Scatter plotting DE values along a contiguous chromosomal x axis

Question

[Sakti]

Dear Biostars,

I am trying to make a scatterplot to show my RNA-Seq log2fold values along all the chromosomal positions for the human genome. Something like this:

              |  ***            ***         **    *   ***
log2fold      |  *  **   ***  *       ***     *  *
              |________|_*___|___**_|_____|_*__|___|__**|  ...
                chr1    chr2   chr3   chr4 chr5 chr6 chr7  ...

I was thinking on using the chr1,chr2..etc indexes and then simply plot the two vectors, but I run into the problem of labeling each chromosome with its corresponding size. Any help would be appreciated!!