How to replace a word with another word in a cell array (case insensitive)

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gmltn1212 2020-7-16

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评论： gmltn1212 2020-7-16

采纳的回答： Stephen23

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Hi I am trying to replace words found in a string with a given value (case insensitive)

str = 'lemon lemontea Lemongrass lime';
replaceword = 'lemon' %case insensitive
withthis = {'berry', 'apple', 'flower'};

Assume that we will be given with enough number of words to replace all the occurance of the word

I want to return this:

newstr = 'berry appletea flowergrass lime';

I tried to use strrep but it would replace for Lemon...

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Stephen23 2020-7-16

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编辑：Stephen23 2020-7-16

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Method one: loop and regexprep:

for k = 1:numel(withthis)
    str = regexprep(str,replaceword,withthis{k},'once','ignorecase');
end

Method two: regexpi and indexing:

>> spl = regexpi(str,replaceword,'split');
>> spl(2,1:end-1) = withthis;
>> str = sprintf('%s',spl{:})
str =
berry appletea flowergrass lime

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Stephen23 2020-7-16

编辑：Stephen23 2020-7-16

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Because one of the withthis words includes the very substring that you are replacing you will have to use the second method, for example:

>> replaceword = 'ye';
>> withthis = {'HELLO','BYE','MEOW'};
>> str = fileread('cartiSnapping.txt');
>> spl = regexp(str,replaceword,'split','ignorecase');
>> spl(2,1:end-1) = withthis;
>> str = sprintf('%s',spl{:})
str =
I got a lot on my mind HELLOah
I got a lot on my mind huh BYEah
I got a lot on my mind huh Whoa
She got a lot on her mind ooh
She got a lot on her mind ooh MEOWah
I got a lot on my mind ooh
I got a lot on my mind