[R] Plotting more than one regression line in ggplot

David Winsemius dw|n@em|u@ @end|ng |rom comc@@t@net
Wed Jun 5 19:12:11 CEST 2019


On 6/5/19 9:57 AM, David Winsemius wrote:
> On 6/5/19 9:37 AM, rain1290 using aim.com wrote:
>> Hi David (and everyone),
>>
>> Thank you for your response. I changed the column names to x and y,
>> but the error/warning persists:
>>
>> Warning message: Computation failed in `stat_smooth()`: 'what' must be
>> a function or character string
>>
>> It is quite baffling as to why this is happening. Why would it work
>> for the scatter plot and not the regression line?


I'll add that I can reproduce a similar error but not the one you reported:


 > lm <- ggplot(onepctCO2MEDIAN) +
+     geom_point(aes(x,y),
+                 colour="blue") + geom_smooth(aes(x,y), method=lm)
 > lm
Warning message:
Computation failed in `stat_smooth()`:
'what' must be a function or character string

Rerunning after removing the `lm` data object allows successful execution:

  rm(lm)
  ggplot(onepctCO2MEDIAN) +
      geom_point(aes(x,y),
                  colour="blue") + geom_smooth(aes(x,y), method=lm)


So it's probably related to the non-standard evaluation where a function 
or a function name can be used and if there is a function name offered, 
the ggplot evaluation model first turns it into a character string and 
then accesses a data object instead of a function.

I'm guessing this would be seen by the package maintainer in due course, 
but I'm copying him.

