使用 facet_wrap 和 scales = "free" 设置单个轴限制在 ggplot2 中 [英] Setting individual axis limits with facet_wrap and scales = "free" in ggplot2
问题描述
我正在创建一个分面图来并排查看预测值与实际值以及预测值与残差的图.我将使用 shiny 来帮助探索使用不同训练参数的建模工作的结果.我用 85% 的数据训练模型，对剩余的 15% 进行测试，然后重复 5 次，每次收集实际/预测值.计算残差后，我的 data.frame 看起来像这样:
I'm creating a facetted plot to view predicted vs. actual values side by side with a plot of predicted value vs. residuals. I'll be using shiny to help explore the results of modeling efforts using different training parameters. I train the model with 85% of the data, test on the remaining 15%, and repeat this 5 times, collecting actual/predicted values each time. After calculating the residuals, my data.frame looks like this:
head(results)
act pred resid
2 52.81000 52.86750 -0.05750133
3 44.46000 42.76825 1.69175252
4 54.58667 49.00482 5.58184181
5 36.23333 35.52386 0.70947731
6 53.22667 48.79429 4.43237981
7 41.72333 41.57504 0.14829173
我想要的:
predvs.act和predvs.resid 的并排图pred与act的 x/y 范围/限制相同，理想情况下从min(min(results$act), min(结果$pred))到max(max(results$act), max(results$pred))pred与resid不 的 x/y 范围/限制不受我对实际和预测的影响阴谋.仅在预测值上绘制x，仅在残差范围上绘制y就可以了.
- Side by side plot of
predvs.actandpredvs.resid - The x/y range/limits for
predvs.actto be the same, ideally frommin(min(results$act), min(results$pred))tomax(max(results$act), max(results$pred)) - The x/y range/limits for
predvs.residnot to be affected by what I do to the actual vs. predicted plot. Plotting forxover only the predicted values andyover only the residual range is fine.
为了并排查看两个图，我融化了数据:
In order to view both plots side by side, I melt the data:
library(reshape2)
plot <- melt(results, id.vars = "pred")
现在绘制:
library(ggplot2)
p <- ggplot(plot, aes(x = pred, y = value)) + geom_point(size = 2.5) + theme_bw()
p <- p + facet_wrap(~variable, scales = "free")
print(p)
这非常接近我想要的:
我想要的是实际与预测的 x 和 y 范围相同，但我不确定如何指定，而且我不需要为预测与残差图完成，因为范围完全不同.
What I'd like is for the x and y ranges for actual vs. predicted to be the same, but I'm not sure how to specify that, and I don't need that done for the predicted vs. residual plot since the ranges are completely different.
我尝试为 scale_x_continous 和 scale_y_continuous 添加类似的东西:
I tried adding something like this for both scale_x_continous and scale_y_continuous:
min_xy <- min(min(plot$pred), min(plot$value))
max_xy <- max(max(plot$pred), max(plot$value))
p <- ggplot(plot, aes(x = pred, y = value)) + geom_point(size = 2.5) + theme_bw()
p <- p + facet_wrap(~variable, scales = "free")
p <- p + scale_x_continuous(limits = c(min_xy, max_xy))
p <- p + scale_y_continuous(limits = c(min_xy, max_xy))
print(p)
但这会提取残差值的 min().
But that picks up the min() of the residual values.
我的最后一个想法是在熔化之前存储最小 act 和 pred 变量的值，然后将它们添加到融合数据框以指示它们出现在哪个方面:
One last idea I had is to store the value of the minimum act and pred variables before melting, and then add them to the melted data frame in order to dictate in which facet they appear:
head(results)
act pred resid
2 52.81000 52.86750 -0.05750133
3 44.46000 42.76825 1.69175252
4 54.58667 49.00482 5.58184181
5 36.23333 35.52386 0.70947731
min_xy <- min(min(results$act), min(results$pred))
max_xy <- max(max(results$act), max(results$pred))
plot <- melt(results, id.vars = "pred")
plot <- rbind(plot, data.frame(pred = c(min_xy, max_xy),
variable = c("act", "act"), value = c(max_xy, min_xy)))
p <- ggplot(plot, aes(x = pred, y = value)) + geom_point(size = 2.5) + theme_bw()
p <- p + facet_wrap(~variable, scales = "free")
print(p)
这就是我想要的，除了点也出现了:
That does what I want, with the exception that the points show up, too:
对于做这样的事情有什么建议吗?
Any suggestions for doing something like this?
我看到了 这个想法 添加geom_blank()，但我不确定如何指定aes() 位并使其正常工作，或者geom_point() 等效于 aes(y = max(..count..)) 的直方图使用.
I saw this idea to add geom_blank(), but I'm not sure how to specify the aes() bit and have it work properly, or what the geom_point() equivalent is to the histogram use of aes(y = max(..count..)).
