r - unable changing linetype ggplot2 -


i change color , line type in ggplot. using code:

 <- runif(84, 20, 80) a<-ts(a,start = 2009,frequency = 12) #a<-ts(result$`dataset1$summe`,start = 2009,frequency = 12) a3 <- zoo(a, order.by = as.date(yearmon(index(a)))) p1 <- autoplot(a3) p1 + scale_x_date(labels = date_format("%m/%y"),breaks = date_breaks("2 months"), limits = as.date(c('2009-01-01','2017-08-01')))+ theme(axis.text.x = element_text(angle = 90))+ theme(axis.text.x = element_text(angle = 90))+   labs(x = "date",y="test") + theme(panel.background = element_rect(fill = 'white', colour = 'black'))+geom_line(linetype="dotted", color="red")

but color changed. should change line type?

autoplot() pick sensible default object it's passed. if want customize appearance it's better use standard ggplot() function.
able zoo object should passed trough fortify():

ggplot(fortify(a3, melt = true)) +     geom_line(aes(x = index, y = value), linetype='dashed', color="red") +     scale_x_date(labels = date_format("%m/%y"),                  breaks = date_breaks("2 months"),                   limits = as.date(c('2009-01-01','2017-08-01')))+      theme(axis.text.x = element_text(angle = 90),            axis.text.x = element_text(angle = 90),           panel.background = element_rect(fill = 'white', colour = 'black'))+     labs(x = "date",y="test")

enter image description here

(nb: dashed line @ top caused panel.background theme option)


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