To replace a substring within a string in MATLAB, you can use the replace function. The syntax is:
newStr = replace(str, oldSubstr, newSubstr)
Here, str is the original string, oldSubstr is the substring you want to replace, and newSubstr is the substring you want to replace it with. The function returns newStr, which is the updated string.
Here are some examples:
Example 1: Replace a single occurrence of a substring
>> str = 'The quick brown fox jumps over the lazy dog';
>> newStr = replace(str, 'fox', 'cat')
newStr =
'The quick brown cat jumps over the lazy dog'
In this example, we are replacing the first occurrence of the substring 'fox' with 'cat'.
Example 2: Replace all occurrences of a substring
>> str = 'abracadabra';
>> newStr = replace(str, 'a', 'e')
newStr =
'ebrecedebre'
In this example, we are replacing all occurrences of the substring 'a' with 'e'.
Example 3: Replace a substring with multiple characters
>> str = 'The quick brown dog jumps over the lazy dog';
>> newStr = replace(str, 'dog', 'cat and mouse')
newStr =
'The quick brown cat and mouse jumps over the lazy cat and mouse'
In this example, we are replacing all occurrences of the substring 'dog' with the phrase 'cat and mouse', which contains more than one character.