Use of join function in MATLAB

Catalog

grammar

explain

Example

Merge strings in string array

Combine the elements of the string array with delimiters

Merges an array of strings along a specified dimension

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        join The function is to merge strings .

grammar

newStr = join(str)
newStr = join(str,delimiter)
newStr = join(str,dim)
newStr = join(str,delimiter,dim)

explain

        newStr ​= join(str)  By joining successive elements of the input array , Place a space character between them , So that  str  The text in is merged .str  It can be a string array or a character vector cell array .newStr  The data type of is related to  str  identical .

• If str yes 1×N or N×1 String array or cell array , be newStr Is a string scalar or a cell array containing a character vector .

• If str yes M×N String array or cell array , be newStr yes M×1 String array or cell array .

For any size string array or cell array ,join The size of the edge is not equal to 1 The last str Dimension concatenation element .

        ​newStr  = join(str,delimiter)  take  str  Merge the text in , And in  str  Between the elements of  delimiter  The elements of , Instead of space characters .

         If delimiter Parameters are arrays of different delimiters , and str There are N Elements , be delimiter In the same dimension, there must be N–1 Elements .delimiter The size of other dimensions of must be 1 Or with str The corresponding dimension size of is the same .

​
        newStr = join(str,dim)  take  str  The elements in along the dimension  dim  combined .

        newStr ​= join(str,delimiter,dim)  take  str  The elements in along the dimension  dim  combined , And in  str  Between the elements of  delimiter  The elements of .

Example

Merge strings in string array

         Create an array of strings . from R2017a Start , You can use double quotation marks to create a string .

str = ["Carlos","Sada";
       "Ella","Olsen";
       "Diana","Lee"]


str = 3x2 string
    "Carlos"    "Sada" 
    "Ella"      "Olsen"
    "Diana"     "Lee"  

         Use join Function to merge strings .join Series connection str String in , And place space characters between strings .join Cascade along the second dimension , Because this is the size is not equal to 1 The last dimension of .

newStr = join(str)


newStr = 3x1 string
    "Carlos Sada"
    "Ella Olsen"
    "Diana Lee"

Combine the elements of the string array with delimiters

         Merge the elements in the string array . stay str Insert different text segments between strings in , Not spaces . Create an array of strings . from R2017a Start , You can use double quotation marks to create a string .

str = ["x","y","z";
       "a","b","c"]


str = 2x3 string
    "x"    "y"    "z"
    "a"    "b"    "c"

         Concatenate strings with dashes .

newStr = join(str,"-")


newStr = 2x1 string
    "x-y-z"
    "a-b-c"

         Concatenate strings with symbols , Make the output string represent the equation .delimiters Parameter must be 2×2 Array , because str yes 2×3 Array .

delimiters = [" + "," = ";
              " - "," = "];
newStr = join(str,delimiters)


newStr = 2x1 string
    "x + y = z"
    "a - b = c"

Merges an array of strings along a specified dimension

         Create an array of strings . from R2017a Start , You can use double quotation marks to create a string .

str = ["Carlos","Sada";
       "Ella","Olsen";
       "Diana","Lee"]


str = 3x2 string
    "Carlos"    "Sada" 
    "Ella"      "Olsen"
    "Diana"     "Lee"  

         Merge along the first dimension str String in . By default ,join Function edge size is not equal to 1 The last dimension of the merge string . To merge strings along the first dimension , Please specify it as an additional input parameter .

newStr = join(str,1)

newStr = 1x2 string
    "Carlos Ella Diana"    "Sada Olsen Lee"

Input parameters

str - Input text

         Input text , Specify as string array or character vector cell array .

delimiter - Separator used to join strings

         Separator used to join strings , Specify as character vector 、 Character vector cell array or string array .join The output string array is formed by joining string elements with delimiters .

        join take delimiter All characters in are inserted as literal text , Include escape character sequences .

dim - The dimension along which the string is joined

         Join dimension of string , Specify as a positive integer . If you don't specify dim, The default value is that the size is not equal to 1 The last dimension of .

Output parameters

newStr - The output text

         The output text , Returns as a string array or a character vector cell array .newStr The data type of is the same as the input text , The size of the join dimension is 1.