[Radiance-general] Radiance 5.0 installation on ubuntu 14.04

[Greg Ward]

You can achieve the same result as averaging output by repeating the points on your input and adding a corresponding -c N for rcontrib.

If you already have the matrices, though, you can average them using rmtxop.  Let's say you have 3 matrices, you can use:

	rmtxop -s .33333 res1.mtx + -s .33333 res2.mtx + -s .33333 res3.mtx > avg.mtx

Note that you would use a different scaling factor for more or fewer matrices.

Cheers,
-Greg

> From: Humberto Antunes <hs.antunes at campus.fct.unl.pt>
> Subject: Re: [Radiance-general] Radiance 5.0 installation on ubuntu 14.04
> Date: March 20, 2016 2:36:12 PM PDT
> 
> I analyzed the data more carefully and the difference is not that big, I'm going to follow your advice and I'm going to create a script to run the simulation N times until the average of the final value starts to converge, this way i think I will get a very accurate value, do you think this is a good idea?
> 
> Best regards
> Humberto A.
> 
> 2016-03-20 1:30 GMT+00:00 Greg Ward <gregoryjward at gmail.com>:
> Well, Radiance is a Monte Carlo simulation, which by default initializes to a new point each time.  You can average together your results for greater accuracy, but how much difference are you seeing?
> 
> Cheers,
> -Greg
> 
>> From: Humberto Antunes <hs.antunes at campus.fct.unl.pt>
>> Subject: Re: [Radiance-general] Radiance 5.0 installation on ubuntu 14.04
>> Date: March 19, 2016 1:47:06 PM PDT
>> 
>> Ok I get it now, you can't imagine how helpful all that info had been.
>> 
>> I had been running some tests and i saw something that is quite strange, when i am creating my view matrix i use the following command "rfluxmtx -I+ -ab 12 -ad 50000 -lw 2e-5 -y 6 - < data/photocells.pts objects/window.rad materials/testroom.mat objects/testroom.rad > results/photocells.vmx", if I run the this command several times the output is always different, without changing anything in the files or in the command, and this ends up creating different work plane illuminances, do you have any idea on what is causing this to happen?
>> 
>> Best regards
>> Humberto A.
>> 
> 
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