endsWith

Determine if strings end with pattern

Syntax

TF = endsWith(str,pat)

TF = endsWith(str,pat,'IgnoreCase',true)

Description

TF = endsWith(str,pat) returns 1 (true) if str ends with the specified pattern, and returns 0 (false) otherwise.

If pat is an array containing multiple patterns, then endsWith returns 1 if it finds that str ends with any element of pat.

TF = endsWith(str,pat,'IgnoreCase',true) ignores case when determining if str ends with pat.

Examples

Detect Text at End of String

Create a string array that contains file names. Determine which file names end with the .gz extension.

str = ["abstract.docx","data.tar.gz","mycode.m"; ...
       "data-analysis.ppt","results.ptx","temp-archive.gz"]

str = 2x3 string
    "abstract.docx"        "data.tar.gz"    "mycode.m"       
    "data-analysis.ppt"    "results.ptx"    "temp-archive.gz"

Return a logical array where the position of each element equal to 1 corresponds to the position of a string in str that ends with .gz.

pat = ".gz";
TF = endsWith(str,pat)

TF = 2x3 logical array

   0   1   0
   0   0   1

Display the file names that end with .gz. Index back into str using TF.

str(TF)

ans = 2x1 string
    "data.tar.gz"
    "temp-archive.gz"

Detect File Extensions Using Patterns

Create a string array of file and folder names, where some names have extensions.

str = ["abstract.docx","data.tar.gz","REPORTS"; ...
       "data-analysis.ppt","results.ptx","ARCHIVE"]

str = 2x3 string
    "abstract.docx"        "data.tar.gz"    "REPORTS"
    "data-analysis.ppt"    "results.ptx"    "ARCHIVE"

To find names that end with extensions, create a pattern that matches a period followed by letters by using the lettersPattern function. (You can build up a complex pattern by combining simple patterns in expressions. Such expressions can also include literal text, like "." in this example.)

pat = "." + lettersPattern

pat = pattern
  Matching:

    "." + lettersPattern

Return a logical array indicating which names end with extensions.

TF = endsWith(str,pat)

TF = 2x3 logical array

   1   1   0
   1   1   0

Display the matching names.

str(TF)

ans = 4x1 string
    "abstract.docx"
    "data-analysis.ppt"
    "data.tar.gz"
    "results.ptx"

Find the names with extensions that are exactly three letters long.

pat = "." + lettersPattern(3);
TF = endsWith(str,pat);
str(TF)

ans = 2x1 string
    "data-analysis.ppt"
    "results.ptx"

For a list of functions that create pattern objects, see pattern.

Test End of String Against Multiple Extensions

Create a string array that contains file names. Determine which file names end with the .docx, .xlsx, or .gz extensions.

str = ["data.tar.gz","mycode.m","outputs.xlsx","results.pptx"]

str = 1x4 string
    "data.tar.gz"    "mycode.m"    "outputs.xlsx"    "results.pptx"

pat = [".docx",".xlsx",".gz"];
TF = endsWith(str,pat)

TF = 1x4 logical array

   1   0   1   0

Display the file names that end with .docx, .xlsx, or .gz. Index back into str using TF.

str(TF)

ans = 1x2 string
    "data.tar.gz"    "outputs.xlsx"

Ignore Case When Testing End of String

Create a string array that contains file names. Determine which file names end with the .gz extension, ignoring case.

str = ["DATA.TAR.GZ","mycode.m","SUMMARY.PPT","tmp.gz"]

str = 1x4 string
    "DATA.TAR.GZ"    "mycode.m"    "SUMMARY.PPT"    "tmp.gz"

pattern = ".gz";
TF = endsWith(str,pattern,'IgnoreCase',true)

TF = 1x4 logical array

   1   0   0   1

Display the file names that end with .gz. Index back into str using TF.

str(TF)

ans = 1x2 string
    "DATA.TAR.GZ"    "tmp.gz"

Determine If Character Vector Ends with Extension

Create a character vector that contains the name of a file. Determine whether the name ends with specified extensions.

chr = 'MyLatestPaper.docx'

chr = 
'MyLatestPaper.docx'

TF = endsWith(chr,'docx')

TF = logical
   1

TF = endsWith(chr,'gz')

TF = logical
   0

Input Arguments

str — Input text

string array | character vector | cell array of character vectors

Input text, specified as a string array, character vector, or cell array of character vectors.

pat — Search pattern

string array | character vector | cell array of character vectors | pattern array (since R2020b)

Search pattern, specified as one of the following:

• String array

• Character vector

• Cell array of character vectors

• pattern array (since R2020b)

Extended Capabilities

Tall Arrays

Calculate with arrays that have more rows than fit in memory.

The endsWith function fully supports tall arrays. For more information, see Tall Arrays.

C/C++ Code Generation

Generate C and C++ code using MATLAB® Coder™.

Usage notes and limitations:

• str and pat must be a string scalar, a character vector, or a cell array containing not more than one character vector.

Thread-Based Environment

Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.

Distributed Arrays

Partition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™.

This function fully supports distributed arrays. For more information, see Run MATLAB Functions with Distributed Arrays (Parallel Computing Toolbox).

Version History

Introduced in R2016b