How to save Numpy 4D array to CSV?

Question

I am trying to save a series of images to CSV file so they can be used as a training dataset for Alexnet Keras machine learning. The shape is (15,224,224,3).

So far I am having issue doing this. I have managed to put all data into a numpy array but now I cannot save it to a file.

Please help.

dennissv · Accepted Answer · 2018-09-30 09:52:04Z

22

I don't think saving it to a csv file is the correct way to do this, it's used for 1d or 2d data to create a table-like structure, so I'm going to offer another solution. You can use np.save to save any numpy array to a file;

np.save('file_name', your_array)

which can then be loaded using np.load;

loaded_array = np.load('file_name.npy')

Hope that this works for you.

answered Sep 30, 2018 at 9:52

dennissv

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lifeisshubh · Accepted Answer · 2018-09-30 14:53:58Z

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You can try using pickle to save the data. It is much more diverse and easy to handle compare to np.save.

answered Sep 30, 2018 at 14:53

lifeisshubh

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1 Comment

Bentoy13 Over a year ago

Note that pickle is considered as not secure.

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