On 29-Sep-09 16:03:31, mau...@alice.it wrote:
> Through converting a miRNAs file from FASTA to character format I get
> a vector which looks like the following:
>
>> nml
> [1] "hsa-let-7a MIMAT0000062 Homo sapiens let-7a"
> [2] "hsa-let-7b MIMAT0000063 Homo sapiens let-7b"
> [3] "hsa-let-7c MIMAT0000064 Homo sapiens let-7c"
> [4] "hsa-let-7d MIMAT0000065 Homo sapiens let-7d"
> [5] "hsa-let-7e MIMAT0000066 Homo sapiens let-7e"
> [6] "hsa-let-7f MIMAT0000067 Homo sapiens let-7f"
> [7] "hsa-miR-15a MIMAT0000068 Homo sapiens miR-15a"
> [8] "hsa-miR-16 MIMAT0000069 Homo sapiens miR-16"
> [9] "hsa-miR-17 MIMAT0000070 Homo sapiens miR-17"
> [10] "hsa-miR-18a MIMAT0000072 Homo sapiens miR-18a"
>
> ........................................................................
> ...............................
> [888] "hsa-miR-675* MIMAT0006790 Homo sapiens miR-675*"
> [889] "hsa-miR-888* MIMAT0004917 Homo sapiens miR-888*"
> [890] "hsa-miR-541* MIMAT0004919 Homo sapiens miR-541*"
>
>
> My goal is to separate into a vector only the first string preceding
> the 1st space starting from the left.
> With reference to the records above listed I would obtain:
> [1] "hsa-let-7a"
> [2] "hsa-let-7b"
> [3] "hsa-let-7c"
> [4] "hsa-let-7d"
> [5] "hsa-let-7e"
> [6] "hsa-let-7f f"
> [7] "hsa-miR-15a"
> [8] "hsa-miR-16"
> [9] "hsa-miR-17"
> [10] "hsa-miR-18a"
>
> ........................................................................
> ...............................
> [888] "hsa-miR-675*"
> [889] "hsa-miR-888*"
> [890] "hsa-miR-541*"
> [...]
Hi Maura,
Example:
Strings<-c(
"hsa-let-7a MIMAT0000062 Homo sapiens let-7a",
"hsa-let-7b MIMAT0000063 Homo sapiens let-7b",
"hsa-let-7c MIMAT0000064 Homo sapiens let-7c")
sub(" .*","",Strings)
# [1] "hsa-let-7a" "hsa-let-7b" "hsa-let-7c"
Ted.
--------------------------------------------------------------------
E-Mail: (Ted Harding) <ted.hard...@manchester.ac.uk>
Fax-to-email: +44 (0)870 094 0861
Date: 29-Sep-09 Time: 17:25:00
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