R plot png x11 error in centos

Problem:

Using the R to plot the figure and want to store with png file,
such as png(file="a.png")
but it will appear
Error in  png(file="a.png"): X11 is not available

Solution:

I used the R.2.15.2.
1. First you should install the important package for plotting
{
yum install -y cairo-devel.x86_64
yum install -y libpng-devel.x86_64 
}

2. configure and compile the R
{

 ./configure --with-x=no


  R is now configured for x86_64-unknown-linux-gnu

  Source directory:          .
  Installation directory:  
  C compiler:                gcc -std=gnu99  -g -O2
  Fortran 77 compiler:       gfortran  -g -O2

  C++ compiler:              g++  -g -O2
  Fortran 90/95 compiler:    gfortran -g -O2
  Obj-C compiler:            

  Interfaces supported:     
  External libraries:        readline
  Additional capabilities:   PNG, TIFF, NLS, cairo
  Options enabled:           shared BLAS, R profiling, Java

then 
make
}

3. Execute the R and check the png is TURE
{
> capabilities()
    jpeg      png     tiff    tcltk      X11     aqua http/ftp  sockets
   FALSE     TRUE     TRUE    FALSE    FALSE    FALSE     TRUE     TRUE
  libxml     fifo   cledit    iconv      NLS  profmem    cairo
    TRUE     TRUE     TRUE     TRUE     TRUE    FALSE     TRUE
}

4. Check and setting the bitmapType as cairo in R environment
{
>options(bitmapType="cairo")
}

Reference:

unable to start PNG / X11 in rstudio
How to get R to compile with PNG support
R install
R dowload

Centos x11