Print a bar graph

SCALE=3; WIDTHL=10; WIDTHR=60; BAR="12345678"; BAR="${BAR//?/==========}"; while read LEFT RIGHT rest ; do RIGHT=$((RIGHT/SCALE)); printf "%${WIDTHL}s: %-${WIDTHR}s\n" "${LEFT:0:$WIDTHL}" "|${BAR:0:$RIGHT}*"; done < dataset.dat
WIDTHL=10 and WIDTHR=60 are setting the widths of the left and the right column/bar. BAR="12345678" etc. is used to create a 80 char long string of "="s. I didn't know any shorter way. If you want to pipe results into it, wrap the whole thing in ( ... ) I know that printing bar graphs can be done rather easily by other means. Here, I was looking for a Bash only variant.
Sample Output
$ cat dataset.dat
Irene     10
Karen     37
Andreas   41
Beatrice  23
$ SCALE=1; WIDTHL=10; WIDTHR=60; BAR="12345678"; BAR="${BAR//?/==========}"; while read LEFT RIGHT rest ; do RIGHT=$((RIGHT/SCALE)); printf "%${WIDTHL}s: %-${WIDTHR}s\n" "${LEFT:0:$WIDTHL}" "|${BAR:0:$RIGHT}*"; done < dataset.dat
     Irene: |==========*
     Karen: |=====================================*
   Andreas: |=========================================*
  Beatrice: |=======================*

0
By: andreasS
2011-08-22 19:35:21

What Others Think

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seofox · 34 weeks and 4 days ago
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seofox · 33 weeks and 5 days ago
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BestComments74 · 16 weeks and 4 days ago
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rahimhh21 · 5 weeks and 1 day ago

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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