Why am i getting this error message? "Array indices must be positive integers or logical values."

조회 수: 4(최근 30일)
Hiruni Adithya Rajapakshe 2021년 10월 26일
댓글: Hiruni Adithya Rajapakshe 2021년 10월 26일
x = 120;
for n=1:10
f= (x(cosh(600/x) -12)-108);
x_1 = x-(f/diff(f))
x=x_1;
end
Array indices must be positive integers or logical values.

댓글을 달려면 로그인하십시오.

채택된 답변

Bjorn Gustavsson 2021년 10월 26일
In matlab (and most other programming-languages) you will have to write out the multiplication-operator (* for matrix multiplication or .* for elementwise multiplication). The way you write:
x(cosh(600/x)-12)
Will be interpreted as the cosh(600/x)-12th element of the matrix x. Note here that 600/x would be a right-matrix-division, for elementwise division you will have to use ./.
Most likely you want:
f= (x*(cosh(600/x) -12)-108);
Then you will have a problem with the next line too, because f is now a scalar which make the function diff return an empty array, [], so you will have to do something about that.
If you are very new to matlab take a trip through the on-ramp courses on the Matlab web-site.
HTH
댓글 수: 5표시숨기기 이전 댓글 수: 4
Hiruni Adithya Rajapakshe 2021년 10월 26일
yeah that sounds great! again thank you very much sir!

댓글을 달려면 로그인하십시오.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!