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torch.Tensor.Tensor.logical_xor_

Tensor.logical_xor_(other: Tensor): this

In-place element-wise logical XOR.

Computes the logical XOR (exclusive OR) between two boolean tensors element-wise. Returns true when inputs differ (one true, one false). Useful for toggle operations and finding differences between boolean masks.

Use Cases:

  • Toggle between boolean states based on another condition
  • Finding symmetric difference of two boolean masks
  • Detecting changes or mismatches between conditions
XOR(a,b)={trueif a≠bfalseif a=b\begin{aligned} \text{XOR}(a, b) = \begin{cases} \text{true} & \text{if } a \neq b \\ \text{false} & \text{if } a = b \end{cases} \end{aligned}XOR(a,b)={truefalse​if a=bif a=b​​
  • Broadcasting: Both tensors are broadcast to compatible shapes
  • Boolean tensors: Both inputs must be boolean tensors
  • In-place: Modifies this tensor directly and returns it for chaining
  • Symmetry: XOR is symmetric: a XOR b = b XOR a
  • Self-canceling: a XOR a = false always

Parameters

otherTensor
The other tensor (will be broadcast if needed)

Returns

this– This tensor modified in-place

Examples

// Find differing values between two boolean masks
const mask1 = torch.tensor([true, true, false, true]);
const mask2 = torch.tensor([true, false, false, true]);
mask1.logical_xor_(mask2);  // [false, true, false, false]

// Symmetric difference - values in either range but not both
const x = torch.tensor([0, 2, 7, 3, 9]);
const inFirst = x.gt(0).logical_and(x.lt(4));  // [2, 3]
const inSecond = x.gt(5).logical_and(x.lt(10)); // [7, 9]
const symmetric = inFirst.logical_xor(inSecond); // [true for 2, 3, 7, 9]

// Toggle condition based on another mask
const predictions = torch.tensor([true, true, false, true]);
const hasError = torch.tensor([false, true, false, false]);
predictions.logical_xor_(hasError);  // Flip where there are errors

See Also

  • PyTorch tensor.logical_xor_()
  • logical_and_ - Element-wise logical AND
  • logical_or_ - Element-wise logical OR
  • logical_not_ - Element-wise logical NOT
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