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Showing posts with the label Hdf5

Adding Data To Existing H5py File Along New Axis Using H5py

I have some sample code that generates a 3d Numpy array -- I am then saving this data into a h5py f… Read more Adding Data To Existing H5py File Along New Axis Using H5py

Is It Possible To Directly Rename Pandas Dataframe's Columns Stored In Hdf5 File?

I have a very large pandas dataframe stored in hdf5 file, and I need to rename the columns of the d… Read more Is It Possible To Directly Rename Pandas Dataframe's Columns Stored In Hdf5 File?

Finding A Duplicate In A Hdf5 Pytable With 500e6 Rows

Problem I have a large (> 500e6 rows) dataset that I've put into a pytables database. Lets … Read more Finding A Duplicate In A Hdf5 Pytable With 500e6 Rows

Query Hdf5 In Pandas

I have following data (18,619,211 rows) stored as a pandas dataframe object in hdf5 file: … Read more Query Hdf5 In Pandas

Creating Hdf5 Compound Attributes Using H5py

I'm trying to create some simple HDF5 datasets that contain attributes with a compound datatype… Read more Creating Hdf5 Compound Attributes Using H5py

Difference Between Str() And Astype(str)?

I want to save the dataframe df to the .h5 file MainDataFile.h5 : df.to_hdf ('c:/Temp/MainData… Read more Difference Between Str() And Astype(str)?

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

Python H5py - Why Do I Get A Broadcast Error?

I am trying to read a .h5 file data.h5, which has 2 datasets, 'Data' and 'metaData'… Read more Python H5py - Why Do I Get A Broadcast Error?

How To Compress The Data That Saved In Hdf5?

I am using python 2.7 to read a video and store in hdf5. This is my code import h5py import skvideo… Read more How To Compress The Data That Saved In Hdf5?

How To Speed Up Reading From Compressed Hdf5 Files

I have several big HDF5 file stored on an SSD (lzf compressed file size is 10–15 GB, uncompressed s… Read more How To Speed Up Reading From Compressed 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

Python H5py: Can I Store A Dataset Which Different Columns Have Different Types?

Suppose I have a table which has many columns, only a few columns is float type, others are small i… Read more Python H5py: Can I Store A Dataset Which Different Columns Have Different Types?

Inserting Many Hdf5 Datasets Very Slow

There is a dramatic slowdown when inserting many datasets into a group. I have found that the slowd… Read more Inserting Many Hdf5 Datasets Very Slow

Typeerror: Read_hdf() Takes Exactly 2 Arguments (1 Given)

How to open a HDF5 file with pandas.read_hdf when the keys are not known? from pandas.io.pytables … Read more Typeerror: Read_hdf() Takes Exactly 2 Arguments (1 Given)

Most Efficient Way To Use A Large Data Set For Pytorch?

Perhaps this question has been asked before, but I'm having trouble finding relevant info for m… Read more Most Efficient Way To Use A Large Data Set For Pytorch?

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

Loading Hdf5 Matlab Strings Into Python

I'm running into trouble reading a hdf5 matlab 7.3 file with Python. I'm using h5py 2.0.1. … Read more Loading Hdf5 Matlab Strings Into Python