Bug #910
psxy vector head on line
| Status: | Closed | Start date: | 2016-05-24 | |
|---|---|---|---|---|
| Priority: | Normal | Due date: | ||
| Assignee: |  Paul | % Done: | 100% | |
| Category: | - | |||
| Target version: | Candidate for next bugfix release | |||
| Affected version: | 5.x-svn | Platform: |
Description
Hi,
I would like to plot a vector head on a straight line given x, y coordinates.
The following command (rewritten from an example in the psxy documentation) fails:
gmt psxy -R0/50/-50/50 -JX6i -W0.5p+v0.15i -Baf << EOF > map.ps 10 10 30 -20 EOF
No line is plotted at all.
In the psxy documentation under the -W argument it is stated:
+vvspecs will place a vector head at the ends of the lines. You can use +vb and +ve to specify separate vector specs at each end [shared specs]. See the Vector Attributes for more information.
Using the option -W0.1p+ve gives a warning: Warning: Length unit a not supported - revert to default unit [cm] and only the straight line is plotted.
Am I doing something wrong?
History
#1
Updated by Joaquim about 3 years ago
Please, use the Forum to ask questions.
#2
Updated by Joaquim about 3 years ago
- Tracker changed from Support to Bug
- Status changed from New to In Progress
- Affected version set to 5.x-svn
This is actually a bug. A map projection must be used in order this to work.
#3
Updated by Paul about 3 years ago
- Status changed from In Progress to Resolved
- Assignee set to Paul
- Target version set to Candidate for next bugfix release
- % Done changed from 0 to 100
Fixed in r16460. Now, even a Cartesian line of just 2 points gets resampled first to make sure lines that are potentially shortened due to vector heads will have 3+ points.