Shell Programming and Scripting

Hello,

I am new to shell programming, and Unix development overall.

I have a following text file with the following contents:

..
Sunny
Monday: x
Tuesday: x
Wednesday: x
Thursday: x
Friday: x
Cloudy
Monday: x
Tuesday: x
Wednesday: x
Thursday: x
Friday: x
Precipitation
Monday: x
Tuesday: x
Wednesday: 50%
Thursday: x
Friday: x
..

I need to extract the Precipitation for Wednesday (I just need the 50%). Position of Precipitation is not always the same in the file. I have tried to use grep and awk, but have not been successful so far, probably because I haven't used awk before now.

Does anyone have any ideas? If so, please help.

Thank you in advance,

Selma

try something like :
IFS=:
awk -F '{print $2}' input file | grep -v 'x'
should work!!
moxxx68

Thanks for the quick reply. Could you please explain it a little bit more? I do not see where in this command does it say "search for 'precipitation'".

-> Wednesday: 50%
-> Thursday: x

awk -F '{print $2}' input file = recupere the second word (50% and x)

|grep -v 'x' = exlude the character "x"

Also you could used :
awk -F '{print $2}' input file | grep %
you recupere only the %

It is the same result

Yes, that's how I understood it as well. But this doesn't help me with my problem. Xs were there just in place of some other numbers, I don't acutally get Xs in the file I need to parse, so if for example I have:

Sunny
Monday: 10
Tuesday: 15
Wednesday: 53
Thursday: 57
Friday: 8
Cloudy
Monday: 35
Tuesday: 7
Wednesday: 95
Thursday: 68
Friday: 98
Precipitation
Monday: 15
Tuesday: 29
Wednesday: 50
Thursday: 26
Friday: 1
...

then the suggested command would return all of the numbers in the second column if I understand this correctly.
The point here is that I need to find the Precipitation category first, and then get data for Wednesday only. Can you help me with that?

Sorry if my first example was confusing.

Thank you.

try
IFS=:
grep -nA7 'Precipitation' | awk -F '/Wednesday/{print $2)
should work..
or alternately
grep -nA7 'Precipitation' | awk '-F /Wednesday/{print, "Precipitation:" $2)
hope that solves the problem
moxxx68

I'd personally use sed

Code:

#!/bin/sed -nf

/Precipitation/,/^[^:]*$/ {
   /Wednesday/p
}

Then invoke with
foo.sed filename_here

Cheers
ZB