Logical Vectors From Values
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From: james bejon on 30 Mar 2010 19:40 Very nice, Oleg. Silly solutions are a lot more fun.
From: dpb on 30 Mar 2010 19:41 Oleg Komarov wrote: .... >> But if you have logical() at your disposal, then you could use >> >> o(x) = logical(1); >> .... Indeedy, do...very good (and why didn't _I_ think of it??? :( )... :) --
From: dpb on 30 Mar 2010 19:42 Matt Fig wrote: > dpb <none(a)non.net> wrote in message > <hotrs9$qbg$1(a)news.eternal-september.org>... >> Nathan wrote: >> ... >> >> > If you were going to do that, why not just make it logical in the >> > first place? >> > > o(x) = true; >> >> Primarily because... >> >> >> which true >> true not found. >> >> help true >> >> true.m not found. >> >> >> >> >> :( >> >> -- > > > Of course, you could fix that! > > function T = true(N) > % Hacky-TRUE > T = ~zeros(N); true(aye-that); --
From: dpb on 30 Mar 2010 19:43 Walter Roberson wrote: > dpb wrote: >> james bejon wrote: >>> Dear All, Is there a neat way of getting from, say, >>> >>> [3, 5, 8] >>> >>> to >>> >>> [0, 0, 1, 0, 1, 0, 0, 1]? >> >> Alternately, >> >> o(x)=1; % create the 0/1 vector >> l = logical(o); % turn it into a logical one >> >> Too bad for things like this ML doesn't support nested assignment.. >> >> l = logical(o(x)=1); % Doesn't work, of course... :( > > Well, if you are going to be like that! > > l = any(bsxfun(@eq,1:max(x),x.')); Chuckle... --
From: us on 30 Mar 2010 19:54
dpb > > l = any(bsxfun(@eq,1:max(x),x.')); > Chuckle... this is NOT funny - this is sheer, cruel abuse of ML syntax... us |