[R] how can I control the x-axis tick labels

[Don MacQueen]

Try:

   plot(    , xaxt='n',   )
   axis(1, at=c(1,2,3,4,5, ... all the rest of them ...) )

You might also need to use the  label argument to axis()

-Don

At 5:18 AM +0200 6/7/10, <mauede at alice.it> wrote:
>I am trying to generate a plot whose x-axis values are the following:
>
>  data_out[,1]
>   [1] 1979 1958 1937 1916 1895 1874 1853 1832 1811 1790 1769 1748 
>1727 1706 1685 1664 1643 1622 1601 1580 1559
>  [22] 1538 1517 1496 1475 1454 1433 1412 1391 1370 1349 1328 1307 
>1286 1265 1244 1223 1202 1181 1160 1139 1118
>  [43] 1097 1076 1055 1034 1013  992  971  950  929  908  887  866 
>845  824  803  782  761  740  719  698  677
>  [64]  656  635  614  593  572  551  530  509  488  467  446  425 
>404  383  362  341  320  299  278  257  236
>  [85]  215  194  173  152  131  110   89   68   47   26   25   24 
>23   22   21   20   19   18   17   16   15
>[106]   14   13   12   11   10    9    8    7    6    5    4    3    2    1
>
>The y-axis values are:
>
>>  data_out[,2]
>   [1]  1.01709  1.09454  1.16331  1.21673  1.26098  1.30297  1.33905 
>1.37466  1.40690  1.43407  1.46022
>  [12]  1.48497  1.50939  1.53382  1.55764  1.58068  1.60422  1.62692 
>1.64918  1.67210  1.69456  1.71653
>  [23]  1.73706  1.75634  1.77562  1.79505  1.81393  1.83259  1.85197 
>1.87105  1.88949  1.90792  1.92649
>  [34]  1.94479  1.96263  1.98029  1.99677  2.01212  2.02692  2.04183 
>2.05648  2.07071  2.08329  2.09510
>  [45]  2.10593  2.11636  2.12563  2.13423  2.14317  2.15116  2.15739 
>2.16426  2.17121  2.17796  2.18490
>  [56]  2.19103  2.19751  2.20357  2.21056  2.21642  2.22264  2.22861 
>2.23448  2.24007  2.24601  2.25113
>  [67]  2.25593  2.25842  2.26077  2.26183  2.26223  2.26224  2.26133 
>2.25868  2.25493  2.25130  2.24704
>  [78]  2.24123  2.23236  2.22251  2.20842  2.19076  2.17490  2.15480 
>2.13716  2.11967  2.10428  2.08815
>  [89]  2.07497  2.06104  2.05527  2.05412  2.06270  2.08828  2.09092 
>2.09158  2.09290  2.09495  2.09370
>[100]  2.09703  2.10551  2.10771  2.10916  2.11557  2.12741  2.13782 
>2.14946  2.16577  2.18978  2.21518
>[111]  2.25129  2.27978  2.32903  2.40820  2.50683  2.64452  3.06182 
>3.97841 35.81950
>
>I cannot get my ploy start with the tick label "1". Surprisingly it 
>keeps starting from 0 regardless of the usage of the graphic 
>parameter xlim.
>I tried many different combinations of the parameters appearing in 
>the plot instruction.
>I also tried to sort the x-axis value in increasing order.
>
>> 
>>plot(sort(data_out[,1]),sort(data_out[,2],decreasing=T),xlim=c(1,1979),ylim=c(1,35),main="Intrinsic 
>>Dimensionality of 2D Swiss 
>>Roll",font.main=2,cex.main=1.5,col.main="red",xlab="Number of 
>>Nearest-Neighbors",ylab="Dimension",type="l",lab=c(10,10,3))
>
>How can I get the x-axis tick labels to be (a subset of) the x-axis 
>values, that is:
>
>   1    2    3    4    5    6    7    8    9   10   11   12   13   14 
>15   16   17   18   19   20   21
>  22   23   24   25   26   47   68   89  110  131  152  173  194  215 
>236  257  278  299  320  341  362
>  383  404  425  446  467  488  509  530  551  572  593  614  635 
>656  677  698  719  740  761  782  803
>  824  845  866  887  908  929  950  971  992 1013 1034 1055 1076 
>1097 1118 1139 1160 1181 1202 1223 1244
>1265 1286 1307 1328 1349 1370 1391 1412 1433 1454 1475 1496 1517 
>1538 1559 1580 1601 1622 1643 1664 1685
>1706 1727 1748 1769 1790 1811 1832 1853 1874 1895 1916 1937 1958 1979
>
>Thank you in advance,
>Maura
>
>
>tutti i telefonini TIM!
>
>
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>
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-- 
---------------------------------
Don MacQueen
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062
macq at llnl.gov