Hi list

Maybe someone can help with the following problem (thanks in advance):

In a function I have a plot and want to add symbols/text only when

indicated by a logical vector (which was generated by the function

before, not manually like in the following example):

plot(1:10, 1:10)

lv <- c(T,T,T,F,F,F,T,T,T,F)

text(1:10, 1:10, '*', pos = 3)

In this example the asterisk is plotted at every yx-coordinate

indicated. How Can I make it appear only when 'TRUE' in the lv?

Another (statistical) question:

Actually this function generates significance levels to the plot at 10

time points of a time series by comparing the values at the single

time points by a t-test. I know this is probably not the correct way

to compare the whole series, but I have to do it this way

('constraints'). The question is: do I have to adjust for multiple

testing by e.g. Bonferroni correction?

--

Armin Goralczyk, M.D.

--

Universitätsmedizin Göttingen

Abteilung Allgemein- und Viszeralchirurgie

Rudolf-Koch-Str. 40

39099 Göttingen

--

Dept. of General Surgery

University of Göttingen

Göttingen, Germany

--

http://www.gwdg.de/~agoralc______________________________________________

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