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From: Karl Ratzsch <mail.kfr@gmx.net>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: iec80000 notation
Date: Mon, 22 Jun 2015 22:54:33 +0200
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Am 18.06.2015 um 20:08 schrieb Karl-Friedrich Ratzsch:
> 
> For axis labels, there is a provision for automatic ki, Mi, Ti
> notation, check "help format specifiers".
> 
> Otherwise you can build your own function returning the proper prefixes:
> 
> fstring(x) = sprintf("%.f ",\
> 		 x<2**10 ? (ps="",x) :\
> 		 x<2**20 ? (ps="Ki", x/2**10) : \
> 		 x<2**30 ? (ps="Mi", x/2**20) :\
> 		           (ps="Ti", x/2**30)).ps."Byte"
> 

or use gnuplots gprintf() function that knows the "%b %B" format