[R] barplot: different colors for the bar and the strips

2006-09-07 Thread Hao Chen
Hi,

I am using barplot and would like to know if it is possible to have bars
filled with one color while use a different color for the shading lines. 

The following code colors the shading lines, leaving the bars in white:

 barplot(1:5, col=c(1:5), density=c(1:5)*5)

while the colors are applied to the bars when density is removed.

 barplot(1:5, col=c(1:5))

I did check ?barplot and found the following: 

col: a vector of colors for the bars or bar components. 
 
 Thanks,

 Hao
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Re: [R] barplot: different colors for the bar and the strips

2006-09-07 Thread Hao Chen
Hello Marc Schwartz

On Thu, Sep 07, 2006 at 07:54:05AM -0500, Marc Schwartz wrote:
 On Thu, 2006-09-07 at 06:18 -0500, Hao Chen wrote:
  Hi,
  
  I am using barplot and would like to know if it is possible to have bars
  filled with one color while use a different color for the shading lines. 
  
  The following code colors the shading lines, leaving the bars in white:
  
   barplot(1:5, col=c(1:5), density=c(1:5)*5)
  
  while the colors are applied to the bars when density is removed.
  
   barplot(1:5, col=c(1:5))
  
  I did check ?barplot and found the following: 
  
  col: a vector of colors for the bars or bar components. 
   
   Thanks,
  
   Hao
 
 Note the key word 'or' in the description of the 'col' argument.
 
 You need to make two separate calls to barplot(). The first using the
 fill colors, then the second using the shading lines AND setting 'add =
 TRUE', so that the second plot overwrites the first without clearing the
 plot device.
 
  barplot(1:5, col=c(1:5))
 
  barplot(1:5, col = black, density=c(1:5), add = TRUE)
 
 Just be sure that any other arguments, such as axis limits, are
 identical between the two calls.
 
 HTH,
 
 Marc Schwartz
 


Thank you very much for your help. It works but only in the order as you
put it, since the following code only shows the color, but not the
shading lines:

barplot(1:5, col = black, density=c(1:5))
barplot(1:5, col=c(1:5), add = TRUE)

Hao Chen

---
Mining PubMed: http://www.chilibot.net
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Re: [R] Automatic creation of file names

2005-09-22 Thread Hao Chen

On Thu, Sep 22, 2005 at 10:21:06AM -0400, Leite,Walter wrote:
 
 Dear R-Help members,
 
 
 I have a question about how to save to the hard drive the one thousand
 datasets I generated in a simulation. The datasets are created in a
 for loop that repeatedly creates normally distributed datasets, such
 as the example below:
 Library(MASS)
 for (number in 1:1000) {
 
 dataset = mvrnorm(n = 400, mu = c(0,0,0),
   Sigma = matrix(c(1,0.3,0.3,0.3,1,0.3,0.3,0.3,1),3,3))
 }
 
 I don't know how to write the datasets with different names to the hard
 drive. I have solved the problem before by creating a list of names
 (file1.txt, file2.txt,file3.txt, etc...) in Microsoft Excel, reading it
 to R with read.table, and using write.table to write each file with the
 name I created in Excel. 
 I want to know if it is possible to create a list of file names
 automatically within R to save the datasets created in my simulation.

paste(file, 1:1000, .txt, sep=)

 Thank you for your help,
 
 Walter L. Leite
 
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-- 
-
: Hao Chen, Ph.D.

: Instructor 
: Department of Pharmacology
: University of Tennessee Health Science Center
: Memphis, TN 38163 USA
: Office: 901 448 3201
: Mobil:  901 826 1845 

Mining PubMed: http://www.chilibot.net
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[R] win.metafile on linux?

2005-09-21 Thread Hao Chen
Dear R-help,

Is it possible to use win.metafile() on *nix versions of R?

I tried R 2.1.1 on FreeBSD and R 1.9.0 on redhat with no success. I need
to give some graphs generated in R to my boss so that he can modify them
in Powerpoint to fit he style of his presentation. Recommendations on
other methods are appreciated as well.

Hao 

-- 
: Hao Chen, Ph.D.

: Instructor 
: Department of Pharmacology
: University of Tennessee Health Science Center
: Memphis, TN 38163 USA
: Office: 901 448 3201
: Mobil:  901 826 1845 

: Mining PubMed: http://www.chilibot.net
: --

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