Nikoloz Sumbadze 2/5/2014

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Hi,

I have following issue:

On the demand branch, I have "household/Urban/cooking" branch where saturation rate is 100%. at the same time share of electricity consumption is 6% and energy intensity - 1075.51 kwh per household. Also, 636,000 is number of households in urban.

As I understand correctly calculations in leap must give me following result: 1075.51*0.06*636000= 41,041,461.6; however leap gave me the following number - 41,041,462.6736.

this is very small change but taking into account number of branches i am afraid that difference will be big. So, can anybody help me?

Charlie Heaps 2/5/2014
 

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Sorry for the problems.

Could you send me your data set so I can take a look at this? All LEAP calculations are done in double precision so rounding errors should be insignificant, so this may indicate a bug. Please email your data set to me (or one that illustrates the problem) at leap@sei-us.org. You can use the email button within LEAP to do this or simply back the area as a .leap file.

Thanks

Charlie

Charlie Heaps 2/5/2014
 

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Update - I can reproduce the problem. I will investigate further and report back as soon as i can.

Best,

Charlie

Nikoloz Sumbadze 2/5/2014
 

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Hi Charlie,

thank you very much for your prompt response

I will send you leap and data files.

Best,
Nikoloz

Charlie Heaps 2/5/2014
 

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Hi again Nikoloz,

This is rather embarrassing! I found that the results are in fact being stored in the database as single precision values: hence the rounding error. This is a change that must have been made fairly recently I think. I am going to change this now (its a fairly simple change) and will try to get an update out ASAP. Hopefully by the end of the day.

Charlie

Charlie Heaps 2/5/2014
 

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I just posted LEAP 2012.056. It should fix the rounding problem and also an issue that was causing charts to not draw properly (freeze-up of charts).

Sorry for the inconvenience.

Best,

Charlie

Nikoloz Sumbadze 2/5/2014
 

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thank you Charlie for your help.

Nikoloz