explain the @ function in matlab

In MATLAB, the @ symbol is used to create anonymous functions. Anonymous functions can be defined inline, meaning that they can be defined where they are used in an expression rather than in a separate function file.

The general syntax to create an anonymous function is @(arg1, arg2,...)expression.

For example, to create an anonymous function that squares its input, we can write:

main.m
square = @(x) x^2;
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This defines a function called square that takes a single input argument x and returns x^2. We can then call the square function with a value for x:

main.m
>> square(3)
ans =
     9
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Anonymous functions are very useful when we need to pass a small function as an argument to another function, or when we need to define a function that is used only once.