[R] Fit Gompertz' curve'

[Silvano]

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)

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="Média de Gases", xlab="Tempo (h)",
                 trace.label="Doses")

Thanks,

--------------------------------------
Silvano Cesar da Costa
Departamento de Estatística
Universidade Estadual de Londrina
Fone: 3371-4346
--------------------------------------