Sueli Rodrigues wrote:
Hi,
I'm studying the Michael J. Crawley book (Statistics An Introduction using
R)and I'm trying to reproduce one example (page 168) for plot a barplot
with error bars, but when I put the function I receive the following
message. Please, could someone told me what's wrong?
error.bars=function(yv,z,nn){xv=barplot(yv,ylim=c(0,(max(yv)+max(z))),names=nn,ylab=deparse(substitute(yv)))g=(max(xv)-min(xv))/50
for(i in
1:length(xv)){lines(c(xv[i],xv[i]),c(yv[i]+z[i],yv[i]-z[i]))lines(c(xv[i]-g,xv[i]+g),c(yv[i]+z[i],yv[i]+z[i]))lines(c(xv[i]-g,xv[i]+g),c(yv[i]-z[i],yv[i]-z[i]))}}
Erro: unexpected symbol in
"error.bars=function(yv,z,nn){xv=barplot(yv,ylim=c(0,(max(yv)+max(z))),names=nn,ylab=deparse(substitute(yv)))g"
Sueli Rodrigues
Eng. Agrônoma - UNESP
Mestranda - USP/ESALQ
PPG-Solos e Nutrição de Plantas
Fones (19)93442981
(19)33719762
This is the notorious "dynamite plot" which causes distorted
perceptions, has an arbitrary base, and other problems. See
http://biostat.mc.vanderbilt.edu/DynamitePlots for more
information.
Frank
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
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