Path: csiph.com!weretis.net!feeder4.news.weretis.net!feeder5.news.weretis.net!news.solani.org!.POSTED!not-for-mail
From: Karl Ratzsch <mail.kfr@gmx.net>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Can use unwrap with input data associated with a function?
Date: Fri, 25 May 2018 09:46:02 +0200
Organization: solani.org
Lines: 26
Message-ID: <pe8evr$ogc$1@solani.org>
References: <alpine.WNT.2.20.1805250905200.11560@dhcp3-6>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Trace: solani.org 1527234363 25100 eJwFwQkBwDAIA0BLLeWLnAHBv4Td2fPrHermamtbx4nhhDgHac1ZkTmttz9wgX7FRK6wEfUDObMSRA== (25 May 2018 07:46:03 GMT)
X-Complaints-To: abuse@news.solani.org
NNTP-Posting-Date: Fri, 25 May 2018 07:46:03 +0000 (UTC)
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0
In-Reply-To: <alpine.WNT.2.20.1805250905200.11560@dhcp3-6>
Cancel-Lock: sha1:5D/1qGAJFP58zUx40qrGFU3dNVc=
Content-Language: de-DE-1901
X-User-ID: eJwNxMEBwCAMAsCVGhNAx1Fq9h+hvcchGbSKYKHR7zPpTGn1rIPD3C1L/kcO+UbH2pd+HDX8ARrTET0=
X-NNTP-Posting-Host: eJwFwQERADEIAzBLv4MWKucZ4F/CEhgPbzhBx2KLvBtdsPQxZR+/HRRGo/rtU7SHctAOYR8hPxEI
Xref: csiph.com comp.graphics.apps.gnuplot:3948

Am 25.05.2018 um 09:15 schrieb Jean-Pierre Coulon:
> My input file "phasedata.txt" contains:
> 1e3 -10
> 3e3 -38
> 1e4 -40
> 3e4 -78 1e5 -80
> 
> My gnuplot file is:
> reset; set log x; set nolog y; set angle degrees; set grid
> set xrange [1e3:1e5]; set yrange [-180:180]; jay = {0,1}; p(x) = jay*x
> other(x) = 1/((1 + p(x)/1e4)*(1 + p(x)/1e4)*(1 + p(x)/1e4))
> set format y "%.0f%c\260"
> set ytics 90; set mytics 2
> plot "phasedata.txt" with lines title "simple input data",\
> arg(other(x)) title "other function",\
> "phasedata.txt" us 1:($2 +arg(other($1))) with lines title "with other
> function, as is",\
> "phasedata.txt" us 1:($2 +arg(other($1))) with lines  title
> "unwrapped"
> 
> My 3rd plot is correct by my 4th plot is not, even in the [1000:10000]
> domain, where no unwrap job is required. Why?


I'd say thats a bug. Looks like "smooth unwrap" does not like the "angle
degree" setting.