2.3.1 With Python 2.5 On Windows: Error - Could Not Find A Local Hdf5 Installation

Pytables Create_array Fails To Save Numpy Array

Why does the snipped below give: 'TypeError: Array objects cannot currently deal with void, uni… Read more Pytables Create_array Fails To Save Numpy Array

Indexing And Data Columns In Pandas/pytables

http://pandas.pydata.org/pandas-docs/stable/io.html#indexing I'm really confused about this con… Read more Indexing And Data Columns In Pandas/pytables

Concatenate Two Big Pandas.HDFStore HDF5 Files

This question is somehow related to 'Concatenate a large number of HDF5 files'. I have seve… Read more Concatenate Two Big Pandas.HDFStore HDF5 Files

HDFStore Start Stop Not Working

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