Using geom_line with multiple groupings
I have a table as follows:
> testsizes
size value replicate lane
361 16 6898 1 L1
362 17 10707 1 L1
363 18 1786 1 L1
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Based off my comment about interacting the two:
ggplot(testsizes, aes(x = size, y = value, group = interaction(replicate, lane), colour = lane)) + geom_line()Which gives:
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As @joran pointed out, if ggplot could do this itself it would simply be concatenating the two groups anyway. So concatenating the two groups myself is the right way to go and gives me the desired result:
> testlengths$replane <- paste(testlengths$replicate, testlengths$lane, sep="_") > testlengths size value replicate lane replane 361 16 6898 1 L1 1_L1 362 17 10707 1 L1 1_L1 363 18 1786 1 L1 1_L1 364 19 1721 1 L1 1_L1 365 20 2454 1 L1 1_L1 421 16 8486 2 L1 2_L1 422 17 26691 2 L1 2_L1 423 18 3241 2 L1 2_L1 424 19 5068 2 L1 2_L1 425 20 7579 2 L1 2_L1 481 16 4152 3 L1 3_L1 482 17 4452 3 L1 3_L1 483 18 899 3 L1 3_L1 484 19 1973 3 L1 3_L1 485 20 2595 3 L1 3_L1 571 16 8284 1 L2 1_L2 572 17 9045 1 L2 1_L2 573 18 5041 1 L2 1_L2 574 19 7160 1 L2 1_L2 575 20 9730 1 L2 1_L2 631 16 5639 2 L2 2_L2 632 17 9773 2 L2 2_L2 633 18 2433 2 L2 2_L2 634 19 3017 2 L2 2_L2 635 20 3864 2 L2 2_L2 691 16 10161 3 L2 3_L2 692 17 18609 3 L2 3_L2 693 18 3760 3 L2 3_L2 694 19 3543 3 L2 3_L2 695 20 4257 3 L2 3_L2 > ggplot(testlengths, aes(size, value, group=replane, colour=lane)) + geom_line()
I guess the moral here is to do as much preprocessing of your table as you can before giving it to ggplot.
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