以下是可使用的数据(我在熔化前的实际值、预测值和剩余值):
Here's data to play with (my actual, predicted, and residual values prior to melting):
> dput(results)
structure(list(act = c(52.81, 44.46, 54.5866666666667, 36.2333333333333,
53.2266666666667, 41.7233333333333, 35.2966666666667, 30.6833333333333,
39.25, 35.8866666666667, 25.1, 29.0466666666667, 23.2766666666667,
56.3866666666667, 42.92, 41.57, 27.92, 23.16, 38.0166666666667,
61.8966666666667, 37.41, 41.6333333333333, 35.9466666666667,
48.9933333333333, 30.5666666666667, 32.08, 40.3633333333333,
53.2266666666667, 64.6066666666667, 38.5366666666667, 41.7233333333333,
25.78, 33.4066666666667, 27.8033333333333, 39.3266666666667,
48.9933333333333, 25.2433333333333, 32.67, 55.17, 42.92, 54.5866666666667,
23.16, 64.6066666666667, 40.7966666666667, 39.0166666666667,
41.6333333333333, 35.8866666666667, 25.1, 23.2766666666667, 44.46,
34.2166666666667, 40.8033333333333, 24.5766666666667, 35.73,
61.8966666666667, 62.1833333333333, 74.6466666666667, 39.4366666666667,
36.6, 27.1333333333333), pred = c(52.8675013282404, 42.7682474758679,
49.0048248585123, 35.5238560262515, 48.7942868566949, 41.5750416040131,
33.9548164913007, 29.9787449128663, 37.6443975781139, 36.7196211666685,
27.6043278172077, 27.0615724310721, 31.2073056885252, 55.0886903524179,
43.0895814712768, 43.0895814712768, 32.3549865881578, 26.2428426737583,
36.6926037128343, 56.7987490221996, 45.0370788180147, 41.8231642271826,
38.3297859332601, 49.5343916620086, 30.8535641206809, 29.0117492750411,
36.9767968381391, 49.0826677983065, 54.4678549541069, 35.5059204731218,
41.5333417555995, 27.6069075391361, 31.2404889715121, 27.8920960978598,
37.8505531149324, 49.2616631533957, 30.366837650159, 31.1623492639066,
55.0456078770405, 42.772538591063, 49.2419293590535, 26.1963523976241,
54.4080781796616, 44.9796700541254, 34.6996927469131, 41.6227713664027,
36.8449646519306, 27.5318686661673, 31.6641793552795, 42.8198894266632,
40.5769177148146, 40.5769177148146, 29.3807781312816, 36.8579132935989,
55.5617033901752, 55.8097119335638, 55.1041728261666, 43.6094641699075,
37.0674887276681, 27.3876960746536), resid = c(-0.0575013282403773,
1.69175252413213, 5.58184180815435, 0.709477307081826, 4.43237980997177,
0.148291729320228, 1.34185017536599, 0.704588420467079, 1.60560242188613,
-0.832954500001826, -2.50432781720766, 1.98509423559461, -7.93063902185855,
1.29797631424874, -0.169581471276786, -1.51958147127679, -4.43498658815778,
-3.08284267375831, 1.32406295383237, 5.09791764446704, -7.62707881801468,
-0.189830893849219, -2.38311926659339, -0.541058328675241, -0.286897454014273,
3.06825072495888, 3.38653649519422, 4.14399886836018, 10.1388117125598,
3.03074619354486, 0.189991577733821, -1.82690753913609, 2.16617769515461,
-0.088762764526507, 1.47611355173427, -0.268329820062384, -5.12350431682565,
1.5076507360934, 0.124392122959534, 0.147461408936991, 5.34473730761318,
-3.03635239762411, 10.1985884870051, -4.18300338745873, 4.31697391975358,
0.0105619669306023, -0.958297985263961, -2.43186866616734, -8.38751268861282,
1.64011057333683, -6.36025104814794, 0.226415618518729, -4.80411146461488,
-1.1279132935989, 6.33496327649151, 6.37362139976954, 19.5424938405001,
-4.17279750324084, -0.467488727668119, -0.254362741320246)), .Names = c("act",
"pred", "resid"), row.names = c(2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L,
10L, 11L, 12L, 13L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L,
24L, 25L, 26L, 28L, 29L, 30L, 31L, 32L, 33L, 34L, 35L, 36L, 37L,
38L, 39L, 41L, 42L, 43L, 44L, 45L, 46L, 47L, 48L, 49L, 50L, 51L,
52L, 54L, 55L, 56L, 57L, 58L, 59L, 60L, 61L, 62L, 63L, 64L, 65L
), class = "data.frame")
推荐答案
这是一些带有虚拟 geom_blank 层的代码，
Here's some code with a dummy geom_blank layer,
range_act <- range(range(results$act), range(results$pred))
d <- reshape2::melt(results, id.vars = "pred")
dummy <- data.frame(pred = range_act, value = range_act,
variable = "act", stringsAsFactors=FALSE)
ggplot(d, aes(x = pred, y = value)) +
facet_wrap(~variable, scales = "free") +
geom_point(size = 2.5) +
geom_blank(data=dummy) +
theme_bw()
这篇关于使用 facet_wrap 和 scales = "free" 设置单个轴限制在 ggplot2 中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
