Login or Register to Ask a Question and Join Our Community


UNIX for Dummies Questions & Answers

how to count number of rows and sum of column using awk

 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers how to count number of rows and sum of column using awk
# 1  
Old 05-18-2010
how to count number of rows and sum of column using awk
Hi All,

I have the following input which i want to process using AWK.

Rows,NC,amount
1,1202,0.192387
2,1201,0.111111
3,1201,0.123456


i want the following output

count of rows = 3 ,sum of amount = 0.426954

Many thanks
# 2  
Old 05-18-2010
Code:
awk -F, 'NR>1 {rows++; sum+=$2} 
           END{print "count of rows=", rows, "sum of amount=", sum} ' inputfile

# 3  
Old 05-20-2010
Quote:
Originally Posted by jim mcnamara
Code:
awk -F, 'NR>1 {rows++; sum+=$2} 
           END{print "count of rows=", rows, "sum of amount=", sum} ' inputfile

A small change please Smilie

A separate rows variable is not needed, just this would do
Code:
awk -F, ' NR > 1 { sum += $2 }END{ print NR-1, sum }' filename

This User Gave Thanks to matrixmadhan For This Post:
pistachio
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Count Repetitive Number in a column and renumbering using awk

Unable to get the desired output. Need only the rows which has repeated values in column 5. Input File <tab separated file> chr1 3773797 3773797 CEP10 1 chr1 3773797 3773797 CEP104 2 chr1 3689350 3689350 SMIM1 2 chr1 3773797 3773797 CEP4 3 chr1 3773797 3773797 EP104 ... (7 Replies)
Discussion started by: himanshu
7 Replies

2. UNIX for Beginners Questions & Answers

Copy columns from one file into another and get sum of column values and row count

I have a file abc.csv, from which I need column 24(PurchaseOrder_TotalCost) to get the sum_of_amounts with date and row count into another file say output.csv abc.csv- UTF-8,,,,,,,,,,,,,,,,,,,,,,,,, ... (6 Replies)
Discussion started by: Tahir_M
6 Replies

3. UNIX for Dummies Questions & Answers

Script to count number of rows

Hi, I need a solaris shell script to read multiple files and count number of unique name rows(strings) from those files. The input and output should be like this Input: file 1 abc cde abc ... (9 Replies)
Discussion started by: ssk250
9 Replies

4. Shell Programming and Scripting

awk code to ignore the first occurence unknown number of rows in a data column

Hello experts, Shown below is the 2 column sample data(there are many data columns in actual input file), Key, Data A, 1 A, 2 A, 2 A, 3 A, 1 A, 1 A, 1 I need the below output. Key, Data A, 2 A, 2 A, 3 A, 1 A, 1 A, 1 (2 Replies)
Discussion started by: ks_reddy
2 Replies

5. UNIX for Dummies Questions & Answers

count number of distinct values in each column with awk

Hi ! input: A|B|C|D A|F|C|E A|B|I|C A|T|I|B As the title of the thread says, I would need to get: 1|3|2|4 I tried different variants of this command, but I don't manage to obtain what I need: gawk 'BEGIN{FS=OFS="|"}{for(i=1; i<=NF; i++) a++} END {for (b in a) print b}' input ... (2 Replies)
Discussion started by: beca123456
2 Replies

6. UNIX for Dummies Questions & Answers

Sum the rows number based on first field string value

Hi, I have a file like this one h1 4.70650E-04 4.70650E-04 4.70650E-04 h2 1.92912E-04 1.92912E-04 1.92912E-04 h3A 3.10160E-11 2.94562E-11 2.78458E-11 h4 0.00000E+00 0.00000E+00 0.00000E+00 h1 1.18164E-12 2.74150E-12 4.35187E-12 h1 7.60813E-01 7.60813E-01 7.60813E-01... (5 Replies)
Discussion started by: f_o_555
5 Replies

7. UNIX for Dummies Questions & Answers

count number of rows based on other column values

Could anybody help with this? I have input below ..... david,39 david,39 emelie,40 clarissa,22 bob,42 bob,42 tim,32 bob,39 david,38 emelie,47 what i want to do is count how many names there are with different ages, so output would be like this .... david,2 emelie,2 clarissa,1... (3 Replies)
Discussion started by: itsme999
3 Replies

8. Shell Programming and Scripting

how to add the number of row and count number of rows

Hi experts a have a very large file and I need to add two columns: the first one numbering the incidence of records and the another with the total count The input file: 21 2341 A 21 2341 A 21 2341 A 21 2341 C 21 2341 C 21 2341 C 21 2341 C 21 4567 A 21 4567 A 21 4567 C ... (6 Replies)
Discussion started by: juelillo
6 Replies

9. Shell Programming and Scripting

awk count characters, sum, and divide by another column

Hi All, I am another biologist attempting to parse a large txt file containing several million lines like: tucosnp 56762 T Y 228 228 60 23 .CcCcc,,..c.c,cc,,.C... What I need to do is get the frequency of periods (.) plus commas (,) in column 9, and populate this number into another... (1 Reply)
Discussion started by: peromhc
1 Replies

10. UNIX for Dummies Questions & Answers

How to sum rows in e.g. column 1 by a category in e.g. column 2

Hi, I've shown an example of what I would like to achieve below. In the example file, I would like to sum the values in column 2 for each distinct category in column 3 (presumably making an array?) and print the sum as well as the category name and length (note:length always corresponds with... (8 Replies)
Discussion started by: auburn
8 Replies
Login or Register to Ask a Question