-- 

David

>
> Since it works perfectly well on my machine, that means we are now
> lacking the required information (from you)  that is generally delivered
> via `sessionInfo()`. I get:
>
> R version 3.5.2 (2018-12-20)
> Platform: x86_64-pc-linux-gnu (64-bit)
> Running under: Ubuntu 18.04.1 LTS
>
> Matrix products: default
> BLAS: /usr/lib/x86_64-linux-gnu/openblas/libblas.so.3
> LAPACK: /usr/lib/x86_64-linux-gnu/libopenblasp-r0.2.20.so
>
> locale:
>    [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C LC_TIME=en_US.UTF-8
>    [4] LC_COLLATE=en_US.UTF-8     LC_MONETARY=en_US.UTF-8
> LC_MESSAGES=en_US.UTF-8
>    [7] LC_PAPER=en_US.UTF-8       LC_NAME=C LC_ADDRESS=C
> [10] LC_TELEPHONE=C             LC_MEASUREMENT=en_US.UTF-8
> LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods base
>
> other attached packages:
> [1] ggplot2_3.1.1 zoo_1.8-5
>
> loaded via a namespace (and not attached):
>    [1] Rcpp_1.0.1       lattice_0.20-38  withr_2.1.2 assertthat_0.2.1
> dplyr_0.8.0.1
>    [6] crayon_1.3.4     R6_2.4.0         grid_3.5.2 plyr_1.8.4
> gtable_0.3.0
> [11] magrittr_1.5     scales_1.0.0     pillar_1.3.1 rlang_0.3.4
> lazyeval_0.2.2
> [16] rstudioapi_0.10  labeling_0.3     tools_3.5.2 glue_1.3.1
> purrr_0.3.2
> [21] munsell_0.5.0    yaml_2.2.0       compiler_3.5.2 pkgconfig_2.0.2
> colorspace_1.4-1
> [26] tidyselect_0.2.5 tibble_2.1.1
>
> I'm also running:
>
> RStudio
> Version 1.1.463 – © 2009-2018 RStudio, Inc.
>
>
> You should now restart a clean session, try again with just the required
> packages and report back with full code and data.
>
>
> Best;
>
> David
>
>
>>
>> -----Original Message-----
>> From: David Winsemius <dwinsemius using comcast.net>
>> To: r-help <r-help using r-project.org>
>> Sent: Wed, Jun 5, 2019 12:00 pm
>> Subject: Re: [R] Plotting more than one regression line in ggplot
>>
>>
>> On 6/5/19 8:04 AM, rain1290--- via R-help wrote:
>>> Hi Jeff (and everyone),
>>>
>>> Thank you for your response and feedback. Yes, I know what you mean
>> - it was a blind and quick choice to use "lm" as my object name.
>> Unfortunately, changing the object name to something else does not
>> eliminate that error/warning message. As a result, the same
>> error/warning appears when running it. Oddly enough, the scatter plot
>> is just fine - it's the regression line that struggles to appear.
>> Could there be another reason for that?
>>> Thanks, again,
>>
>> TRhe error came because you did not reference the column names
>> correctly. This succeeds with the data you offered:
>>
>>
>> ggplot(onepctCO2MEDIAN) +
>>       geom_jitter(aes(x,y),
>>                   colour="blue") + geom_smooth(aes(x,y), method=lm)
>>
>>
>> # At some point you changed the column names from
>> (RCP1pctCO2cumulativeMedian, departurea) to (x,y) , but didn't adjust
>> your code.
>>
>>
>> Best;
>>
>> David.
>>
>>> -----Original Message-----
>>> From: Jeff Newmiller <jdnewmil using dcn.davis.ca.us>
>>> To: rain1290 <rain1290 using aim.com>; rain1290--- via R-help
>> <r-help using r-project.org>; r-help <r-help using R-project.org>; r-sig-geo
>> <r-sig-geo using r-project.org>
>>> Sent: Wed, Jun 5, 2019 10:49 am
>>> Subject: Re: [R] Plotting more than one regression line in ggplot
>>>
>>> Please read the Posting Guide... posting HTML on a plain text
>> mailing list really interferes with clear communication.
>>> If you had spent even a small amount of time working with R
>> tutorials then you would know that "lm" is the name of a very basic,
>> very important R function. However, you are defining your own object
>> called "lm" that is very different indeed than the usual "lm"
>> function. I would guess that in a clean new R workspace where you had
>> not already run your ggplot function and assigned the result to your
>> own "lm" object then this code might run. However, once you have run
>> it once and try to run it again, your "method" argument gives the
>> wrong version of "lm" to geom_smooth and you confuse it.
>>> As the doctor said to the man pounding his own head against the
>> wall, "If it hurts, don't do that." Avoid re-using important object
