I need to plot some data with DateTime type along the abscissa, and would like to have a nice formatting of the xtick argument.
Consider this example:
using Plots, Dates
#
function timeperiod(x::Float64)
Second(Int(floor(Second(Day(1)).value * x)))
end
#
today = DateTime(2010,10,19)
x = range(0,60,length=100)
tm = today+timeperiod.(x);
#
plot(tm,sin.(2pi*x/30))
which gives:
I’d like to indicate the time every week, so I try with:
tm_tick = range(tm[1],tm[end],step=Day(7))
#
plot(tm,sin.(2pi*x/28),xtick=tm_tick,xrot=60)
leading to:
As seen, this provides unnecessary time resolution (ms?) and the year “disappears”.
So I try with:
julia> Dates.format.(tm_tick,"yyyy-mm-dd")
5-element Array{String,1}:
"2010-10-19"
"2010-11-02"
"2010-11-16"
"2010-11-30"
"2010-12-14"
which would be an ok formatting. HOWEVER, if I try with:
plot(tm,sin.(2pi*x/28),xtick=Dates.format.(tm_tick,"yyyy-mm-dd"),xrot=60)
the plot is produced without xticks…
Question: How can I achieve the desired formatting of the xticks?
[I need to abscissa values `tm` to be of type `DateTime` and not `Date`, because I have much higher resolution than once a day. For my use, the `x` vector will not have equidistant elements.]
]