How to label x axis with the dates?

[inj...@gmail.com]

Hi!

> How to label x axis with the dates?
I've tried to customize plot() parameters but this is full stuck of errors, that can be imagined (((
Please help!

[Kay Brodersen]

Hi injamed@,

The plot() function adds an appropriate x-axis automatically if your input data is a time series.

Based on the example in the documentation, simply replace:

  data <- cbind(y, x1)

  pre.period <- c(1, 70)

  post.period <- c(71, 100)

by something like:

  time.points <- seq.Date(as.Date("2014-01-01"), by = 1, length.out = 100)

  data <- zoo(cbind(y, x1), time.points)

  pre.period <- time.points[c(1, 70)]

  post.period <- time.points[c(71, 100)]

to obtain:

  impact <- CausalImpact(data, pre.period, post.period)

  plot(impact)

Kay

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[Kay Brodersen]

As a follow-up, the package documentation now also contains this example.