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Appending lines with word frequencies, ordering and indexing a column

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# 1  
Old 01-01-2011
Appending lines with word frequencies, ordering and indexing a column

Dear All,

I have the following input data:
w1	20	g1
w1	10	g1
w2	12	g1
w2	23	g1
w3	10	g1
w3	17	g1
w3	12.5	g1
w3	21	g1
w4	11	g1
w4	13.2	g1
w4	23	g1
w4	18	g1

First I seek to find the word frequencies in col1 and sort col2 in ascending order for each change in a col1 word. Second, append the frequencies and orders to each line such as:

W	Z	U	freq(W)	Z-order

w1	10	g1	2	1
w1	20	g1	2	2
w2	12	g1	2	1
w2	23	g1	2	2
w3	10	g1	4	1
w3	12.5	g1	4	2
w3	17	g1	4	3
w3	21	g1	4	4
w4	11	g1	4	1
w4	13.2	g1	4	2
w4	18	g1	4	3
w4	23	g1	4	4

I trying to complete the following code but not making any headway:

awk 'NR==FNR{words[++nwords]=$1;next}
print words[w], freq[words[w]]+0}' infile

I therefore need your help.

Many thanks,

# 2  
Old 01-02-2011
Try this,

sort -nk2,1 sortfile | awk 'NR==FNR{if(s!=$1){j=0;s=$1}a[$1]=++j;next} {if(p!=$1){i=0;p=$1}if(a[p]){$4=a[p]}$5=++i;print }' input_file input_file

# 3  
Old 01-02-2011
NR==FNR is only useful when there is more than one input file. Try this, assuming column one is in sorted order:
awk 'function pr(){if(p)for(i=1;i<=n;i++){print A[i],n,i;delete A[i]};p=$1;n=0}p!=$1{pr()}{A[++n]=$0}END{pr()}' OFS='\t' infile

Last edited by Scrutinizer; 01-03-2011 at 01:08 AM..
This User Gave Thanks to Scrutinizer For This Post:
# 4  
Old 01-02-2011
Dear pravin27

First many thanks for your reply.

I tried your code replacing "sortfile" with "input_file":
sort -nk2,1 sortfile | awk 'NR==FNR{if(s!=$1){j=0;s=$1}a[$1]=++j;next} {if(p!=$1){i=0;p=$1}if(a[p]){$4=a[p]}$5=++i;print }' input_file input_file

but some how the ascending order sort on col2 does not work. It produces the same output as that of Scrutinizer. Is there something I am missing?


# 5  
Old 01-03-2011
Hi Ghetz,

Sorry ....

Try this,

sort -nk2,1 inputfile -o inputfile; awk 'NR==FNR{if(s!=$1){j=0;s=$1}a[$1]=++j;next} {if(p!=$1){i=0;p=$1}if(a[p]){$4=a[p]}$5=++i;print }' OFS="\t" inputfile inputfile

Last edited by pravin27; 01-03-2011 at 01:35 AM..
This User Gave Thanks to pravin27 For This Post:
# 6  
Old 01-03-2011
Many thanks pravin27,

Your code works beautifully.



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