替换列中的值

Question

一列具有不同的值，其中一个包含值Array ( [4] => 4 [5] => 1 [7] => 2 [8] => 1 [9] => 1 [3] => 1 ) 。 我想将其替换为If DirectRB.Checked Then 'introRange.Delete() 'Dim ODirect_intropara As Word.Paragraph = oDoc.Paragraphs.Add() 'ODirect_intropara.Range.Font.Name = "Arial Narrow" 'ODirect_intropara.Range.Font.Bold = CInt(False) 'ODirect_intropara.Range.Font.Size = 11 'ODirect_intropara.Format.SpaceAfter = 0 'ODirect_intropara.Range.Text = Direct_introduction 'ODirect_intropara.Range.ParagraphFormat.Alignment = Microsoft.Office.Interop.Word.WdParagraphAlignment.wdAlignParagraphLeft 'ODirect_intropara.Range.InsertParagraphAfter() introPara = oDoc.Content.Paragraphs.Add introPara.Range.Text = Direct_introduction introPara.Range.Font.Bold = True introPara.Format.SpaceAfter = 24 '24 pt spacing after paragraph. introPara.Range.InsertParagraphAfter() Rng = oDoc.Range(oDoc.Range.Characters.Count - 1, oDoc.Range.Characters.Count) Rng.InsertAfter(vbCrLf & "More text inserted using the range object") ElseIf PartnerRB.Checked Then MessageBox.Show("you checked Partner") End If 。

数据看起来像这样： 关口     F     F     G     H     *     Ť     *

我

我尝试了以下选项：

*

两者都不起作用

Answer 1

replace需要知道要替换的元素（x == "*"）：

x <- c("*", "a", "*", "a", "*", "a", "*", "a", "B")
replace(x, x == "*", "U")
#[1] "U" "a" "U" "a" "U" "a" "U" "a" "B"

在data.frame

df <- data.frame(x = x, stringsAsFactors = F)
df[df$x == "*", "x"] <- "U"

Answer 2

不确定*在数据框中出现的频率，但是您可以使用gsub替换它的所有实例。

假设您有一列这样的内容：

df <- c("asd*asd", "432*432", "*")
[1] "asd*asd" "432*432" "*" 

如果要将所有*替换为U，则可以运行此

gsub("\\*", "U", df)
[1] "asdUasd" "432U432" "U"   

由于*是一个特殊字符，因此您必须使用\\对其进行转义，否则它将无法为您提供所需的内容。