Need specific points in xy graph

I have xy graph-similar I drow and I'd like to find points, marked with red, automaic(not by hand with cursor) For he right point y value (x=0) and for he left one x value (y=0) The input are two arrays.
..if anyone can help..
Attachments:
gr.JPG ‏17 KB

Well, I think easiest would be to convert the data to complex, search theta for the desired angles, then find the one with the largest R.
Attached is a quick attempt (LabVIEW 7.0). It seems to work with your data, but please verify the code. There are probably bugs.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
histeresis4.vi ‏212 KB

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