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Add the mse loss. (#723)

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This commit is contained in:
Laurent Mazare
2023-09-03 11:51:40 +02:00
committed by GitHub
parent 84d003ff53
commit 74a82c358a
2 changed files with 9 additions and 0 deletions
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4
candle-core/src/tensor.rs
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@ -1370,6 +1370,10 @@ impl Tensor {
self.sum(dims) self.sum(dims)
} }
pub fn mean_all(&self) -> Result<Tensor> {
self.sum_all()? / self.elem_count() as f64
}
fn flatten_<D1: Dim, D2: Dim>( fn flatten_<D1: Dim, D2: Dim>(
&self, &self,
start_dim: Option<D1>, start_dim: Option<D1>,

5
candle-nn/src/loss.rs
View File

@ -43,3 +43,8 @@ pub fn cross_entropy(inp: &Tensor, target: &Tensor) -> Result<Tensor> {
let inp = crate::ops::log_softmax(inp, 1)?; let inp = crate::ops::log_softmax(inp, 1)?;
nll(&inp, target) nll(&inp, target)
} }
/// The mean squared error loss.
pub fn mse(inp: &Tensor, target: &Tensor) -> Result<Tensor> {
(inp - target)?.sqr()?.mean_all()
}