I am trying trying to plot a chart thar always have values from 01/01 of
the beginning of the year till 31/12 of the end of the year.
The thing is sometimes I will have NA or not values in one time series but
not in the others. In the next code you can see two variables b (with a
length of 138 of the current year) and b2019 (of the previous year) but I
want to plot both b and b2019 in one chart with the X-axis from 01/01 to
31/12 without specifying the year.