>> names in R... some common names I see abused this way are df, data, c,
>> t, T, and F. Your choice was unusual, but quite effective at
>> illustrating the problem.
>>> On June 5, 2019 7:21:57 AM PDT, rain1290--- via R-help
>> <r-help using r-project.org> wrote:
>>>> I am trying to plot, using ggplot, a series of scatter plots with
>>>> regression lines for several datasets. I started with the following
>>>> dataset, "onepectCO2MEDIAN". The data for this dataset is as follows:
>>>>        onepctCO2MEDIAN
>>>>                        x          y
>>>>        layer.1   0.000000000  0.0000000
>>>>        layer.2   0.006794447  4.9002490
>>>>        layer.3   0.014288058  0.1608000
>>>>        layer.4   0.022087920  6.6349133
>>>>        layer.5   0.030797357 -1.2429506
>>>>        layer.6   0.038451072  1.5643374
>>>>        layer.7   0.048087904 -2.2659035
>>>>        layer.8   0.058677729  2.2070045
>>>>        layer.9   0.069261406 -2.3677001
>>>>        layer.10  0.080524530 -1.0913506
>>>>        layer.11  0.092760246  0.4099940
>>>>        layer.12  0.103789609 -0.1259727
>>>>        layer.13  0.116953168 -2.4138253
>>>>        layer.14  0.129253298  7.0890257
>>>>        layer.15  0.141710050 -0.7593539
>>>>        layer.16  0.156002052  0.0454416
>>>>        layer.17  0.170648172 -1.5349683
>>>>        layer.18  0.185318425  6.5524201
>>>>        layer.19  0.199463055 -0.8312563
>>>>        layer.20  0.213513337 -2.5099183
>>>>        layer.21  0.228839271  0.1365968
>>>>        layer.22  0.246981293 -1.3719845
>>>>        layer.23  0.263012767 -0.8712988
>>>>        layer.24  0.278505564  0.6632584
>>>>        layer.25  0.293658361  0.7938036
>>>>        layer.26  0.310747266  3.4880637
>>>>        layer.27  0.325990349 -4.4612208
>>>>        layer.28  0.342517540  0.0871734
>>>>        layer.29  0.362751633 -1.4171578
>>>>        layer.30  0.380199537 -0.9956508
>>>>        layer.31  0.394992948  0.3215526
>>>>        layer.32  0.414373398  3.1403866
>>>>        layer.33  0.430690214 -0.7376099
>>>>        layer.34  0.449738145 -2.4860541
>>>>        layer.35  0.470167458 -3.4235858
>>>>        layer.36  0.489019871  0.4824748
>>>>        layer.37  0.507242471 -0.9785386
>>>>        layer.38  0.524314284  8.5359684
>>>>        layer.39  0.543750525  5.4844742
>>>>        layer.40  0.564234197  3.2149367
>>>>        layer.41  0.583679616  3.9168916
>>>>        layer.42  0.601459444  4.4907020
>>>>        layer.43  0.619924664  6.5410410
>>>>        layer.44  0.639932007  4.8068650
>>>>        layer.45  0.661347181  8.1510170
>>>>        layer.46  0.684117317  0.2697413
>>>>        layer.47  0.704829752 -0.1807501
>>>>        layer.48  0.725045770  9.7181249
>>>>        layer.49  0.745165825  1.5406466
>>>>        layer.50  0.765016139 -1.6476041
>>>>        layer.51  0.783461511  4.8024603
>>>>        layer.52  0.806382924  4.0421516
>>>>        layer.53  0.829241335  9.3756512
>>>>        layer.54  0.849924415  5.3305050
>>>>        layer.55  0.871352434  7.5445803
>>>>        layer.56  0.893632233  6.4679547
>>>>        layer.57  0.916052133  2.8096065
>>>>        layer.58  0.938579470  5.3921661
>>>>        layer.59  0.959907651  7.2043689
>>>>        layer.60  0.981643587  3.3350806
>>>>        layer.61  1.004116774  8.8690707
>>>>        layer.62  1.028363466  1.7861299
>>>>        layer.63  1.054009140  6.2555038
>>>>        layer.64  1.072440803  7.6079236
>>>>        layer.65  1.094457805  7.6871483
>>>>        layer.66  1.123176277  4.7787764
>>>>        layer.67  1.149430871 12.7110502
>>>>        layer.68  1.170912921 -0.7156284
>>>>        layer.69  1.196743071  1.6490899
>>>>        layer.70  1.218625903  3.0363024
>>>>        layer.71  1.241868377  4.2974769
>>>>        layer.72  1.267941594  1.9543778
>>>>        layer.73  1.290708780  3.9986964
>>>>        layer.74  1.313222289  4.5179472
>>>>        layer.75  1.339045882  0.9337905
>>>>        layer.76  1.362803459  3.3050770
>>>>        layer.77  1.384450197  3.5422970
>>>>        layer.78  1.409720302  5.9973660
