Hi
Is it possible that there is a problem with attaching data? Look what
search() tels you.
Regards
Petr
[EMAIL PROTECTED] napsal dne 15.01.2008 18:38:36:
>
> Hi everybody,
>
> Well, I really hoped that until now i know how to do a selection .....
but
> obviously i don't. So risking your laughing at me - here you go.
>
> I have a table with lots of vegetation data, and one column specifies in
which
> region the data is. There are only 2 regions, region 1 and region 3. I
want to
> select all data that belong to region 1 and after do some xtabs on it.
If i do
> everything correctly i thought that i will have only the data from
region one
> in my result .... it seems not. The uniqueID - is the location name that
has
> incorporated into it the region as well, cat3_name is the category name
and
> Total is the actual numeric data i am interested in tabulating. There
are few
> other columns but for my immediate purpose they are not of interest now.
>
> Code (and i hope it does not come scrambled):
> ----------------------
>
> > x3 <- read.csv("unique_veg_id.csv")
> ### columns in my data:
>
> > dimnames(x3)[[2]] [1] "LocatID" "Region" "Total" "LocID"
"UTMX"
> "UTMY" "Class" "cat3_name" "EventID" "day_sampl" "uniqueID" >
>
> x3_reg1 <- x3[x3$Region == "JELA_reg1",]> > ma1 <- ftable(xtabs(Total ~
> uniqueID + cat3_name, data=x3_reg1))> ma1
> cat3_name Anthropogenic Asteraceae - herb Bare ground Canopy tree Coarse
woody
> debris Cypress knees Emergent aquatic Epiphyte Floating aquatics Grasses
Herbs
> Ilex Midstory tree Palm Sapium sebiferum Sedge Shrub Terrestrial herb
Vine
> WateruniqueID
> JELA_reg1_1_2_6554_2007Oct24_Class1 0 0
> 0 0 0 0 25 0 !
> 0 5 0 0 0 0 0 55
0
> 10 0 0JELA_reg1_1_3_6985_2007Oct17_Class2 0
> 15 0 0 0 0 15
> 0 0 0 5 0 0 0 0
> 50 7 0 10 0.
> .
> .
> .
>
> JELA_reg3_8_1_8015_2007Nov08_Class1 0 0
> 0 0 0 0 0 0
> 0 0 0 0 0 0 0 0 0
> 0 0 0JELA_reg3_9_2_8216_2007Nov08_Class1 0
> 0 0 0 0 0 0
> 0 0 0 0 0 0 0 0
> 0 0 0 0 0>
>
> -----------------------
>
> As you see instead of having only the uniqueID locations that belong
only to
> region 1, i have all locations for both regions, 1 and 3. If i save on
disk
> x3_reg1 and after read in back with read.csv and do the same xtabs on
that i
> do have only the locations belonging to region 1. Do i really need this
extra
> step? What i am doing wrong in my selection?
>
> Thank you for your input,
>
> Monica
> _________________________________________________________________
>
>
> GLM_CPC_VideoChat_distantfamily_012008
> [[alternative HTML version deleted]]
>
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