[R] overlaying two graphs / plots /lines

[Bogdan Tanasa]

 Dear all,

Any suggestions on how I could overlay two or more graphs / plots / lines
that have different sizes and the x axes have different breakpoints.

One dataframe is : A :

on x axis : 1 , 7, 9, 20, etc ... (100 elements)
on y axis : 39, 91, 100, 3, etc ... (100 elements)


The other dataframe is : B :

on x axis : 10, 21, 67, 99, 200 etc .. (200 elements).
on y axis :  9, 0, 89, 1000, 90, 1001. ... (200 elements).

Thanks a lot,

Bogdan

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