R help - Apr 2009 - Accessing all the first sub-elements of a list of list

Hello,

 

The 179th and 180th elements of my list of lists look like this:

 

[[179]]

[[179]]$desc

[1] ">ipi|IPI00646510|IPI00646510.2 ISOFORM P60-HCK OF TYROSINE-PROTEIN
KINASE HCK."

 

[[179]]$seq

[1]
"MGGRSSCEDPGCPRDEERAPRMGCMKSKFLQVGGNTFSKTETSASPHCPVYVPDPTSTIKPGPNSHNSNTP
GIREAGSEDIIVVALYDYEAIHHEDLSFQKGDQMVVLEESGEWWKARSLATRKEGYIPSNYVARVDSLETEE
WFFKGISRKDAERQLLAPGNMLGSFMIRDSETTKGSYSLSVRDYDPRQGDTVKHYKIRTLDNGGFYISPRST
FSTLQELVDHYKKGNDGLCQKLSVPCMSSKPQKPWEKDAWEIPRESLKLEKKLGAGQFGEVWMATYNKHTKV
AVKTMKPGSMSVEAFLAEANVMKTLQHDKLVKLHAVVTKEPIYIITEFMAKGSLLDFLKSDEGSKQPLPKLI
DFSAQIAEGMAFIEQRNYIHRDLRAANILVSASLVCKIADFGLARVIEDNEYTAREGAKFPIKWTAPEAINF
GSFTIKSDVWSFGILLMEIVTYGRIPYPGMSNPEVIRALERGYRMPRPENCPEELYNIMMRCWKNRPEERPT
FEYIQSVLDDFYTATESQYQQQP"

 

[[179]][[3]]

[1] 26

 

 

[[180]]

[[180]]$desc

[1] ">ipi|IPI00651745|IPI00651745.5 ISOFORM 2 OF TOM1-LIKE PROTEIN
2."

 

[[180]]$seq

[1]
"MEFLLGNPFSTPVGQCLEKATDGSLQSEDWTLNMEICDIINETEEGPKDAIRALKKRLNGNRNYREVMLAL
TAWADAFRSSPDLTGVVHIYEELKRKGVEFPMADLDALSPIHTPQRSVPEVDPAATMPRSQSQQRTSAGSYS
SPPPAPYSAPQAPALSVTGPITANSEQIARLRSELDVVRGNTKVMSEMLTEMVPGQEDSSDLELLQELNRTC
RAMQQRIVELISRVSNEEVTEELLHVNDDLNNVFLRYERFERYRSGRSVQNASNGVLNEVTEDNLIDLGPGS
PAVVSPMVGNTAPPSSLSSQLAGLDLGTESVSGTLSSLQQCNPRDGFDMFAQTRGNSLAEQRKTVTYEDPQA
VGGLASALDNRKQSSEGIPVAQPSVMDDIEVWLRTDLKGDDLEEGVTSEEFDKFLEERAKAAEMVPDLPSPP
MEAPAPASNPSGRKKPERSEDALFAL"

 

[[180]][[3]]

[1] 16

 

I would like to be able to access all the first sub-elements ($desc) of
my list in order to be able to test for the presence of some elements
using their desc (description).

 

Something like lapply(mylist, fun='$desc') doesn't work. For loops
could
do but are they the best thing I can do ?

 

Thanks a lot for your help !

 

Amelie




-- 
 The Wellcome Trust Sanger Institute is operated by Genome Research 

 Limited, a charity registered in England with number 1021457 and a 
 compa
ny registered in England with number 2742969, whose registered 
 office is 2
15 Euston Road, London, NW1 2BE. 



	[[alternative HTML version deleted]]

Try this:

lapply(l, '[', 'desc')

On Thu, Apr 23, 2009 at 8:13 AM, Amelia Baud <ab19@sanger.ac.uk> wrote:
> Hello,
>
>
>
> The 179th and 180th elements of my list of lists look like this:
>
>
>
> [[179]]
>
> [[179]]$desc
>
> [1] ">ipi|IPI00646510|IPI00646510.2 ISOFORM P60-HCK OF
TYROSINE-PROTEIN
> KINASE HCK."
>
>
>
> [[179]]$seq
>
> [1]
>
"MGGRSSCEDPGCPRDEERAPRMGCMKSKFLQVGGNTFSKTETSASPHCPVYVPDPTSTIKPGPNSHNSNTP
> GIREAGSEDIIVVALYDYEAIHHEDLSFQKGDQMVVLEESGEWWKARSLATRKEGYIPSNYVARVDSLETEE
> WFFKGISRKDAERQLLAPGNMLGSFMIRDSETTKGSYSLSVRDYDPRQGDTVKHYKIRTLDNGGFYISPRST
> FSTLQELVDHYKKGNDGLCQKLSVPCMSSKPQKPWEKDAWEIPRESLKLEKKLGAGQFGEVWMATYNKHTKV
> AVKTMKPGSMSVEAFLAEANVMKTLQHDKLVKLHAVVTKEPIYIITEFMAKGSLLDFLKSDEGSKQPLPKLI
> DFSAQIAEGMAFIEQRNYIHRDLRAANILVSASLVCKIADFGLARVIEDNEYTAREGAKFPIKWTAPEAINF
> GSFTIKSDVWSFGILLMEIVTYGRIPYPGMSNPEVIRALERGYRMPRPENCPEELYNIMMRCWKNRPEERPT
> FEYIQSVLDDFYTATESQYQQQP"
>
>
>
> [[179]][[3]]
>
> [1] 26
>
>
>
>
>
> [[180]]
>
> [[180]]$desc
>
> [1] ">ipi|IPI00651745|IPI00651745.5 ISOFORM 2 OF TOM1-LIKE PROTEIN
2."
>
>
>
> [[180]]$seq
>
> [1]
>
"MEFLLGNPFSTPVGQCLEKATDGSLQSEDWTLNMEICDIINETEEGPKDAIRALKKRLNGNRNYREVMLAL
> TAWADAFRSSPDLTGVVHIYEELKRKGVEFPMADLDALSPIHTPQRSVPEVDPAATMPRSQSQQRTSAGSYS
> SPPPAPYSAPQAPALSVTGPITANSEQIARLRSELDVVRGNTKVMSEMLTEMVPGQEDSSDLELLQELNRTC
> RAMQQRIVELISRVSNEEVTEELLHVNDDLNNVFLRYERFERYRSGRSVQNASNGVLNEVTEDNLIDLGPGS
> PAVVSPMVGNTAPPSSLSSQLAGLDLGTESVSGTLSSLQQCNPRDGFDMFAQTRGNSLAEQRKTVTYEDPQA
> VGGLASALDNRKQSSEGIPVAQPSVMDDIEVWLRTDLKGDDLEEGVTSEEFDKFLEERAKAAEMVPDLPSPP
> MEAPAPASNPSGRKKPERSEDALFAL"
>
>
>
> [[180]][[3]]
>
> [1] 16
>
>
>
> I would like to be able to access all the first sub-elements ($desc) of
> my list in order to be able to test for the presence of some elements
> using their desc (description).
>
>
>
> Something like lapply(mylist, fun='$desc') doesn't work. For
loops could
> do but are they the best thing I can do ?
>
>
>
> Thanks a lot for your help !
>
>
>
> Amelie
>
>
>
>
> --
>  The Wellcome Trust Sanger Institute is operated by Genome Research
>
>  Limited, a charity registered in England with number 1021457 and a
>  compa
> ny registered in England with number 2742969, whose registered
>  office is 2
> 15 Euston Road, London, NW1 2BE.
>
>
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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