Would you please help me in drawing two circles with a line (middle arrow) connecting them.
O-->--O
Sorry I could not post the image.
Edit* Thank you so much.
Can you help me more? Here is my code. I need to draw that mid-arrowed line between the dot-filled circles.
Thank you
\begin{tikzpicture}
\draw [dotted] (0,1) -- (0,10);
\draw [dotted] (1.5,1.3) -- (1.5,10);
\draw [dotted] (3.0,1.3) -- (3.0,10);
\draw [dotted] (4.5,1.3) -- (4.5,10);
\draw [dotted] (6.0,1.3) -- (6.0,10);
\draw [dotted] (7.5,1.3) -- (7.5,10);
% Lower Row
\filldraw[pattern=dots] (7.5,1) circle (0.2) ;
\filldraw[pattern=dots] (6.0,1) circle (0.2);
\filldraw[pattern=dots] (4.5,1) circle (0.2);
\draw (3.0,1) circle (0.2);
\end{tikzpicture}
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function.arrows
library gives youo-o
.