Output first unique record in csv file Post: 302882733

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to delete a record from a csv file

Hi Guys I have downloaded a table from oracle database in .csv format. it has many fields as Title, First Name, Last Name etc. I have to download distinct titles from database and now i have to check all those titles from data of First Name one by one. and then i have to delete matched record....

2. Shell Programming and Scripting

Record count of a csv file

Hello Gurus, We have a requirement to count the valid number of records in a comma delimited file with double quotes. The catch here is..few records have a new line carriage within the double quotes,,say for ex:we have a file called accounts the record count is 4827..but the actual valid count...

3. Shell Programming and Scripting

Split long record into csv file

Hi I receive a mainframe file which has very long records (1100 chars) with no field delimiters. I need to parse each record and output a comma delimited (csv) file. The record layout is fixed. If there weren't so many fields and records I would read the file into Excel, as a "fixed width"...

4. Shell Programming and Scripting

return a list of unique values of a column from csv format file

Hi all, I have a huge csv file with the following format of data, Num SNPs, 549997 Total SNPs,555352 Num Samples, 157 SNP, SampleID, Allele1, Allele2 A001,AB1,A,A A002,AB1,A,A A003,AB1,A,A ... ... ... I would like to write out a list of unique SNP (column 1). Could you...

5. Shell Programming and Scripting

csv file - adding total to a trailer record

Hi, I have a script which creates and modifies a csv file. I have managed to do everything I need to do apart from 1 thing. I need to append a trailer record to the file. I need this line to hold the total of an entire column of the csv file (skipping the 1st line which is a header). Can...

6. Shell Programming and Scripting

List unique values and count instances in .csv file

I need to take the second column of a .csv file and count the number of instances of each unique value in that same second column. I'd like the output to be value,count sorted by most instances. Thanks for any guidance! Data example: 317476,317756,0 816063,318861,0 313123,319091,0...

7. Linux

To get all the columns in a CSV file based on unique values of particular column

cat sample.csv ID,Name,no 1,AAA,1 2,BBB,1 3,AAA,1 4,BBB,1 cut -d',' -f2 sample.csv | sort | uniq this gives only the 2nd column values Name AAA BBB How to I get all the columns of CSV along with this?

8. Shell Programming and Scripting

Save output of updated csv file as csv file itself

Hi, all I want to sort a csv file based on timestamp from oldest to newest and save the output as csv file itself. Here is an example of my csv file. test.csv SourceFile,DateTimeOriginal /home/intannf/foto/IMG_0739.JPG,2015:02:17 11:32:21 /home/intannf/foto/IMG_0749.JPG,2015:02:17 11:37:28...

9. Shell Programming and Scripting

Save output of updated csv file as csv file itself, part 2

Hi, I have another problem. I want to sort another csv file by the first field. result.csv SourceFile,Airspeed,GPSLatitude,GPSLongitude,Temperature,Pressure,Altitude,Roll,Pitch,Yaw /home/intannf/foto5/2015_0313_090651_219.JPG,0.,-7.77223,110.37310,30.75,996.46,148.75,180.94,182.00,63.92 ...

10. Shell Programming and Scripting

CSV File:Filter duplicate records from column1 & another column having unique record

Hi Experts, I have csv file with 30, 40 columns Pasting just 2 column for problem description. Need to print error if below combination is not present in file check for column-1 (DocumentNumber) and filter columns where value in DocumentNumber field is same. For all such rows, the field...

LEARN ABOUT REDHAT

ppmtopgm

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and	pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								   10 April 2000						       ppmtopgm(1)