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Showing posts with the label Pytables
Matrix Multiplication Using Hdf5

Matrix Multiplication Using Hdf5

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

Argsort On A Pytables' Array

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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
Query Hdf5 In Pandas

Query Hdf5 In Pandas

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I have following data (18,619,211 rows) stored as a pandas dataframe object in hdf5 file: … Read more Query Hdf5 In Pandas
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?
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
Pytables Create_array Fails To Save Numpy Array

Pytables Create_array Fails To Save Numpy Array

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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
How Can The Shape Of A Pytables Table Column Be Defined By A Variable?

How Can The Shape Of A Pytables Table Column Be Defined By A Variable?

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I'm trying to create an IsDescription subclass, so that I can define the structure of a table I… Read more How Can The Shape Of A Pytables Table Column Be Defined By A Variable?