help with plz

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Nasir Qazi
Nasir Qazi 2012-3-4
% Note :- in this code y & x has 10 values, but every time I run % the command it will give me this error... %*(??? Operands to the and && operators must be convertible to logical scalar values.)*
Error in ==> dewpointT at 75 if (abs(raw(1)) < 1e-5 && abs((y./K)-x) < 1e-5)
raw(1)= sum(y./K)-1;
if (abs(raw(1)) < 1e-5 && abs((y./K)-x) < 1e-5)
break
  1 个评论
Jan
Jan 2012-3-4
Please use a meaningful subject line and tags.

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采纳的回答

Titus Edelhofer
Titus Edelhofer 2012-3-4
Hi,
if y and x are vectors, then abs((y./K)-x)<1e-5) is a (logical) vector as well. You will need to decide, if the relation must hold for at least one index, or for all of them. Replace by
any(abs((y./K)-x)<1e-5))
or
all(abs((y./K)-x)<1e-5) )
accordingly.
Titus

更多回答（1 个）

Jan
Jan 2012-3-4
The error message is very clear: "Operands to and && operators must be convertible to logical scalar values." It is always worth to read the error messages of Matlab.
  2 个评论
Nasir Qazi
Nasir Qazi 2012-3-5
it works with '&' instead of '&&'
Walter Roberson
Walter Roberson 2012-3-5
Nasir, it doesn't bomb out with an error if you change to &, but that doesn't mean that it works. Please review Titus's response and study the documentation for "any" and "all"

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