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Add horizontal and vertical lines

How many times have you done something like this? % BEGIN draw a horizontal line xMin = 0; xMax = 10; % the current extents of the x axis yVal = 12; hold on plot([xMin xMax], [yVal, yVal]) hold off % END draw a horizontal line Hline and Vline are simple but useful tools that draw a horizontal line at the given Y value from the left most extent of the axes to the right most. There is a similar command for vertical lines. You can replace the above with: hline(yVal) and be done with it.
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