[R] Making plot with "sub"-X values

joe1985 johannes at dsr.life.ku.dk
Fri Feb 13 14:50:43 CET 2009


Hello

I have a big dataset where i have pulled out some periods of time acording
to a herd-number (see below):

CHR_NR  DATO_TEST SALMO_INDEX didiffdatoperiode
11377    2003-06-20         7.9                29    
11377    2003-09-01         4.3                59    
11377    2004-02-24         5.1                78    

where the variable 'diffdatoperiode' is the period in days and represents
the x-value and 'CHR_NR' is the herd number.

These periods corresponds to a sum of periods in the variable 'diffdato1',
and each of these periods have an y-value represented by the variable
'SALMO_INDEX':

CHR_NR  DATO_TEST SALMO_INDEX diffdato        diffdato1
11377    2003-05-22        17.0         14                   15                                                               
11377    2003-06-06        18.8         15                   14
11377    2003-07-04        20.1         14                   17 
11377    2003-07-21        32.9         17                   14 
11377    2003-08-04        19.9         14                   14      
11377    2003-08-18        10.5         14                   14
11377    2003-12-08        20.5         27                   29
11377    2004-01-06        28.6         29                    8    
11377    2004-01-14        28.6          8                     8 
11377    2004-01-22        19.0          8                     7 
11377    2004-01-29        19.0          7                     7 
11377    2004-02-05        14.4          7                     7 
11377    2004-02-12        14.4          7                    12
 
So, 29 = 15 +14, 59 = 17 + 14 + 14 +14 and 78 = 29 + 8 + 8+ +7 +7 +7 + 12. 

So i need a plot where the y-axis is the 'SALMO_INDEX' corresponding to the
values in 'diffdato1', and the x-axis is the 'diffdato' and 'difdato1' at
the same time. So the periods in 'diffdato1' is kind of like "sub"-x values
to the periods in 'diffdato'. So the plot should be created like if the
three values 29, 59 and 78 each had a x-axis, but together in one x-axis.
It's a little bit hard to expalin.

Hope you can help me
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