Re: [R] Problem in installing and starting Rattle

2010-11-15 Thread Feng Mai

I also have the problem trying to start rattle

Windows 7 32-bit R 2.12.0

When I try library(rattle) I get an error message
The procedure entry point deflateSetHeader could not be located in the
dynamic link library zilb1.dll
I hit OK and it prompts me to install GTK+ again. I tried to uninstall GTK+
first and delete all related files as Dieter suggested but still wont work
:(

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Re: [R] Fetching data

2010-11-15 Thread Feng Mai

IMO it is not possible. The code behind aspx page queries data from a
database server and display it on the webpage.


Maithula Chandrashekhar wrote:
 
 Dear all R users, I am wondering is there any procedure exists on R to
 fetch
 data directly from http://www.ncdex.com/Market_Data/Spot_price.aspx; and
 save it in some time series object, without filling any field in that
 website.
 
 Can somebody point me whether it is possible?
 
 Thanks and regards,
 
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Re: [R] Problem in installing and starting Rattle

2010-11-15 Thread Feng Mai

Ok to follow up my post, I finally got rattle and RGtk2 to work. The trick is
when R prompts me to install Gtk2+ I still hit yes but after the download,
once the installation process starts I close the R Gui window. After Gtk2+
installation is complete I start R again and it worked. 
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Re: [R] as.matrix behaves weird

2010-11-14 Thread Feng Mai
ncol is not an argument for as.matrix()

Alexx Hardt mikrowelle1234 at gmx.de writes:

 
 Hi,
 can someone tell me why x is still a 2x1-matrix in the last step?


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Re: [R] sum in vector

2010-11-14 Thread Feng Mai

to be more general you can also use aggregate:

aggregate(price,list(market),sum)


Henrique Dallazuanna wrote:
 
 Try this:
 
  rowsum(price, market)
 
 On Sun, Nov 14, 2010 at 10:02 AM, lgpeco pavic.o...@gmail.com wrote:
 

 hy guys i have one question :)

 i have two vectors markets and price

 market - c(1, 5, 7, 9, 9, 6, 5, 4, 4, 3, 1, 2, 1)
 price - c(100, 20, 30, 10, 50, 23, 23, 33, 96, 6, 4, 38, 96)
 i would like sum prices: market 1: (100+4+96), market 2: (38),..., market
 9:
 (10+50)
 ao i would like get this result: (200, 38, ..., 60)
 and i don't wanna use while, for loops... is there any other function to
 sum
 these :)

 tnx for helping ;)
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 Henrique Dallazuanna
 Curitiba-Paraná-Brasil
 25° 25' 40 S 49° 16' 22 O
 
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