Thank you, Bob.
Both work great for me.
Bob Proulx wrote:
>
> maybee wrote:
>>
>> I have a string mq001234ms00567_b3.45_323x7,
>> and I want to subtract the numbers from it, that is,
>> I will get
>> mq=001234
>> ms=00567
>> b=3.45
>>
>> These number may have various digits.
>> Any neat way doing this under bash?
>
> I myself would use 'sed' (because I always have):
>
> x=mq001234ms00567_b3.45_323x7
>
> mq=$(echo "$x" | sed 's/mq\([[:digit:]]*\).*/\1/')
> echo "$mq"
> 001234
>
> ms=$(echo "$x" | sed 's/.*ms\([[:digit:]]*\).*/\1/')
> echo "$ms"
> 00567
>
> b=$(echo "$x" | sed 's/.*_b\([0-9][0-9]*[.][0-9][0-9]*\).*/\1/')
> echo "$b"
> 3.45
>
> But it certainly seems reasonable to use the bash parameter expansion
> methods to do something similar.
>
> $ echo ${x%%ms*}
> mq001234
>
> But my brain doesn't think that way and so I didn't work up a full
> procedure.
>
> Bob
>
>
>
>
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