## summingJunction

**Block Category:** Arithmetic

**Inputs: **Real or complex scalars, vectors, or
matrices. When vector and matrix inputs are of unequal lengths, the
summingJunction block defines the output vector or matrix to be the maximum
composite size of all the incoming vectors or matrices and extends all other
incoming vectors and matrices to match the length of the longest incoming vector
or matrix, by padding each of them with the requisite number of 0s.

**Description:** The summingJunction block produces the
sum of two signed input signals. You can toggle the sign by pressing CTRL+right-click over the
connector.