Reading Data from a File

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• the file data.txt contains data stored in a text file
• load the data into Python and plot x vs. y
• use the command data=io.read_array('data.txt',separator='\t')
• note that if you type data at the prompt and hit enter, the first row of your matrix is [0, 0]. This is because Python didn't know what to do with the column labels in the txt file. Try this instead:
• data=io.read_array('data.txt',separator='\t', lines=(1,-1))
• lines=(1,-1) tells Python to throw away the zeroth row