Only a question, if i need to run this command inside a C programm under UNIX shell i should use the system(); and put inside the parenthesis the command??
I'd put it in a script and invoke the script using system(), much cleaner than trying to force the script into a C string.
If your file is named list_cols.ksh and is in a directory that is in the PATH, then your system() call should just be: ---------- Post updated at 21:34 ---------- Previous update was at 21:07 ----------
It's messy, and I'd have to think hard about approving it during a code walk through, but you could put it in a system() call directly if you don't want to maintain the additional script:
Last edited by agama; 11-09-2011 at 10:20 PM..
Reason: a wee bit more info
hi All,
Thi sis very urgent.
I have large files with pipe delimited.
For example:
1.txt
1001024|120|9|-0.0|#|
1001025|120|9|#|
1001026|120|9|#|
1001032|120|2|-0.0|#|
1002026|110|9|#|
1002027|110|9|-0.0|#|
1002028|120|1|1.0|#|
I need to replace the 4th filed if it is # by |-|
my... (2 Replies)
I have a input file that has some common values in 1st,2nd and 3rd columns. 4th and 5th are different. Now I would like to print the mean of the fourth column of similar values in 1st.2nd and 3rd columns along with all the values in 5th column.
input
NM_0 1.22 CR5 0.4 n_21663... (10 Replies)
HELLO! This is my first post here! By the way, I think it is great that people do this.
My question:
I have two files, one is a .dilm and one is a .txt. It is my understanding that the .dilm file can be treated as a .txt file. I wrote another program where I was able to manipulate it as if it... (3 Replies)
I have this space delimited large text file with more than 1,000,000+ columns and about 100 rows. I want to delete all the columns that start with NA such that:
File before modification
aa bb cc NA100 dd
aa b1 c2 NA101 de
File after modification
aa bb cc dd
aa b1 c2 de
How would I... (3 Replies)
Hi group,
Can you please tell how to delete specific columns from a file.
I know something like
awk -F, '{ print $1" "$2" "15 }' input.txt > output.txt will delete all other columns. But this is in a way to copy some particular columns.
But is there any other way to select just some... (11 Replies)
I am trying to find a specific set of characters in a long file. I only want to find the characters in column 265 for 4 bytes.
Is there a search for that? I tried cut but couldn't get it to work.
Ex. I want to find '9999' in column 265 for 4 bytes. If it is in there, I want it to print... (12 Replies)
Hi
I have a file which is tab-delimited. Now, I'd like to print the lines which have "chr6" string in both first and second columns. Could anybody help? (3 Replies)
Hi,
I'd like to intersect two files by the 4th col of the first file and 6th col of the second file. This is the code I use:
awk 'NR==FNR{A;next}$6 File1 File2
However, this is only outputting the second file lines. I'd like to have both lines in a single line separated by a tab.
Thanks in... (25 Replies)
I am trying to search a list of strings from a file and display the string as well as the column in the search file it was found. I dont care about the row. what is wrong with my script?
while read line; do awk -v var="$line" '{for(i=1;i<NF;i++) if ($NF==$var) break; print $var FS $NF' }'... (3 Replies)
i have a file (csv or txt or anything which has 4 columns (id,name,number,location) and it contains data. i want to convert the data of specific columns like name to ooooo and number to 88888 matching the field length of that columns.
for example
if name column has
anthony which is 7, it should... (2 Replies)