concat fields

markjason · #1 (**permalink**) 10-22-2006

hi

I have a file, I need to concatenate depening on the no of columns i need to concatenate.
for example i need to concatenate field1,filed34,field2( no of columns is not always 3, it can be any number of fields)
concat.ksh field1 field34 field2

how to achieve this, is there any argv ,argc equivalent in ksh.

Hope i am clear

Mark.

vino · #2 (**permalink**) 10-22-2006

You shoud look at the $# and $1, $2,... constructs for ksh. In short $# gives you the number of command line parameters, and $1, $2 gives the parameter1, parameter2. Read man ksh for more details.

napolayan · #3 (**permalink**) 10-23-2006

just remove the spaces in each line using sed

cat file|while read line
do
sed 's/ //'
done>output_file

markjason · #4 (**permalink**) 10-23-2006

sorry , i didn't phrase the question correctly.
actually i have those particular fields that needs to be concatenated in a variable.

like this
var1 = 1 24 3

so i need to concatenate these fields, please let me know.

Thanks
Mark.

jim mcnamara · #5 (**permalink**) 10-23-2006

start with awk

Code:

#!/bin/ksh
# $1 $2 $3 equal a field number  eg, 1 7 32
echo "$myvariable" | awk -v one=$1 -v two=$2 -v three=$3 '{ print $one $two $three  }' | read new_variable
# new_variable has the three fields concatenated

markjason · #6 (**permalink**) 10-23-2006

Jim, this works if we know how many fields we are concatenating.,

in my case, i have n number of fields in the variable that needs to be concatenated.

How can i achieve this. Thanks all for your help.

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