>>>>        layer.79  1.435851157  0.5081869
>>>>        layer.80  1.455592215  7.9661630
>>>>        layer.81  1.479495347  9.9460496
>>>>        layer.82  1.506051958  3.7908372
>>>>        layer.83  1.525728464  2.5735847
>>>>        layer.84  1.549362063 10.1404974
>>>>        layer.85  1.573440671 13.7408304
>>>>        layer.86  1.600278735  0.9335771
>>>>        layer.87  1.623879492  9.7588742
>>>>        layer.88  1.650029302  1.2769395
>>>>        layer.89  1.672362328 13.4970906
>>>>        layer.90  1.700221121 10.2087502
>>>>        layer.91  1.724793375  1.6811275
>>>>        layer.92  1.751070559  6.1178992
>>>>        layer.93  1.778022110 -0.1567626
>>>>        layer.94  1.803022087  3.8237479
>>>>        layer.95  1.830668867  4.4331468
>>>>        layer.96  1.855736911  5.9790707
>>>>        layer.97  1.882615030 11.3104333
>>>>        layer.98  1.909218490  8.2142607
>>>>        layer.99  1.938130021 15.3209674
>>>>        layer.100 1.963727593  5.8178217
>>>>        layer.101 1.993271947  9.6004907
>>>>        layer.102 2.022548139  3.4063646
>>>>        layer.103 2.050679922  4.7375010
>>>>        layer.104 2.078064442  3.0133019
>>>>        layer.105 2.104113460  5.5659522
>>>>        layer.106 2.133597612 12.0346333
>>>>        layer.107 2.164026260 -0.4028320
>>>>        layer.108 2.194852829 10.5996780
>>>>        layer.109 2.224257946  5.4479584
>>>>        layer.110 2.252194643  4.7052374
>>>>        layer.111 2.277335048 14.0962019
>>>>        layer.112 2.304058313  5.7149016
>>>>        layer.113 2.330930233  3.7780072
>>>>        layer.114 2.357022762  4.4120620
>>>>        layer.115 2.386489272  4.1866085
>>>>        layer.116 2.417503953  6.9078802
>>>>        layer.117 2.448524356  2.7825739
>>>>        layer.118 2.478698969  7.6171786
>>>>        layer.119 2.510175705 10.2410603
>>>>        layer.120 2.539697886  8.1820711
>>>>        layer.121 2.567915559  4.8275494
>>>>        layer.122 2.597463250 19.1624883
>>>>        layer.123 2.627518773 16.0677109
>>>>        layer.124 2.658759236 12.5897081
>>>>        layer.125 2.692401528  9.2907988
>>>>        layer.126 2.721903205  7.4262502
>>>>        layer.127 2.753021359  9.3902518
>>>>        layer.128 2.786313415 12.6193550
>>>>        layer.129 2.819564104 11.1121040
>>>>        layer.130 2.850823164 15.7907100
>>>>        layer.131 2.880394101 10.7425287
>>>>        layer.132 2.911391258  7.7971430
>>>>        layer.133 2.942965150  8.8060858
>>>>        layer.134 2.974468350 17.5606266
>>>>        layer.135 3.008983612 17.3088605
>>>>        layer.136 3.040015221 13.4500543
>>>>        layer.137 3.072668672 14.6377884
>>>>        layer.138 3.105982423 8.0798552dput(onepctCO2MEDIAN)
>>>> dput(onepctCO2MEDIAN)
>>>>        structure(list(x = c(0, 0.00679444684647024, 0.014288058038801,
>>>>        0.0220879195258021,
>>>> 0.0307973567396402,0.0384510718286037,0.0480879042297602,
>>>>        0.0586777292191982, 0.0692614056169987,
>>>> 0.080524530261755,0.0927602462470531,
>>>>        0.103789608925581, 0.116953168064356, 0.129253298044205,
>>>> 0.141710050404072,
>>>>        0.156002052128315, 0.170648172497749, 0.185318425297737,
>>>> 0.199463054537773,
>>>>        0.21351333707571, 0.22883927077055, 0.246981292963028,
>>>> 0.263012766838074,
>>>>        0.278505563735962, 0.29365836083889, 0.310747265815735,
>>>> 0.325990349054337,
>>>>        0.342517539858818, 0.362751632928848, 0.380199536681175,
>>>> 0.39499294757843,
>>>>        0.414373397827148, 0.430690214037895, 0.449738144874573,
>>>> 0.470167458057404,
>>>>        0.489019870758057, 0.507242470979691, 0.524314284324646,
>>>> 0.543750524520874,
>>>>        0.56423419713974, 0.583679616451263, 0.601459443569183,
>>>> 0.619924664497375,
>>>>        0.639932006597519, 0.661347180604935, 0.684117317199707,
>>>> 0.704829752445221,
>>>>        0.725045770406723, 0.745165824890137, 0.765016138553619,
>>>> 0.783461511135101,
>>>>        0.806382924318314, 0.829241335391998, 0.84992441534996,
>>>> 0.871352434158325,
>>>>        0.893632233142853, 0.916052132844925, 0.938579469919205,
