[R] Latex fonts in R graphics

2010-09-11 Thread KARAVASILIS GEORGE

Hello, R users.
I am trying to embed Computer modern fonts to an R plot and I get the 
following error.


CM - Type1Font(CM,
+  c(paste(cm-lgc/fonts/afm/public/cm-lgc/,
+ c(fcmr8a.afm, fcmb8a.afm, fcmri8a.afm, fcmbi8a.afm), sep=),
+ ./cmsyase.afm))
 pdf(cm.pdf, width=3, height=3, family=CM)
 plot(1:length(y), y, xlab=ss, ylab=expression(x[2]))  ## for any 
vector y

 dev.off()
null device
  1
 embedFonts(cm.pdf, outfile=cmembed.pdf, 
fontpaths=c(cm-lgc/fonts/type1/public/cm-lgc, .))
Error in embedFonts(cm.pdf, outfile = cmembed.pdf, fontpaths = 
c(cm-lgc/fonts/type1/public/cm-lgc,  :
  status -1 in running command 'gswin32c.exe -dNOPAUSE -dBATCH -q 
-dAutoRotatePages=/None -sDEVICE=pdfwrite 
-sOutputFile=C:\DOCUME~1\user\LOCALS~1\Temp\RtmpccEtgV\Rembed28163716 
-sFONTPATH=cm-lgc/fonts/type1/public/cm-lgc;.  cm.pdf'

In addition: Warning message:
In system(cmd) : gswin32c.exe not found


Operating system: Windows XP, SP2.
cm-lgc has been unzipped in the working directory  C:/Program 
Files/R/R-2.10.1 and the AFM, PFB files are also in same directory.

Any help?

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[R] Tex fonts in R plots

2009-07-07 Thread KARAVASILIS GEORGE

Hello, R users.
I would like to display the font of Math Mode of MikTex 2.3, WinEdt 5.4 
in R plots, e.g. in xlab, ylab or legend.

How can I do that?
Thank you in advance.

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[R] mapply

2009-05-30 Thread KARAVASILIS GEORGE

Hello, R users.
I would like to count the number of triples (r_i, s_j, t_k) with r_i, 
s_j, t_k distinct and abs((r_i-t_k)-u)=0 and abs((s_j-t_k)-v)=0, where 
r_i, s_j, t_k are the elements of three vectors a,b,c with different 
lengths and u,v=1:n. I have solved this problem writing a subroutine in 
Fortran an calling .Fortran(). I would like to find another way to use  
functions like mapply. I tried this one:


 xx - mapply( function(u,v)   {
 kk - outer(a, c, function(s,t) abs((s-t)-u)==0)
 ll - outer(b, c, function(s,t) abs((s-t)-v)==0)
 sum( outer( which(kk==TRUE, TRUE)[,2], which(ll==TRUE, TRUE)[,2], 
function(s,t) s==t)  )  },

 rep(1:n, each=n), rep(1:n, times=n))

 xx - matrix(xx, nrow=n, ncol=n, byrow=TRUE)

It works but it is rather slow. Taking into account that my vectors have 
lengths 3000, and n is from 50 to 200, can I do something to improve the 
running  time of the above code?


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[R] avoid a loop

2009-05-28 Thread KARAVASILIS GEORGE

Hello, R users.
I have the following code:

a=1:10
b=-3:15
n=5
x - rep(0,n)
for (i in 1:n) x[i] - sum( outer(a,b, function(s,t)  abs(a-b-i)==0) )

Can someone tell me if I could avoid the for command?

Thank you in advance.

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[R] definition of a function

2008-10-28 Thread KARAVASILIS GEORGE

Hello, R subscribers.
I would like to define a function like this one:
Fun - function(x)sin(x)/x
with value 1 at x=0. How can I do that?
Is there a way to plot it symbolically, without using x as a vector?
e.g.
x - seq(from=-10, to=10, length=100)
plot(x, Fun(x))
Thank you in advance.

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