How can you extract multiple fields of a structure matching the same logical index condition?

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Matthew Lawrence
Matthew Lawrence 2017-3-8
回答： Walter Roberson 2017-3-8
Let's say I have a structure point with fields x, y and z. I would like to create a structure subpoint which matches point.z>minz.
I can do: subpoint.x=point.x(point.z>minz); subpoint.y=point.y(point.z>minz); subpoint.z=point.z(point.z>minz);
but I was wondering if there was a way of using logical indexing to all fields implicitly (subpoint=point(point.z>minz) doesn't work).
The reason I'm asking is that in my actual example I have a lot of fields and extracting each one individually is taking a bit of time so I was hoping that a single line equivalent, if it exists, might make things go faster.
Thanks,
Matthew

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Walter Roberson
Walter Roberson 2017-3-8
mask = point.z>minz;
subpoint = structfun(@(F) F(mask), point, 'uniform', 0)

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