>>>> 0.959907650947571,
>>>>        0.981643587350845, 1.00411677360535, 1.02836346626282,
>>>> 1.05400913953781,
>>>>        1.07244080305099, 1.09445780515671, 1.12317627668381,
>>>> 1.14943087100983,
>>>>        1.17091292142868, 1.19674307107925, 1.21862590312958,
>>>> 1.24186837673187,
>>>>        1.26794159412384, 1.2907087802887, 1.31322228908539,
>>>> 1.33904588222504,
>>>>        1.36280345916748, 1.38445019721985, 1.40972030162811,
>>>> 1.43585115671158,
>>>>        1.45559221506119, 1.47949534654617, 1.50605195760727,
>>>> 1.52572846412659,
>>>>        1.5493620634079, 1.5734406709671, 1.60027873516083,
>>>> 1.62387949228287,
>>>>        1.65002930164337, 1.67236232757568, 1.70022112131119,
>>>> 1.72479337453842,
>>>>        1.75107055902481, 1.77802211046219, 1.80302208662033,
>>>> 1.83066886663437,
>>>>        1.85573691129684, 1.88261502981186, 1.90921849012375,
>>>> 1.93813002109528,
>>>>        1.96372759342194, 1.99327194690704, 2.02254813909531,
>>>> 2.05067992210388,
>>>>        2.07806444168091, 2.1041134595871, 2.13359761238098,
>>>> 2.16402626037598,
>>>>        2.19485282897949, 2.2242579460144, 2.25219464302063,
>>>> 2.27733504772186,
>>>>        2.30405831336975, 2.33093023300171, 2.35702276229858,
>>>> 2.38648927211761,
>>>>        2.41750395298004, 2.44852435588837, 2.47869896888733,
>>>> 2.51017570495605,
>>>>        2.53969788551331, 2.567915558815, 2.59746325016022,
>>>> 2.62751877307892,
>>>>        2.65875923633575, 2.69240152835846, 2.72190320491791,
>>>> 2.75302135944366,
>>>>        2.78631341457367, 2.8195641040802, 2.85082316398621,
>>>> 2.88039410114288,
>>>>        2.91139125823975, 2.94296514987946, 2.97446835041046,
>>>> 3.00898361206055,
>>>>        3.04001522064209, 3.07266867160797, 3.10598242282867), y = c(0,
>>>>        4.90024901723162, 0.160799993152722, 6.63491326258641,
>>>> -1.24295055804536,
>>>>        1.56433744259162, -2.26590352245208, 2.20700446463354,
>>>> -2.36770012911069,
>>>>        -1.09135061899174, 0.409993989292701, -0.125972681525582,
>>>> -2.41382533818026,
>>>>        7.08902570153028, -0.759353880417294, 0.0454415959640926,
>>>> -1.53496826259972,
>>>>        6.55242014096194, -0.831256280861552, -2.50991825629084,
>>>> 0.136596820654013,
>>>>        -1.37198445498419, -0.871298832596736, 0.663258363762466,
>>>> 0.793803634291308,
>>>>        3.48806373666998, -4.46122081238949, 0.0871733966938564,
>>>> -1.41715777257774,
>>>>        -0.995650815648318, 0.32155262317503, 3.14038657369241,
>>>> -0.737609879885404,
>>>>        -2.48605406511292, -3.423585843908, 0.482474753780281,
>>>> -0.978538630093809,
>>>>        8.53596837794201, 5.48447420320695, 3.21493665820644,
>>>> 3.91689160157513,
>>>>        4.49070195980797, 6.54104103157039, 4.80686500146557,
>>>> 8.15101701282067,
>>>>        0.26974132191657, -0.180750068063062, 9.71812491230244,
>>>> 1.54064657400204,
>>>>        -1.64760408795688, 4.80246028991894, 4.04215159914344,
>>>> 9.37565121768513,
>>>>        5.33050496938428, 7.54458026088508, 6.46795470819342,
>>>> 2.80960651433971,
>>>>        5.39216613235986, 7.20436888038562, 3.3350806460997,
>>>> 8.86907069895943,
>>>>        1.78612988613659, 6.25550382050395, 7.60792364896564,
>>>> 7.68714830528144,
>>>>        4.77877638957615, 12.7110501777314, -0.715628443181046,
>>>> 1.64908991824022,
>>>>        3.03630240714679, 4.29747688442346, 1.95437780501881,
>>>> 3.99869636910933,
>>>>        4.51794724689848, 0.933790484492299, 3.30507700050003,
>>>> 3.5422970157433,
>>>>        5.99736597322524, 0.508186860060022, 7.96616300581067,
>>>> 9.94604963036295,
>>>>        3.79083717222623, 2.57358468532258, 10.1404974171776,
>>>> 13.7408303595752,
>>>>        0.933577123801399, 9.75887417074129, 1.27693947132921,
>>>> 13.4970905965787,
>>>>        10.2087501765735, 1.68112753028756, 6.1178991508927,
>>>> -0.156762622680077,
>>>>        3.82374791691426, 4.43314678736265, 5.97907067167507,
>>>> 11.3104332518482,
>>>>        8.21426074201525, 15.320967360602, 5.81782169471483,
>>>> 9.6004907412354,
>>>>        3.40636455909704, 4.73750103921864, 3.0133019468806,
