[R] Odp: Plot a matrix

[alcesgabbo]

I explain better....

                  key
index               sensor1.A sensor1.B sensor2.A sensor2.B sensor3.A
  2010-10-1 7:32:00         8        NA         5        NA         2
  2010-10-3 4:33:21        NA         3        NA         2         1
  2010-10-5 7:32:00        NA         4        NA         6         7

its a matrix.


The first row contains a list (not exactly an array) of date (index it's
just a name, I can substitute that nale with "Dates" for example)

if I do:
str(m[,0])

 int[1:3, 0 ] 
 - attr(*, "dimnames")=List of 2
  ..$ index: chr [1:3] "2010-10-1 7:32:00" "2010-10-3 4:33:21" "2010-10-5
7:32:00"
  ..$ key  : NULL


If I do:

plot(m[,5],type="o")

I can see 3 point with lines:
sensor3.A
2
1
7
 it is OK 
but in the x axes there is 
1.0 1.5 2.0 2.5 3.0 
instead of 
2010-10-1 7:32:00   2010-10-3 4:33:21   2010-10-5 7:32:00

How can I solve this problem??

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