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how to generate random number as as the first column of a txt file

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# 1  
Old 10-22-2012
how to generate random number as as the first column of a txt file

Dear all,

I have a question. I have a txt file say 4000 rows X 1800 Column. I 'd like to creat a new column as the first column which is a column of random numbers (n=4000)

thanks a lot!

# 2  
Old 10-22-2012
What's your system? On something like Solaris, any of the standard system utilities are liable to refuse to operate on a text file that wide...
# 3  
Old 10-22-2012
Your request is underspecified. Is repetition allowed? The numbers must be integers? What exactly is the interval which the numbers can span? Be precise if the interval includes the endpoints. Does this interval vary with the contents of the file or is it fixed?


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