>>>> 5.56595224859066,
>>>>        12.0346332527215, -0.40283199827104, 10.5996779538754,
>>>> 5.44795836991128,
>>>>        4.70523736412729, 14.096201892183, 5.71490161813391,
>>>> 3.77800720810782,
>>>>        4.41206200639436, 4.18660847858423, 6.90788020044911,
>>>> 2.78257393345915,
>>>>        7.61717857379431, 10.2410602647684, 8.18207106836167,
>>>> 4.82754943871433,
>>>>        19.1624882857155, 16.0677109398509, 12.589708067017,
>>>> 9.29079879799404,
>>>>        7.42625019725314, 9.39025179806185, 12.6193550331438,
>>>> 11.1121039747257,
>>>>        15.7907099734986, 10.7425286789233, 7.79714300307344,
>>>> 8.80608578166101,
>>>>        17.5606266346039, 17.3088604929222, 13.4500543478523,
>>>> 14.6377884248645,
>>>>        8.07985518296064)), class = "data.frame", row.names = c("layer.1",
>>>>        "layer.2", "layer.3", "layer.4", "layer.5", "layer.6", "layer.7",
>>>>        "layer.8", "layer.9", "layer.10", "layer.11", "layer.12",
>>>> "layer.13",
>>>>        "layer.14", "layer.15", "layer.16", "layer.17", "layer.18",
>>>> "layer.19",
>>>>        "layer.20", "layer.21", "layer.22", "layer.23", "layer.24",
>>>> "layer.25",
>>>>        "layer.26", "layer.27", "layer.28", "layer.29", "layer.30",
>>>> "layer.31",
>>>>        "layer.32", "layer.33", "layer.34", "layer.35", "layer.36",
>>>> "layer.37",
>>>>        "layer.38", "layer.39", "layer.40", "layer.41", "layer.42",
>>>> "layer.43",
>>>>        "layer.44", "layer.45", "layer.46", "layer.47", "layer.48",
>>>> "layer.49",
>>>>        "layer.50", "layer.51", "layer.52", "layer.53", "layer.54",
>>>> "layer.55",
>>>>        "layer.56", "layer.57", "layer.58", "layer.59", "layer.60",
>>>> "layer.61",
>>>>        "layer.62", "layer.63", "layer.64", "layer.65", "layer.66",
>>>> "layer.67",
>>>>        "layer.68", "layer.69", "layer.70", "layer.71", "layer.72",
>>>> "layer.73",
>>>>        "layer.74", "layer.75", "layer.76", "layer.77", "layer.78",
>>>> "layer.79",
>>>>        "layer.80", "layer.81", "layer.82", "layer.83", "layer.84",
>>>> "layer.85",
>>>>        "layer.86", "layer.87", "layer.88", "layer.89", "layer.90",
>>>> "layer.91",
>>>>        "layer.92", "layer.93", "layer.94", "layer.95", "layer.96",
>>>> "layer.97",
>>>>        "layer.98", "layer.99", "layer.100", "layer.101", "layer.102",
>>>>        "layer.103", "layer.104", "layer.105", "layer.106", "layer.107",
>>>>        "layer.108", "layer.109", "layer.110", "layer.111", "layer.112",
>>>>        "layer.113", "layer.114", "layer.115", "layer.116", "layer.117",
>>>>        "layer.118", "layer.119", "layer.120", "layer.121", "layer.122",
>>>>        "layer.123", "layer.124", "layer.125", "layer.126", "layer.127",
>>>>        "layer.128", "layer.129", "layer.130", "layer.131", "layer.132",
>>>>        "layer.133", "layer.134", "layer.135", "layer.136", "layer.137",
>>>>        "layer.138"))
>>>> I started with the following to generate the first regression line and
>>>> scatter plot:    lm<-ggplot(onepctCO2MEDIAN) +
>>>> geom_jitter(aes(RCP1pctCO2cumulativeMedian[1:138], departurea),
>>>>        colour="blue") +
>> geom_smooth(aes(RCP1pctCO2cumulativeMedian[1:138],
>>>>        departurea), method=lm)
>>>> But I receive this error:    Warning message:
>>>>        Computation failed in `stat_smooth()`:
>>>>        'what' must be a function or character string
>>>> A blue scatter plot is successfully generated, but the problem is that
>>>> the regression line does not appear, presumably related to the above
>>>> warning.
>>>> Is there a reason for this? I would appreciate any assistance!
>>>>        [[alternative HTML version deleted]]
>>>>
>>>> ______________________________________________
>>>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>>> PLEASE do read the posting guide
>>>> http://www.R-project.org/posting-guide.html
>>>> and provide commented, minimal, self-contained, reproducible code.
>>
>> ______________________________________________
>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.



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