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From: Karl Ratzsch <mail.kfr@gmx.net>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: space between sign and digit
Date: Wed, 11 Jul 2018 15:16:34 +0200
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Am 11.07.2018 um 14:16 schrieb Jörg Buchholz:
> On 11.07.2018 10:00, Karl Ratzsch wrote:
>> plot f11(x) lt 2 lw 4 dt 4 t \
>>   sprintf("f11(x) =%.2f·x %s %.2f",a,b11<0?"-":"+",abs(b11))
>>
> 
> Interesting solution. On more complex functions the code is a bit long.

You're welcome. ;-) This looks a bit nicer

  nstr(x) = sprintf("%s %.2f",x<0?"-":"+",abs(x)) # return string with a
space between sign and number

  plot f11(x) title sprintf("f11(x) =%.2f·x %s",a,nstr(b11))

or you can even outsource the whole sprintf() call into a function

  tstr(n,a,b) = sprintf("%s = %.2f·x %s %.2f",n,a,b<0?"-":"+",abs(b))

  plot f11(x) title tstr("f11(x)",a,b11)

so your plot command stays readable.