what is the purpose of the @ symbol in front of a variable in octave?

Question

For example:

model = svmTrain(X, y, C, @(x1, x2) gaussianKernel(x1, x2, sigma)); 

Disclaimer: This is from the Coursera ML class, but it's nearly impossible to search for the @ symbol conventionally.

Answer 1

Also, @ is used to demark a function handle.

Answer 2

@ prefixes the definition of an anonymous function.