Read my answers below.

nikos ioannidis a écrit :
> The N50 value is about contigs>=500.
>
>
> Another question,
> I have made a similar question again
> but I want to be sure
> I assembled the rhodobacter 2.4.1
> with AllpathsLg
> and Ray -k 31 -p (the following libraries)
> using the following libraries:
>
> as fragment lib:
> http://www.ebi.ac.uk/ena/data/view/SRX000946
>
> and jumping libs :
> http://www.ebi.ac.uk/ena/data/view/SRX016062
> http://www.ebi.ac.uk/ena/data/view/SRX016063
>
> but I get totally diferrent results for example
> for Ray:
> N50 for Contigs>= 100 nt   4.579
> N50 for  Contigs>= 500 nt  5.611
> N50 for Scaffolds>= 100 nt 4.931
> N50 for Scaffolds>= 100 nt 5.993
>
> and AllPathsLg
> N50 contigs 240.400
> N50 scaffolds 2.956.000
>
> 1) isn't it strange that the
> N50 for Contigs>= 100 nt is bigger than
> N50 for  Contigs>= 500 nt ?
> (The same for scaffolds)

In your numbers above it is not the case.

>
>
> 2) because i use jumping libraries
>    should I use them differently in Ray
> or process them with a tool?

You have to remove adapters unrelated to your sample.

>
> 3)Generally using jumping libraries
> should I handle them differently, or reverse them?

I downloaded the EBI data to try it.


> Thank you.
>
> On Mon, Jun 4, 2012 at 5:28 PM, nikos ioannidis<niioa...@gmail.com>  wrote:
>> Hello,
>>
>>
>> i want to ask if i run twice the Ray is it normal to take slightly different 
>> results?
>> Also when i use more cpus the time shouldn't reduce? or depents?
>> And another one, when i use more cpus this affects my results?
>> for example using 224 cpus for e.coli i get N50=80011
>> and if i use 64 cpus i get N50=68137, is normal to have a value +- 10K??
>>
>>
>> Thank you.
>>
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