Graph conditional on day of the week

Cylc Cylc Support
1

Hi there!

I have the following situation:

PID = """ 
      forecast[-P1D] => forecast
      # except on thursdays when nowcast[-P1D] => forecast
"""

How do I implement this condition?

Cheers!

2

Hi @gturek - try something like this - Hilary

[scheduler]
    allow implicit tasks = True
[scheduling]
    initial cycle point = 2025
    [[graph]]
        # on Wednesdays, run nowcast after previous forecast
        W-3T00 = "forecast[-P1D] => nowcast"
        # on Thursdays, run forecast after previous nowcast
        W-4T00 ="nowcast[-P1D] => forecast"
        # on the other days, run forecast after previous forecast
        T00 ! (W-4T00,W-3T00) = "forecast[-P1D] => forecast"

In 2025, 1 January was a Wednesday (nowcast day). Result (after cylc graph 20250101 20250110) :

foo
foo258×1159 55.1 KB

1 Like
3

Thanx Hilary, that’s a good starting point for me to experiment with. Cheers!