setting vector head shape

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Dear all,

Is it possible in GMT5 to control the shape of vector heads? I'd like to
make a short, fat vector with a head wider than the bar, but keep finding
that the shorter it gets, the smaller the head becomes (even if I don't set
the +n option...). I can make the bar thick (eg. using -W25p), but the head
remains the same size, leaving me with a head that's thinner than the bar!
For example:

echo "0 0 1 .5 " |gmt psvelo -Jx0.4/0.4 -R-10/10/-10/10 -B2g10 -W25p -L
-Se3/0/18 -A30p+e -P -V > test.ps

Changing the head size directly (eg. -A90p+e) makes the head wider, but too
long. Ideally, I'd like to make something more like this arrow:

http://www.wpclipart.com/blanks/arrows/arrows_BW/arrow_hollow_right.png

I'm stumped -- there must be a clean way to do this.

Eric

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<div dir=3D"ltr">Dear all,<div><br></div><div>Is it possible in GMT5 to con=
trol the shape of vector heads? I&#39;d like to make a short, fat vector wi=
th a head wider than the bar, but keep finding that the shorter it gets, th=
e smaller the head becomes (even if I don&#39;t set the +n option...). I ca=
n make the bar thick (eg. using -W25p), but the head remains the same size,=
 leaving me with a head that&#39;s thinner than the bar! For example:</div>
<div><br></div><div>echo &quot;0 0 1 .5 &quot; |gmt psvelo -Jx0.4/0.4 -R-10=
/10/-10/10 -B2g10 -W25p -L -Se3/0/18 -A30p+e -P -V &gt; <a href=3D"http://t=
est.ps">test.ps</a><br></div><div><br></div><div>Changing the head size dir=
ectly (eg. -A90p+e) makes the head wider, but too long. Ideally, I&#39;d li=
ke to make something more like this arrow:</div>
<div><br></div><div><a href=3D"http://www.wpclipart.com/blanks/arrows/arrow=
s_BW/arrow_hollow_right.png">http://www.wpclipart.com/blanks/arrows/arrows_=
BW/arrow_hollow_right.png</a><br></div><div><br></div><div>I&#39;m stumped =
-- there must be a clean way to do this.</div>
<div><br></div><div>Eric<br></div></div>
Mailing list for GMT discussions of all kinds.  If you are not sure you have found a bug, discuss it here first.
To formally report bugs or request features, please register and add New Issue on gmt.soest.hawaii.edu
To unsubscribe, send the message &quot;signoff gmt-help&quot; to <a href=3D"mailto:[email protected]">[email protected]</a>
Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on gmt.soest.hawaii.edu instead.

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