r - plot cpt.var: Use values from dataframe for axis -


when try plot result changepoint analysis using cpt.var changepoint package, resulting values on x-axis integers starting 0 instead of values dataframe (which integers combining year , week). when plot data data frame x-axis correct, when plotting result of cpt.var x-values gone

i have searched online answers cannot find solution. hope can me out.

the syntax more complex example below comes down same issue: plotting the dataframe using plot(df, type="l") returns correct values on x-axis, plotting result of changepoint analysis using plot(vvalue) not.

library(changepoint) df <- read.table(header=true,text =                     "year_week n  200801 12 200802 5 200803 0 200804 6 200805 0 200806 0 200807 4 200808 5 200809 3 200810 25 200811 36 200812 5 200813 2           ")  vvalue <- cpt.var(df$n, method = "pelt", penalty = "bic") plot(vvalue) 

plot(vvalue, xaxt = "n") axis(1, at=1:13, labels=df[,1])

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