Question

当我在wordcloud包中使用textplot（）函数标记图形中的点（PCA）时，我收到错误。

错误是：Error in match.arg(halign) : 'arg' must be NULL or a character vector

以下是x和y变量：

> pca1$li
         Axis1       Axis2
01 -26.3659354  18.0330276
02 -19.3576309 -18.9132485
03 -27.2273522   3.3373583
04 -23.0849100   0.9764428
05   8.1548417  29.4034493
06  14.9676626  -8.4668479
07  -9.2283936   4.5088119
08  17.9377761 -11.3030900
09  -0.8272139   2.3342824
10  30.3111878  18.8577228
11   2.0019239  -6.2150041
12  22.2964319  34.6544348
13  25.4172737 -39.6409997
14   4.4278974  -5.5672158
15   4.2769304 -11.4208116
16  19.2807143  -7.9307193
17   5.1918409  -5.2005851
18 -17.6999115 -26.7897873
19 -15.5909519   6.0809629
20  -3.6095312   1.2653160
21 -12.7500774   8.5864060
22   1.4774272  13.4100946

文本（我在这里称之为标签）应该是一个字符向量，我确定：

> labels
 [1] "Vipond Park"     "Little Joe"      "Napa Sunset"     "Deadline"        "Deschutes"       "Gifford Pinchot"
 [7] "Mount Hood"      "Okanogan"        "Warm Springs"    "Colville"        "Wenatchee"       "Olympic"        
[13] "Smithers"        "Mount Stevens"   "Jesmond"         "McBridePeak"     "Cataract"        "Prairie Bluff"  
[19] "Tom Beal"        "Humboldt"        "Warner"          "Goosenest"      

> class(labels)
[1] "character"

以下是绘制细节（我添加了超过必要的信息，因为我有时会绘制更多数据点）：

> myPch <- c(18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+           18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18)
> 
> myCol <- transp(c("blue","red","darkgreen","black","purple","blue","red","darkgreen","black","purple",
+    "blue","red","darkgreen","black","purple", "blue","red","darkgreen","black","purple", "blue","red",
+      "darkgreen","black","purple", "blue","red","darkgreen","black","purple", "blue","red","darkgreen",
+      "black","purple", "blue","red","darkgreen","black","purple","blue","red","darkgreen","black","purple", 
+       "blue","red","darkgreen","black","purple","blue","red","darkgreen","black","purple", "blue","red",
+       "darkgreen","black","purple","blue","red","darkgreen","black","purple"),1)
> 
> 
>

我绘制数据：

> plot(pca1$li, col=myCol, cex=3, pch=myPch)

> abline(h=0,v=0,col="grey",lty=2)

然后我将标签添加到图中，但我得到以下错误。

> textplot(pca1$li[,1], pca1$li[,2], words = labels, cex=1.4, new=FALSE)
Error in match.arg(halign) : 'arg' must be NULL or a character vector
>

Answer 1

您获得的错误是由于textplot函数使用的语法不正确：

textplot(object, halign=c("center","left","right"),
     valign=c("center", "top", "bottom"), cex, ... )

在你的例子中，＆＃34;对象＆＃34;参数以pca1 $ li [，1]给出，而＆＃34; halign＆＃34;给出为pca1 $ li [，2]。

因为＆＃34; halign＆＃34;只接受＆＃34; center＆＃34;，＆＃34; left＆＃34;或＆＃34;对＆＃34;，给出pca $ li [，2]的错误参数将返回错误消息。

wordcloud中的textplot出错

1 个答案: