getting a substring from a string


 
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# 1  
Old 03-09-2005
getting a substring from a string

hi all,

I am trying to extract SUBSTRINGS out of a string using ksh.

The string is "SAPR3K.FD0.FA.TJ.B0010.T050302"

I tried using
a= `expr substr $stringZ 1 2`
which is giving me a syntax error, donno why??

any ideas why its not working??

I also tried
echo "welcome" | awk '{ print substr( $0, 0, 4 ) }'
which is working but I want to have the resltant substring in a variable and process further.

tanx......

Last edited by maradona; 03-09-2005 at 11:57 AM..
# 2  
Old 03-09-2005
what EXACTLY are you trying to extract in the above examples?
pls give sample input and a desired output.
# 3  
Old 03-09-2005
getting a substring from a string

Hi, I am trying to get "10" as a variable and "02" as a variable.
i.e. Input string = SAPR3K.FD0.FA.TJ.B0010.T050302
and desired output string lets say v1 = 10 (at 21st position in the string)and v2 = 02(at 29th position)
# 4  
Old 03-09-2005
I have n't seen any problem except

a= `expr substr $stringZ 1 2`

change it as

a=`expr substr $stringZ 1 2` # remove the space
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