Operands to the || and && operators must be convertible to logical scalar values. Error in logspace (line 23) if d2 == pi || d2 == single(pi)
조회 수: 3 (최근 30일)
이전 댓글 표시
i have a vector of current and vector of voltage , i want to get logarithmic samples from both vectors instead of equally spaces. i try current=[...........] voltage=[...........] logspace(current,voltage) it will give me error.
댓글 수: 1
채택된 답변
Iain
2014년 2월 27일
Assuming that logspace is something you didn't write and you can't change the if statement:
for i = 1:1666
logarithmic_space(i) = logspace(current(i),voltage(i))
end
댓글 수: 0
추가 답변 (2개)
Jos (10584)
2014년 2월 25일
Apparantly, one of the expressions d2 == .. is not a logical scalar. My first guess would be that d2 is not a scalar, but an array with more than 1 element. Can you insert a
disp(size(d2))
just before the if statement?
Then, what would you like to do when there are more elements in d2. Compare them all to pi? ALL and ANY may help you out here:
help all
help any
In addition, comparing floating points using == is tricky. Take a look here:
d2 = 0.1+0.2+0.3
if d2==0.6
disp('d2 equals 0.6')
else
disp('d2 does NOT equal 0.6')
end
Not quite what you would expected. The solution to compare two floating point values, is to use a tolerance:
if abs(valueOne - valueTwo) < TOL
...
end
where you can define a tolerance.
참고 항목
카테고리
Help Center 및 File Exchange에서 Creating and Concatenating Matrices에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!