.. algorithm:: .. summary:: .. relatedalgorithms:: .. properties:: Description ----------- Perform the < (less-than) boolean operation on two MDHistoWorkspaces or a MDHistoWorkspace and a scalar. The output workspace has a signal of 0.0 to mean "false" and a signal of 1.0 to mean "true". Errors are 0. For two MDHistoWorkspaces, the operation is performed element-by-element. For a MDHistoWorkspace and a scalar, the operation is performed on each element of the output. .. categories:: .. sourcelink::