String replacement in MATLAB

Introduction

String replacement helps you change parts of text easily, like fixing typos or updating words.

You want to correct a misspelled word in a sentence.

You need to update a date or name inside a text message.

You want to remove or replace certain characters from user input.

You want to change all occurrences of a word in a paragraph.

You want to format text by replacing placeholders with actual values.

Syntax

MATLAB

newStr = strrep(originalStr, oldSubstr, newSubstr);

strrep replaces all occurrences of oldSubstr with newSubstr in originalStr.

The function is case-sensitive and works on character arrays or string arrays.

Examples

Replaces 'world' with 'friend' resulting in 'hello friend'.

MATLAB

newStr = strrep('hello world', 'world', 'friend');

Replaces all 'a' letters with 'o', resulting in 'bonono'.

MATLAB

newStr = strrep('banana', 'a', 'o');

Changes 'fun' to 'great' in the sentence.

MATLAB

newStr = strrep('Matlab is fun', 'fun', 'great');

Sample Program

This program replaces every 'apples' with 'oranges' in the sentence and shows the new sentence.

MATLAB

originalStr = 'I love apples and apples are tasty.';
newStr = strrep(originalStr, 'apples', 'oranges');
disp(newStr);

Important Notes

strrep replaces all matches, not just the first one.

If oldSubstr is not found, the original string is returned unchanged.

Use double quotes for string arrays or single quotes for character arrays in MATLAB.

Summary

String replacement changes parts of text easily.

Use strrep(originalStr, oldSubstr, newSubstr) to replace all occurrences.

It works on both character arrays and string arrays.