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I didn't get what you suggested..

alias PATTERN="${3:-grep whatever you want here}"

.....

COUNT=$(PATTERN|egrep "${start_tim}|${end_tim}" | awk ... etc etc ...)


While I need...

I think I have already checked this, here is the execution results:


[root@dsc02-1 vf]# ./r.sh metrics.csv.20180730_13_00 15 "grep Gx|grep -v RAR"
+ METRICS_FILE=metrics.csv.20180730_13_00
+...

Its a bash shell.
Any ways to make it work.

------ Post updated at 12:05 PM ------

Thanks for the prompt reply..
As stated the script is working fine if I do not give 3rd argument, this means...

HI
I am trying to use the following code in the shell script (using grep)


usage()
{
echo "Usage: ./$0 <file name> <interval> <pattern>"
}

METRICS_FILE=$1
INTERVAL=$2
PATTERN="$3" ...

Thanks for your feedback.
- this was not a question but an information.
- yes, we can use the one given by you in case the name pattern UP<number>.zip is not the same.

Try this:
for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
do
cp ../../../EditDistanceRandomParsimonator/RAxML_parsimonyTree.test4D20RI$i.0 intree
echo "Enter Option"
...

Right now there is no unix direct commad that can sort the files base on its name having numbers:
We can use the following:

In case your file name are like:
abc-UP018.zip
xyz-UP019.zip

ls...