08-21-2015
Yes, it is easy to do something like this with an awk script...
Normally, a CSV file would have the same number of fields in every output line. There doesn't seem to be anything in your input file that indicates how many fields are present in the data. (We know that it is at least 101 fields, but we have no idea how many zero fields should appear at the ends each output line.) How is your script supposed to determine the number of fields to include in the output?
A CSV file also usually uses a comma as the field separator, but you seem to want a space character as the field separator. Is that correct?
Will there ever be anything other than :1 at the ends of the input fields (other than the 1st field)? For example, if a line had a lot of ones and a few zeros, could the input use fields ending with :0 instead of :1 to produce a shorter input line? Is all of the data you want to process in this same format? For example, the "diabetes" files on the site you referenced are in a completely different format.
Will each input line have the same number of fields as in your sample input? Or, can the number of ones in input and output lines vary?
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JOIN(1) General Commands Manual JOIN(1)
NAME
join - relational database operator
SYNOPSIS
join [ options ] file1 file2
DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If file1 is `-', the standard
input is used.
File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in
each line.
There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con-
sists of the common field, then the rest of the line from file1, then the rest of the line from file2.
Fields are normally separated by blank, tab or newline. In this case, multiple separators count as one, and leading separators are dis-
carded.
These options are recognized:
-an In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-e s Replace empty output fields by string s.
-jn m Join on the mth field of file n. If n is missing, use the mth field in each file.
-o list
Each output line comprises the fields specified in list, each element of which has the form n.m, where n is a file number and m is a
field number.
-tc Use character c as a separator (tab character). Every appearance of c in a line is significant.
SEE ALSO
sort(1), comm(1), awk(1)
BUGS
With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort.
The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous.
7th Edition April 29, 1985 JOIN(1)