## When do you need save a numpy.ndarray into a txt file?

If you want to check value of numpy.ndarray, share your data to others or use other application to process numpy.ndarray data. You may need save numpy.ndarray into a txt file so that you can reused it.

## How to save?

We can use numpy.savetxt() function, you must notice that this function only can save numpy.ndarray.

## How to read from txt file?

If you get a txt file that saves a numpy.ndarray. How to read this data to a variable so that you can process it by your algorithm. Here you can use numpy.loadtxt() function.

>>> import numpy as np >>> data = np.arange(0,1,0.1) >>> np.savetxt("np.txt",data) # save numpy.ndarray to txt file >>> load_data = np.loadtxt("np.txt") # read numpy.ndarray from txt file >>> load_data array([ 0. , 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9])