r - 绘制表格并为列中的最小值着色

Question

我有一个如下的数据框。

                              RMSE      MAE        MPE     MAPE
ARIMA(1, 1, 0)(1, 1, 1)23 540.4890 362.6894 -1.2617083 8.273222
ARIMA(1, 0, 0)(1, 1, 1)23 550.7088 373.4725 -0.9303624 8.523295
ARIMA(1, 1, 0)(2, 1, 1)23 539.1094 360.4556 -1.2885436 8.220159
ARIMA(2, 0, 0)(1, 1, 1)23 547.4179 366.4258 -0.9816881 8.374072
ARIMA(1, 0, 0)(2, 1, 1)23 548.6216 372.1675 -0.9249135 8.494618

我想将其绘制为表格，并希望为每一行中具有最小值的颜色。这样我就可以看到哪个模型在错误值方面给出了更好的结果。我找不到这样做的简单方法。该表将通过 R.Net 上传到网站。我试过这个例子，但我什至没有通过第一部分。

# load Systematic Investor Toolbox
setInternet2(TRUE)
source(gzcon(url('https://github.com/systematicinvestor

---

数据：

structure(list(RMSE = c(540.489, 550.7088, 539.1094, 547.4179, 
548.6216), MAE = c(362.6894, 373.4725, 360.4556, 366.4258, 372.1675
), MPE = c(-1.2617083, -0.9303624, -1.2885436, -0.9816881, -0.9249135
), MAPE = c(8.273222, 8.523295, 8.220159, 8.374072, 8.494618)), .Names = 
c("RMSE", 
"MAE", "MPE", "MAPE"), class = "data.frame", row.names = c("ARIMA(1,1,0)(1,1,1)23", 
"ARIMA(1,0,0)(1,1,1)23", "ARIMA(1,1,0)(2,1,1)23", "ARIMA(2,0,0)(1,1,1)23", 
"ARIMA(1,0,0)(2,1,1)23"))

Answer 1

让dat成为您的数据框，您可以执行以下操作：

## colour setting for each row / model
col_set <- 1:5

## do matrix plot; extend `xlim` to the right to reserve space for legend
matplot(y = t(dat), xaxt = "n", pch = 19, col = col_set,
        xlab = "", ylab = "Error", xlim = c(1, ncol(dat)+2L))
axis(1L, seq_len(ncol(dat)), colnames(dat))

## add legend at top right corner
legend("topright", legend = rownames(dat), pch = 19, col = col_set)

## highlight the column minimum
points(seq_len(ncol(dat)), unlist(lapply(dat, min)), cex = 2, pch = 19,
       col = col_set[unlist(lapply(dat, which.min))])

---

正如您所观察到的，如果不重新缩放，图形表示效果很差。我们现在将所有列缩放[0, 1]并制作绘图。

dat <- "rownames<-"(do.call(cbind.data.frame, lapply(dat, function (u) (u - min(u)) / diff(range(u)))),
                    rownames(dat))
#                           RMSE       MAE        MPE      MAPE
#ARIMA(1,1,0)(1,1,1)23 0.1189372 0.1716077 0.07379835 0.1750468
#ARIMA(1,0,0)(1,1,1)23 1.0000000 1.0000000 0.98501527 1.0000000
#ARIMA(1,1,0)(2,1,1)23 0.0000000 0.0000000 0.00000000 0.0000000
#ARIMA(2,0,0)(1,1,1)23 0.7162870 0.4586499 0.84386716 0.5077358
#ARIMA(1,0,0)(2,1,1)23 0.8200597 0.8997457 1.00000000 0.9053989

然后使用前面的代码，我们有