if you want a wrap-around for all boundaries you need to
extend the plot command a little bit:
set clip points
set clip one
set clip two
l=3.
x1=0.5
y1=1.5
dx=3
dy=3
set xrange [x1:x1+dx]
set yrange [y1:y1+dy]
plot "datafile" using 1:2:(l*cos($3)):(l*sin($3)) with vectors, \
"" u 1:($2+dy):(l*cos($3)):(l*sin($3)) w vec, \
"" u 1:($2-dy):(l*cos($3)):(l*sin($3)) w vec, \
"" u ($1+dx):2:(l*cos($3)):(l*sin($3)) w vec, \
"" u ($1-dx):2:(l*cos($3)):(l*sin($3)) w vec, \
"" u ($1-dx):($2-dy):(l*cos($3)):(l*sin($3)) w vec, \
"" u ($1-dx):($2+dy):(l*cos($3)):(l*sin($3)) w vec, \
"" u ($1+dx):($2-dy):(l*cos($3)):(l*sin($3)) w vec, \
"" u ($1+dx):($2+dy):(l*cos($3)):(l*sin($3)) w vec
with the datafile:
1 3 0.3
2 3 0.6
3 3 0.9
you'll get the following plot:
http://www.nabble.com/file/p24391677/ts.gif ts.gif
a.g.s.maxwell wrote:
>
> This doesn't make the vector arrows wrap around. All the data points will
> be within range [0:3] and the vectors are pointing to the position at next
> time step, which is why I want the vector arrows to go out one boundary
> and in the other.
>
>
> Thomas Sefzick wrote:
>>
>> plot your data again with the yrange interval added to
>> or subtracted from the data:
>>
>> dy=3
>> set yrange [0:0+dy]
>> plot "datafile" using 1:2:(l*cos($3)):(l*sin($3)) with vectors, \
>> "" using 1:($2+dy):(l*cos($3)):(l*sin($3)) with vectors, \
>> "" using 1:($2-dy):(l*cos($3)):(l*sin($3)) with vectors
>>
>> to get the same color for all plots add 'linetype' options.
>>
>>
>> a.g.s.maxwell wrote:
>>>
>>> Is it possible to have periodic boundaries, so if the vector arrow goes
>>> out the top, it will come back in at the bottom of the graph at the same
>>> place at same angle?
>>>
>>>
>>> Thomas Sefzick wrote:
>>>>
>>>> l=1.
>>>> plot 'datafile' using 1:2:(l*cos($3)):(l*sin($3)) with vectors
>>>>
>>>> use 'l' to adjust the length of the vectors.
>>>>
>>>>
>>>> a.g.s.maxwell wrote:
>>>>>
>>>>> I have a data file with 3 columns (x,y,theta), and I have plotted a
>>>>> graph of the x and y positions. Now I need to draw an arrow from each
>>>>> (x,y) to (x+cos(theta),y+sin(theta)) which is easily done by typing in
>>>>> each point separately but I will need to do it for up to 1000 points,
>>>>> so can anyone help me with some code that will automatically assign an
>>>>> arrow to every point on the graph according to the directions above?
>>>>>
>>>>> Thanks
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>
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