Create a character vector and replace a substring within it.

chr ='The quick brown fox'

chr = 'The quick brown fox'

newChr = strrep(chr,'quick','sly')

newChr = 'The sly brown fox'

Create a string array. Starting in R2017a, you can create strings using double quotes instead of thestringfunction.

str = ["the quick brown fox";"and the lazy dog"]

str =2x1 string array"the quick brown fox" "and the lazy dog"

Replace a substring in each element of the array.

newStr = strrep(str,'the','a')

newStr =2x1 string array"a quick brown fox" "and a lazy dog"

Replace placeholder content in a cell array,'___', with different values in a second cell array.

C1 = {'Date Received: ___';'Date Accepted: ___'}; old ='___'; new = {'2016-09-06';'2016-10-11'}; C2 = strrep(C1,old,new)

C2 =2x1 cell array{'Date Received: 2016-09-06'} {'Date Accepted: 2016-10-11'}

Create a character vector with a repeated, overlapping pattern. Compare the results of using thestrrep,replace, andregexprepfunctions to replace the pattern.

repeats ='abc 2 def 22 ghi 222 jkl 2222'

repeats = 'abc 2 def 22 ghi 222 jkl 2222'

Find the indices of the repeating pattern'22'using thestrfindfunction.strfindfinds all instances of the pattern, including instances that overlap.

指数=strfind(repeats,'22')

指数=11 18 19 26 27 28

Replace'22'usingstrrep。When you usestrrep, it replaces every instance identified bystrfind。

using_strrep = strrep(repeats,'22','*')

using_strrep = 'abc 2 def * ghi ** jkl ***'

Replace'22'usingreplace。It does not replace every instance thatstrrepreplaces.

using_replace = replace(repeats,'22','*')

using_replace = 'abc 2 def * ghi *2 jkl **'

Replace'22'usingregexprep。结果是相同的to the results using thereplacefunction.

using_regexprep = regexprep(repeats,'22','*')

using_regexprep = 'abc 2 def * ghi *2 jkl **'

strrepfinds all instances of a pattern before replacing any instance. However, thereplaceandregexprepfunctions replace an instance of a pattern as soon as they find it within the text.