In a Matlab plot(x,y) having both negative and positive 'y' values, how to display the xtick labels at zero(0) line too

In the sample image, I would like to have xtick labels at 0 line too.

Answer 1

[Jos (10584)]

The word too implies showing the tick labels twice ... This just repositions the axis, which is what you're after, I think:

ah = subplot(2,1,1) ;
plot(rand(20,1), randn(20,1), 'bo' ) ;
set(ah,'XAxisLocation','origin')

[Anjana Krishnan]

Thanks. Actually, this serves the purpose. But now the xlabel also is shifted up. Is it possible to have the xlabel at the original position(down).

I am still curious to know if the xtick labels can be put at two x axes, if required.

[Jos (10584)]

If you just want to add a line at y=0, there are many easy options, for instance:

line(get(gca,'xlim'),[0 0])

or use a tool from the File Exchange, like my own gridxy: https://uk.mathworks.com/matlabcentral/fileexchange/9973-gridxy

gridxy([],0)

[Anjana Krishnan]

Thanks. Yes, just drawing a line at zero is easy(and I have already done that in the sample image), but having the xticks and corresponding labels at two places is what I was trying to implement

[Jos (10584)]

I have never seen that in any proper data graph. Why do you want to do that? To me, it seems that it will be confusing. You could add gridlines as an alternative, using grid on, for instance.