I tried to draw the following diagram in LaTeX
I reference the method from here:
I can successfully compile the code from above link, but when I attempted to draw more lines between A and B by modifying the number in the:
\draw[shorten <=-1cm,shorten >=-1cm,-latex] (m-4-2.south west)--(m-4-2.south east); \draw[shorten <=-1cm,shorten >=-1cm,-latex] (m-7-2.south east)--(m-7-2.south west);
I always got the error message said:
Package pgf Error: No shape named m-5-2 is known.
Any solution for this problem? Thanks.