字符的串连矢量中的R

在本文中，我们将讨论如何在 R 编程语言中连接出现在两个或多个向量中的字符串。

下面讨论了这样做的各种方法。

方法 1：使用 paste()

paste()函数用于组合传递给它的向量中存在的字符串作为参数。

Syntax: paste(vector1,vector2,.,vector n,sep=”symbol”)

Parameter:

• vectors are the input vectors to be concatenate
• sep is the separator symbol that separates the strings present in the vector.

示例 1：

R

# create a vector with character
# strings(names)
a=c("manoj","sravan","harsha")
 
# create a vector with character
# strings (address)
b=c("vijayawada","ponnur","hyd")
 
# concatenate these two vectors
# using paste function
print(paste(a,b,sep="--"))

输出：

[1] “manoj–vijayawada” “sravan–ponnur”    “harsha–hyd” 

示例 2：

电阻

# create a vector with character
# strings(names)
a=c("manoj","sravan","harsha")
 
# create a vector with character
# strings (address)
b=c("vijayawada","ponnur","hyd")
 
# create a vector with character
# strings(subjects)
d=c("java",".net","python")
 
# create a vector with character
# strings (college)
e=c("iit","srm-ap","vignan")
 
# create a vector with character
# strings(department)
f=c("cse","food tech","ece")
 
# concatenate these five vectors
# using paste function
print(paste(a,b,d,e,f,sep="--"))

输出：

[1] "manoj--vijayawada--java--iit--cse"      
[2] "sravan--ponnur--.net--srm-ap--food tech"
[3] "harsha--hyd--python--vignan--ece"       

如果没有分隔符，向量将在没有任何空格或任何符号的情况下组合。

示例 3：

电阻

# create a vector with character
# strings(names)
a=c("manoj","sravan","harsha")
 
# create a vector with character
# strings (address)
b=c("vijayawada","ponnur","hyd")
 
# create a vector with character
# strings(subjects)
d=c("java",".net","python")
 
# create a vector with character
# strings (college)
e=c("iit","srm-ap","vignan")
 
# create a vector with character
# strings(department)
f=c("cse","food tech","ece")
 
# concatenate these five vectors
# using paste function
print(paste(a,b,d,e,f))

输出：

[1] “manoj vijayawada java iit cse”       “sravan ponnur .net srm-ap food tech”

[3] “harsha hyd python vignan ece”    

方法 2：使用 cbind()

cbind()函数用于按列组合向量，即它将第一个向量放在第一列中，将第二个向量放在第 2 列中，依此类推。

Syntax: cbind(x1, x2, …, deparse.level = 1)

Parameters:
x1, x2: vector, matrix, data frames
deparse.level: This value determines how the column names generated. The default value of deparse.level is 1.

例子：

电阻

# create a vector with character
# strings(names)
a=c("manoj","sravan","harsha")
 
# create a vector with character
# strings (address)
b=c("vijayawada","ponnur","hyd")
 
# create a vector with character
# strings(subjects)
d=c("java",".net","python")
 
# create a vector with character
# strings (college)
e=c("iit","srm-ap","vignan")
 
# create a vector with character
# strings(department)
f=c("cse","food tech","ece")
 
# concatenate these five vectors
# using cbind function
print(cbind(a,b,d,e,f))

输出：

              a                 b           d        e        f          

[1,] “manoj”  “vijayawada” “java”   “iit”    “cse”      

[2,] “sravan” “ponnur”     “.net”   “srm-ap” “food tech”

[3,] “harsha” “hyd”        “python” “vignan” “ece”      

方法 3：使用rbind()

rbind() 按行连接向量字符串，即第 1 行是向量 1，第 2 行是向量 2，依此类推。

Syntax: rbind(x1, x2, …, deparse.level = 1)

Parameters:
x1, x2: vector, matrix, data frames
deparse.level: This value determines how the column names generated. The default value of deparse.level is 1.

例子：

电阻

# create a vector with character
# strings(names)
a=c("manoj","sravan","harsha")
 
# create a vector with character
# strings (address)
b=c("vijayawada","ponnur","hyd")
 
# create a vector with character
# strings(subjects)
d=c("java",".net","python")
 
# create a vector with character
# strings (college)
e=c("iit","srm-ap","vignan")
 
# create a vector with character
# strings(department)
f=c("cse","food tech","ece")
 
# concatenate these five vectors
# using rbind function
print(rbind(a,b,d,e,f))

输出：

[,1]         [,2]        [,3]    
a "manoj"      "sravan"    "harsha"
b "vijayawada" "ponnur"    "hyd"    
d "java"       ".net"      "python"
e "iit"        "srm-ap"    "vignan"
f "cse"        "food tech" "ece"  

方法四：使用 cat()

cat()函数用于连接给定的向量。

句法：

cat(vector1,vector2,.,vector n)

其中，向量是输入向量

它产生一个一维向量，最后一个值为 NULL

示例 1：

电阻

# create a vector with character
# strings(names)
a=c("manoj","sravan","harsha")
 
# create a vector with character
# strings (address)
b=c("vijayawada","ponnur","hyd")
 
# concatenate these two vectors
# using cat function
print(cat(a,b))

输出：

manoj sravan harsha vijayawada ponnur hydNULL

示例 2：

电阻

# create a vector with character
# strings(names)
a=c("manoj","sravan","harsha")
 
# create a vector with character
# strings (address)
b=c("vijayawada","ponnur","hyd")
 
# create a vector with numeric data
d=c(1,2,3,4,5)
 
# create a vector with numeric data
e=c(1.6,2.2,3.78,4.4456,5.4)
 
# concatenate these four vectors using
# cat function
print(cat(a,b,d,e))

输出：

manoj sravan harsha vijayawada ponnur hyd 1 2 3 4 5 1.6 2.2 3.78 4.4456 5.4NULL