Setdiff n intersect question

2014 8 21
1 个回答
回答已采纳
更新时间：2014 8 22
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Hi,
I have two dataset.
1)
  • Shop# - floor#
  • 321 - 4
  • 321 - 2
  • 321 - 3
  • 322 - 0
  • 322 - 2
2)
  • shop# - floor#
  • 322 - 1
  • 322 - 0
  • 322 - 2
if i do intersect of those two, i expect following, but i get just first row. WHy? 3)
  • shop# - floor#
  • 322 - 0
  • 322 - 2

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 采纳的回答

Guillaume
Guillaume 2014-8-21

1 个投票

>> a=[321 4;321 2;321 3;322 0;322 2];
>> b=[322 1;322 0;322 2];
>> intersect(a, b, 'rows')
ans =
322 0
322 2

8 个评论
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Neesha
Neesha 2014-8-21
With 'rows' i get following error
Error using getvarindices (line 25) Unrecognized variable name 'rows'.
Error in dataset/intersect (line 47) avars = getvarindices(a,vars,false);
Matt J
Matt J 2014-8-21
Check for typos, e.g., not enclosing 'rows' in quotes. You should be able to verify by direct copy/paste that Guillaume's code works as shown.
Neesha
Neesha 2014-8-21
i did. Something is wrong with 322, 2 entry. When i type the set in from commandline, it works with 'rows'. When i convert my program data into double and try it with 'rows' it returns only '322, 0' and not the second line ..:(
Guillaume
Guillaume 2014-8-21
Can you paste your program here, then?
Otherwise, it's difficult to say what's wrong with it.
Neesha
Neesha 2014-8-21
yes i understand....but i think i figured. My format was set to shortG so one 2 is 2.995 and the other is 2 i will make take the 'floor' n see if that helps if it does not, i will paste the code
Neesha
Neesha 2014-8-21
ok, so i had to round floor number to get it to work... thanks.
Matt J
Matt J 2014-8-22
@Neesha, if you got it work, you should accept Guillaume's answer
Neesha
Neesha 2014-8-22
i accepted it, but i did not end up using 'rows', it worked without it as problem was coming from somewhere else

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