2D vector problem

Graph 2D Vectors

The important thing is the vector data is in the form {$ x\;y\;\Delta x\; \Delta y $} or in other words, the starting point and then the offset. This is not the way arrows work when entered with 'to.'

set xrange[-15:15]  
set yrange[-10:10]  
set xzeroaxis lt 8  
set yzeroaxis lt 8  
set ylabel "Y"
set zlabel "Z"
set view equal xy
set key samplen 4
set title "Problem Set 1.1"
set grid xtics ytics
$va<<EOD
0 0 2 3 
EOD
$vb<<EOD
0 0 -1 3 
EOD
$vc<<EOD
-1 3 2 3
EOD
$vd<<EOD
2 3 -1 3
EOD
$ve<<EOD
0 0 1 6
EOD
plot $va with vectors lt 6 lw 3 t 'A', \
         $vb with vectors lt 7 lw 3 t 'B', \
         $ve with vectors lt 5 lw 3 t 'A+B', \
         $vc with vectors nohead dt 3 lt 1 lw 1 t '', \
         $vd with vectors nohead dt 3 lt 1 lw 1 t ''

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