Fit Gompertz' curve'
Hi:
On Tue, Aug 16, 2011 at 7:07 AM, Silvano <silvano at uel.br> wrote:
Hi, I build a graph taking into account the times: 1, 2,4,6,8,10,12,15,18,21,24,28,32 and 48. Be that the scale of the X axis does not look right. It seems equidistant. (graph attached)
(a) No graph came through. See the Posting Guide for details of what types of attachments will pass to the list. (b) Is Tempo numeric or factor? Try str(mydataframename) to find out the classes of each variable in your data frame. If they seem equidistant, it's a plausible null hypothesis that Tempo is a factor. If so, change it to numeric; one way to do this is mydataframe$tempo <- as.numeric(as.character(mydataframe$Tempo)) I used a different variable name so that you can double check whether the conversion is correct. Also run str() on the modified data to make sure that the new variable is numeric. HTH, Dennis
What changes have I to do in the following commands so that the scale be
correct?
interaction.plot(Tempo, Trat, Valor, ylim=c(0, 2), las=1,
? ? ? ? ? ? ? ?lty=c(1,2,3,4), lwd=3, bty='l',
? ? ? ? ? ? ? ?col=c('red','blue','magenta','green'),
? ? ? ? ? ? ? ?ylab="M?dia de Gases", xlab="Tempo (h)",
? ? ? ? ? ? ? ?trace.label="Doses")
Thanks,
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Silvano Cesar da Costa
Departamento de Estat?stica
Universidade Estadual de Londrina
Fone: 3371-4346
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