Line Graph algorithm

Hi all,

Does anyone know of any kind of algorithm that generates XY co-ordinates of a graph. I need this algorithm to scale automatically ie any values a user submits the graph must scale according, (ex (12 44,23,) or (3250,1311,5243) .... both values should fit in the graph)

If my post is not understood I'll elaborate on it.


Thanks,

Brad

Quote:

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Originally Posted by Brad Davids

Hi all,

Does anyone know of any kind of algorithm that generates XY co-ordinates of a graph. I need this algorithm to scale automatically ie any values a user submits the graph must scale according, (ex (12 44,23,) or (3250,1311,5243) .... both values should fit in the graph)

If my post is not understood I'll elaborate on it.


Thanks,

Brad

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Hi, welcome to the forum.

Whenever you add new points to the graph you just check they fall inside the boundaries, i.e. for each new pair (x,y) you check if
xmin <= x <= xmax AND ymin <= y <= ymax

If this is true you plot the point. If not, you assign new values to the boundaries, for example, if ymin> y then redefine ymin = y. Finally you redeine the scale according to the new boundary values and replot all the points.