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Mesh: Difference between revisions
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Bernecky's paper
(APL models) |
(Bernecky's paper) |
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|<math>\backslash{}a,u,b\backslash</math> | |<math>\backslash{}a,u,b\backslash</math> | ||
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In [[Iverson notation]], '''Mesh''' (<math>\backslash{}a,u,b\backslash</math>) is a three-argument operation which merges two equal-[[rank]] arguments according to a [[Boolean]] [[vector]]. The relationship between [[Mask]] and Mesh is similar to that between [[Compress]] and [[Expand]]. A related function also named Mesh is implemented in [[NARS]] and [[NARS2000]] as a case of [[Compose]]: <source lang=apl inline>L(a∘\)R</source> combines <source lang=apl inline>L</source> and <source lang=apl inline>R</source> using an integer (not Boolean) control vector. | In [[Iverson notation]], '''Mesh''' (<math>\backslash{}a,u,b\backslash</math>) is a three-argument operation which merges two equal-[[rank]] arguments according to a [[Boolean]] [[vector]]. The relationship between [[Mask]] and Mesh is similar to that between [[Compress]] and [[Expand]]. A related function also named Mesh is implemented in [[NARS]] and [[NARS2000]] as a case of [[Compose]]: <source lang=apl inline>L(a∘\)R</source> combines <source lang=apl inline>L</source> and <source lang=apl inline>R</source> using an integer (not Boolean) control vector. [[Bob Bernecky]] has suggested the syntax <source lang=apl inline>a(u\)b</source> (requiring [[Expand]] to be an [[operator]]) for <math>\backslash{}a,u,b\backslash</math>.<ref>[[Bob Bernecky|Bernecky, Robert]]. "Mask and Mesh Revisited". [[APL2010]].</ref> | ||
== In Iverson notation == | == In Iverson notation == | ||