[R] Separate Array Variable Content

[David Winsemius]

Many, many blank lines deleted.

On Jun 1, 2012, at 2:53 AM, Akkara, Antony (GE Energy, Non-GE) wrote:

> Hi iLai,
>
> What you showed below, almost same like I am also expecting.
>
> There is two matrix,
>
>                1) 1st - matrix contain values like this,
>
>                                ABC       XYZ     PQR       ABC_CHECK
> XYZ_CHECK       PQR_CHECK
>                                ----         ----     ----
> ----------------      --------------       -----------------
>                                 10          20         30
>                                40          50         60
>                                70          80         90
>
>                2)2nd matrix have some conditions, need to check with
> 1st matrix columns. Like this,
>
>                                CHECK FOR
> CONDITION
>                                --------------
> -----------------
>                                ABC_CHECK
> ABC > 10 & XYZ < 30 & PQR <90
>
>                                XYZ_CHECK
> ABC > 9 & XYZ < 25 & PQR <60
>
>                                PQR_CHECK
> ABC > 60 & XYZ < 79 & PQR <100
>
>
> Here I need to change the cell content that already created
> ["ABC_CHECK"," XYZ_CHECK"," PQR_CHECK"]
>
> So,
>                Finally the result should get like this,
>
>                                ABC       XYZ     PQR       ABC_CHECK
> XYZ_CHECK       PQR_CHECK
>                                ----         ----     ----
> ----------------      --------------       -----------------
>                                 10          20         30
> FALSE                    TRUE                     FALSE
>                                40          50         60
> FALSE                    FALSE                    FALSE
>                                70          80         90
> FALSE                    FALSE                    TRUE
>
> And can please tell me which is the best way to do this ?, Can we do
> this with-out loop ?
>
> And, Is it possible to put any other character instead of TRUE & FALSE
> ?, like this
>
> Here
>
> For TRUE = T , FLASE = F
>                                ABC       XYZ     PQR       ABC_CHECK
> XYZ_CHECK       PQR_CHECK
>
>                                ----         ----     ----
> ----------------      --------------       -----------------
>                                 10          20         30
> F                              T                              F
>                                40          50          
> 60              F
> F                              F
>                                 70          80          
> 90              F
> F                              T
>
>
> Can I get an immediate reply ?

I would like to ask why you think you deserve an "immediate reply"?  
You are posting data structures in a completely ambiguous manner. Had  
you instead posted the names of these structures and the output of  
dput() on each of them there might have be a basis for immediate  
response. As it is I see no reason to try to guess what class these  
items might be after reconstruction from the mail-client-mangled  
output you offered.

-- 
David.
>
> - Thanks
>
> Antony.
>
> From: ilaik9 at gmail.com [mailto:ilaik9 at gmail.com] On Behalf Of ilai
> Sent: Wednesday, May 30, 2012 10:35 PM
> To: Akkara, Antony (GE Energy, Non-GE)
> Cc: r-help at r-project.org
> Subject: Re: [R] Separate Array Variable Content
>
> If you haven't done so you *must* read an Introduction to R. The only
> reason this is a problem is Myarray is a character string, not a
> function or expression to be evaluated. I think this will get you what
> you want though:
>
> # In the future use the output of ?dput to provide data to this list
> (MyMatrix <- structure(c(10, 20, 30, 40, 50, 60, 70, 80, 90), .Dim =
> c(3L,
> 3L), .Dimnames = list(NULL, c("ABC", "PQR", "XYZ"))))
>
> # DO NOT use rich font !!! in plain text it adds '*' to the bold names
> which is more than annoying...
> MyArray <-  c("ABC>50","PQR<50","ABC<30 & XYZ<40")
>
> # finally the answer:
> sapply(MyArray,function(x)  
> eval(parse(text=x),as.data.frame(MyMatrix)))
>
> HTH
>
> On Wed, May 30, 2012 at 12:44 AM, Rantony <antony.akkara at ge.com>  
> wrote:
>
> Hi,
>
> I am new in R,
>
> i have a matrix like this
>
> MyMatrix <-
> *ABC   PQR    XYZ*
> 10       20        30
> 40       50        60
> 70       80        90
>
> And, i have an array containing some conditions like this,
> MyArray <-  c("*ABC*>50","*PQR*<50","*ABC*<30 &* XYZ*<40")
>
> "ABC>50"
> "PQR<50"
> "ABC<30 & XYZ<40"
>
> My purpose what is, i need to check this conditions in *MyArray* with
> *MyMatrix* value for particular column
>
> How it is possible ?
>
> - Thanks

David Winsemius, MD
West Hartford, CT