[R-sig-Geo] plotting Football field ball pattern data

[Roger Bivand]

On Fri, 30 Jan 2009, srinivasa raghavan wrote:

> Hi r-sig-geo team,
>
> I am a new user of R 2.8.1 in windows 2003. I have a data set of football
> ball pattern data. The data is for multiple matches. The variables are :
>
> match: The code number of the match.
> period: First half or second half denotted by 1 or 2.
> pitchX:  The x co-ordinate of the field.
> pitchy: The y-co-ordinate of the field.
> seconds: The time point.
>
> I am interested to draw the football graph/diagram and then plot the above
> data.

What is a "football graph/diagram"? Is it a line joining the (x,y) in time 
sequence? Simplifying by choosing one period in one match:

o <- order(seconds)
plot(pitchX[o], pitchY[o], type="l", asp=1)

should do that, but I don't know whether this is what you need? If you 
need more detail on the trajectory, see the trip package (which is for 
animal tracking data, not dissimilar in principle).

Roger

>
> Can any one let me know the right functions/packages which can help me in
> this regard.
>
> thanks in advance.
>
> warm regards,
> srinivas
> statistical analyst.
>
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>
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no