[R] A question on histogram (hist): coordinates on x-axis are too sparse

[Li, Hua]

Dear R helpers:
     Let's say I have some data  X,   
     X <- runif(1000, 1, 10000000000)
     pdf('X.pdf', width=100,height=5)
     hist(X, breaks=1000)
     dev.off()
     I find that, on x-axis the coordinates are  0e+00,  2e+09, 4e+09, 6e+09, 8e+09, 1e+10.  Only five numbers, which is too sparse in a 100x5 pdf file.  I want the x-axis coordinates to become more dense,  e.g.  0e+00,  1e+09, 2e+09, 3e+09,..... 8e+09, 9e+09,  1e+10.  What argument (or function) should I revise to let this happen??
     Thanks a lot!!
Best, Hua
 
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HUA LI
Graduate student
Biomathematics & Biostatistics
The University of Texas Health Science Center At Houston