Grid line for x=0 and y=0

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Dennis
Dennis 2014-3-18
回答： Dennis 2014-3-18
Hello! Let us say we have a ordinary graph with x and y axes: I want to have one grid line at x=0 and one at y=0. That would make it much easier to read where a graph is negativ or positive. Couldnt find such possibility here.
Thanks in advance for helping out :-)
Regards Dennis

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回答（3 个）

Jos (10584)
Jos (10584) 2014-3-18
Take a look at GRIDXY, available on the File Exchange:
http://www.mathworks.com/matlabcentral/fileexchange/9973-gridxy-v2-2-feb-2008
gridxy(0,0)
would yield exactly what you want. And you can even play with the line-styles
Dennis
Dennis 2014-3-18
That would be exactly what I need! Unfortunately I get the message "Undefined function 'GRIDXY'" which is the same for "XYREFLINE" (I red that this was the command earlier). Do I maybe miss an add-on?
The version Ive installed: R2013b (8.2.0.701)
Dennis
Dennis 2014-3-18
Thanks for your answer, but I dont manage to use your way to plot my function. GRIDXY would be fantastic to use, but as I said, maybe I am missing a system tool or something, because I got the message that GRIDXY is an undefined function.

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