[R] Creating a Hash from Data.Frame

[Gundala Viswanath]

Thanks so much Jim,
I owe you a million!

- Gundala Viswanath
Jakarta - Indonesia


On Mon, Jun 16, 2008 at 11:03 AM, jim holtman <jholtman at gmail.com> wrote:
> here is a way:
>
>> x <- read.table(textConnection("#GDS_ID GENE_NAME GENE_DESCRIPTION GENE_FUNCTION
> + 1007_s_at | DDR1 | discoidin domain receptor tyrosine kinase 1 |
> protein-coding
> + 1053_at | RFC2 | replication factor C (activator 1) 2, 40kDa | protein-coding
> + 117_at | HSPA6 | heat shock 70kDa protein 6 (HSP70B') |
> protein-coding"), sep="|",
> + strip.white=TRUE, quote='')   # you need strip.white on the call
>> closeAllConnections()
>> str(x)
> 'data.frame':   3 obs. of  4 variables:
>  $ V1: Factor w/ 3 levels "1007_s_at","1053_at",..: 1 2 3
>  $ V2: Factor w/ 3 levels "DDR1","HSPA6",..: 1 3 2
>  $ V3: Factor w/ 3 levels "discoidin domain receptor tyrosine kinase
> 1",..: 1 3 2
>  $ V4: Factor w/ 1 level "protein-coding": 1 1 1
>> x
>         V1    V2                                          V3             V4
> 1 1007_s_at  DDR1 discoidin domain receptor tyrosine kinase 1 protein-coding
> 2   1053_at  RFC2 replication factor C (activator 1) 2, 40kDa protein-coding
> 3    117_at HSPA6        heat shock 70kDa protein 6 (HSP70B') protein-coding
>> mydata <- character()
>> mydata[as.character(x$V2)] <- as.character(x$V3)
>> mydata["RFC2"]  #access the data
>                                         RFC2
> "replication factor C (activator 1) 2, 40kDa"
>>
>
> remember to add the 'strip.white=TRUE' on read.table
>
> On Sun, Jun 15, 2008 at 9:53 PM, Gundala Viswanath <gundalav at gmail.com> wrote:
>> Hi,
>>
>> I have the following data frame:
>>
>>> print(mydatframe)
>>
>> __DATAFRAME__
>>
>>   V1    V2 V3
>> 1 1007_s_at  DDR1  discoidin domain receptor tyrosine kinase 1
>> 2 1053_at  RFC2  replication factor C (activator 1) 2, 40kDa
>> 3 117_at  HSPA6  heat shock 70kDa protein 6 (HSP70B')
>>
>> __END__
>>
>> Is there a way to create a hash with
>> V2 as Key and V3 as its value?
>>
>> - Gundala Viswanath
>> Jakarta - Indonesia
>>
>> ______________________________________________
>> R-help at 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.
>>
>
>
>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem you are trying to solve?
>