How do I calculate the mean of a column

Question

Anyone know how can I calculate the mean of one these columns (on linux)??

sda               2.91    20.44    6.13    2.95   217.53   186.67    44.55     0.         


        

Answer 1

You can use python for that, is available in Linux.

If that comes from a file, take a look at this question, just use float instead.

For instance:

#mean.py 
def main():
    with open("mean.txt", 'r') as f:
        data = [map(float, line.split()) for line in f]

    columnTwo = []
    for row in data:
        columnTwo.append( row[1] )

    print  sum(columnTwo,0.0) / len( columnTwo )



if __name__=="__main__":
    main()

Prints 14.38

_{I just include the data in the mean.txt file, not the row header: "sda"}