[Radiance-general] gendaymtx returns -1.#J -1.#J -1.#J

[Mostapha Sadeghipour]

Hi Greg,

Thank you for checking. My bad! I use my own written epw2wea convertor so
the user don't need to download epw2wea file separately. That was a bug
indeed. Sorry about that.

One more question about conversion of the results of gendaymtx. Where can I
find  solid angle subtended for each patch of Reinhart sky? I already have
the values for Tregenza sky as (0.0435, 0.0416, 0.0474, 0.0407, 0.0429,
0.0445, 0.0455, 0.0344) for the 8 rows. Is it fine to use the same numbers
for every two rows?

Thanks again,
Mostapha




On Thu, Oct 3, 2013 at 12:21 PM, Gregory J. Ward <gregoryjward at gmail.com>wrote:

> Hi Mostapha,
>
> Thanks for sending your files.  For some reason, your WEA file has the
> month and day columns swapped, which is the source of your error.  What did
> you use to translate the EPW file?  The latest HEAD includes Christoph
> Reinharts epw2wea program, which does the correct translation.  With the
> correct input, gendaymtx seems to produce appropriate output.
>
> Best,
> -Greg
>
> *From: *Greg Ward <gward at lmi.net>
>
> *Date: *October 3, 2013 8:37:15 AM PDT
>
> *
> *
>
> Hi Mostapha,
>
> This sounds like a bug in gendaymtx.  Some versions of the standard
> library print out "-1.#J" for NaN (Not a Number), which can result from a
> divide-by-zero or similar illegal math operation.  If you send me your
> weather file in a separate message (not to the mailing list), I will see if
> I can reproduce the problem.  There may be a corner case or two that
> gendaymtx still doesn't deal with gracefully.
>
> Cheers,
> -Greg
>
> *From: *Mostapha Sadeghipour <sadeghipour at gmail.com>
>
> *Date: *October 2, 2013 1:37:49 PM PDT
>
> *
> *
>
> Hi all,
>
> I tried to read the results of the gendaymtx with a custom script and I
> noticed that there are multiple values of  -1.#J -1.#J -1.#J for RGB. Does
> anybody know why this is happening?
>
> I'm trying to get the total solar radiation for sky patches (-O1). I'm
> running RADIANCE on Windows and here is the line:
>
> gendaymtx -m 1 -O1 .\USA_AK_Anchorage.Intl.AP.702730_TMY3.wea>
> .\USA_AK_Anchorage.Intl.AP.702730_TMY3.mtx
>
> Thanks in advance,
> Mostapha
>
>
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