Ladybug analysis period problems

I have some questions regarding the analysis period in Ladybug. If I enter in the hours from 9-15 with a 4 (15min) time step the last item in the sunPositionInfo output displays 14:45. Does this mean that the 3pm vector isn't being calculated? Is this a bug or is this intended to work this way?

Thanks

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Permalink Reply by Mostapha Sadeghipour Roudsari on September 11, 2016 at 10:17am

Hi Paul,

I would say the best solution in this case is to use timeStep in both sunpath and sunlight hours. You can generate several sun positions for the single hour and use them instead of using two sun vectors.

Mostapha

Permalink Reply by Elzine Braasch on August 15, 2016 at 2:36pm

Hi Paul,

This is great! I had just come across this issue within ladybug when my colleague raised a question as to why the sun position is an hour off during our summer here in the southern hemisphere.

Mostapha, can I please request the option to edit whether or not we are in a daylight saving zone for these purposes?

Thanks again guys!

Permalink Reply by Mostapha Sadeghipour Roudsari on August 22, 2016 at 10:36am

Hi Elzine. It has been implemented and will be available in ladybugX.

Permalink Reply by Paul Wintour on September 5, 2017 at 12:21am

Hi Mostapha. Has this been implemented yet? I'm in the process of updating my scripts. Ladybug version 0.65 doesn't appear to have been updated based on this discussion.

When you say ladybugX do you mean Ladybug/Honeybee Plus? I've tried this but am getting an error.

Also I understand a lot of the Ladybug components have been moved into Honeybee Plus. If I use Ladybug/Honeybee Plus which components do I need to use to replace the 'SunlightHoursAnalysis' component found in the legacy Ladybug? I'm guessing I will need to use test points instead of geometry (mesh or brep) and that other users will need to install Radiance. Is there a benefit in using the Plus version if I am just using Ladybug and not Honeybee?

Permalink Reply by Mostapha Sadeghipour Roudsari on September 15, 2017 at 11:15am

Paul, I appreciate it if you can update this discussion based on our conversations offline.

Permalink Reply by Romain Guillot on October 24, 2016 at 9:17pm

It might be a bit too late now but having experienced the same problem, this little cluster helped to solve the issue. It uses Heliotrope and Julian day to feed Ladybug+Honeybee with the generated sun vectors.

For month or year analysis it only uses a timestep of 1 as too reduce computation time..