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How to count the frequncey of a certain value in one column?

 
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# 1  
Old 11-21-2012
How to count the frequncey of a certain value in one column?
Hi all,
I have file like this:
FID IID MISS_PHENO N_MISS N_GENO F_MISS
AU4103 AU4103201 Y 15473 66858 0.2314
AU4142 AU4142303 Y 15464 66858 0.2313
AU4128 AU4128304 Y 15458 66858 0.2312
AU4129 AU4129202 Y 15451 66858 0.2311
AU3934 AU3934201 Y 15441 66858 0.231
AU3934 AU3934304 Y 15448 66858 0.2311
AU3934 AU3934302 Y 15466 66858 0.2313
AU3934 AU3934202 Y 15483 66858 0.2316
AU4012 AU4012201 Y 15460 66858 0.2312

In column 3, I have both "Y" and "N", how can I count how many "Y" and "N" are in this column?

thanks!
# 2  
Old 11-21-2012
Try:
Code:
awk 'FNR==1{next}
{       v[$3]++ }
END {   for(i in v) printf("\"%s\" found %d times\n", i, v[i])
        printf("Total lines in file(s) (including titles): %d\n", NR)}' file

# 3  
Old 11-22-2012
Code:
 
awk 'NR>1{print $3}' input.txt | sort | uniq -c

 
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