If function in matlab
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I am using the following if function / formula in excel.
=IF(A1>292.5,"NW", IF(A1>247.5,"W", IF(A1>202.5,"SW",IF(A1>157.5,"S",IF(A1>112.5,"SE",IF(A1>67.5,"E",IF(A1>22.5,"NE")))))))
I have written the following code:
for k=1:I
if M16>292.5
fprintf('SW\n')
elseif (M16<292.5>247.5)
fprintf('W\n')
elseif (M16<247.5>202.5)
fprintf('SW\n')
elseif (M16<202.5>157.5)
fprintf('S\n')
elseif (M16<157.5>112.5)
fprintf('SE\n')
elseif (M16<112.5>67.5)
fprintf('E\n')
elseif (M16<67.5>22.5)
fprintf('NE\n')
elseif (M16<22.5>0)
fprintf('N\n')
else
'invalid'
end
end
I am not getting proper result. Can anyone help.
Regards and thanks in advance
2 个评论
Omer Yasin Birey
2019-2-20
What is this double comparisons. Such as
(M16<292.5>247.5)
Obviously 292.5 is greater than 247.5, I don't understand why are you comparing them. And regardless of the correctness of the comparison, I believe each line that has these kind of comparisons will return 0. Meaning that the code will never explore inside the if's.
采纳的回答
MATLAB is not Excel, and it is better to write code specifically for MATLAB:
>> C = {'N','NE','E','SE','S','SW','W','NW'};
>> fun = @(a) C{1+fix(mod(a+360/16,360)/45)};
>> fun(0)
ans = N
>> fun(-22)
ans = N
>> fun(-90)
ans = W
>> fun(90)
ans = E
>> fun(60)
ans = NE
PS: your code does not work because you invented this syntax:
M16<292.5>247.5
i.e.
A<B>C
which is equivalent to:
(A<B)>C
Because A<B returns either 0 or 1, this is equivalent to either of these:
(1)>C
(0)>C
and this will always be false for any C>=1 (e.g. all of the values that you used).
Rather than inventing syntaxes that do not work, it is more effective to read the MATLAB documentation:
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