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Hands-on: Input and output
Explore NumPy's in-built file I/O
In this exercise we study how to read and write arrays to disk.
Source code for this exercise is located in numpy/input-output/
File numpy/input-output/xy-coordinates.dat contains a list of (x,y) value
pairs. Read the data with numpy.loadtxt(). Add then 2.5 to all y values and
write the new data into a file using numpy.savetxt().
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