[R] wrong labels and colors of points in graph/plot

[David Winsemius]

No attachment came through the mailserver. Did you follow the  
directions in the posting guide regarding acceptable types of  
attachments? I also do not see any code that would let us reproduce an  
input process.

One method that might work is to offer the results of  
dput(coefficients) as text within your message.

-- 
David
On Jun 4, 2009, at 12:22 PM, Katharina May wrote:

> Hi there,
>
> I trying to solve this problem for the whole day not going anywhere,
> so I  really hope maybe somebody can help
> me in this community...
> I've got an object coefficient2 which I want to plot in differerent
> ways, with colors and labels added to the points,
> but somehow there seems to be a problem if a value is NA within the
> independent variable, resulting in false labels and false colors for
> the points.
>
> plot(coefficient2$intercept ~ coefficient2$average_height,
> main="intercepts ::: height", ylab="intercepts", xlab="average height
> per site [cm]", xlim=c(20,3020), ylim=c(-2,5), col=coefficient2$color)
> highlight(coefficient2$intercept ~ coefficient2$average_height,
> lbls=coefficient2$site_no,col="Red", cex = .6)
>
> plot(coefficient2$intercept ~ coefficient2$average_dbh,
> main="intercepts ::: dbh", ylab="intercepts", xlab="average dbh per
> site [mm]", xlim=c(-10,360), ylim=c(-2,5),col=coefficient2$color )
> highlight(coefficient2$intercept ~ coefficient2$average_dbh,
> lbls=coefficient2$site_no,col="Red", cex = .6
>
>
> If I create a temporary object for each plot excluding any NA values
> for the x axis variable, somehow all points are displayed and the
> labels are correct except for the color (I have e.g. no clue why some
> points are red which I do not define at all and no ones are yellow
> which I use several times).
>
> #create temp container for all coefficients with average heights for  
> plotting
> coef_avheight <- coefficient2[which(! 
> is.na(coefficient2$average_height)),]
> plot(coef_avheight$intercept ~ coef_avheight$average_height,
> main="intercepts ::: height", ylab="intercepts", xlab="average height
> per site [cm]", xlim=c(20,3020), ylim=c(-2,5),
> col=coef_avheight$color)
> highlight(coef_avheight$intercept ~ coef_avheight$average_height,
> lbls=coef_avheight$site_no,col="Red", cex = .6)
>
> #create temp container for all coefficients with average dbh for  
> plotting
> coef_avdbh<- coefficient2[which(!is.na(coefficient2$average_dbh)),]
> plot(coef_avdbh$intercept ~ coef_avdbh$average_dbh,  main="intercepts
> ::: dbh", ylab="intercepts", xlab="average dbh per site [mm]",
> xlim=c(-10,360), ylim=c(-2,5),col=coef_avdbh$color )
> highlight(coef_avdbh$intercept ~ coef_avdbh$average_dbh,
> lbls=coef_avdbh$site_no,col="Red", cex = .6)
>
>
> Maybe someone can explain me the color issue and the problem with the
> NA values which results in a wrong labeling and to few
> points being displayed? I'm new to R as you can guess and my code
> isn't really elegant but I really cannot get faults within it...
>
>
> Attached you can find the referred R object (coefficient2).
> highlight requires library(NCStats)...
>
> Thank you very, very much,
>
>                       Katharina
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT