# Function spirv_std::arch::ddx_vector

source · ```
pub fn ddx_vector<F: Float, VECTOR: Vector<F, LENGTH>, const LENGTH: usize>(
component: VECTOR
) -> VECTOR
```

## Expand description

Returns the partial derivative of `component`

with respect to the window’s X
coordinate. Returns the same result as either `ddx_fine`

or
`ddx_coarse`

, selection of which one is dependent on external factors.