what does the x(10:15) mean?
조회 수: 4 (최근 30일)
이전 댓글 표시
Hello everyone,
I am reading a code developed by someone else and don't understand what does the x(10:15).'*x(4:9).
I know that you can solve a set of variables by using a function and going like this: x(1) x(2) etc.
Here's the section of the code: y_hat = x(10:15).'*x(4:9);
How do you call that notation? x(10:15) so I can look it up and read about it in forums.
Thanks!
댓글 수: 0
채택된 답변
Star Strider
2018년 10월 31일
편집: Star Strider
2018년 10월 31일
This assignment:
y_hat = x(10:15).'*x(4:9);
if ‘x’ is a row vector, does matrix multiplication of the transposed 5 elements of ‘x’ from ‘x(10)’ to and including ‘x(15)’ (to create a column vector) by the elements of ‘x(4:9)’ to create a matrix. If ‘x’ is a column vector, this calculated the dot product instead.
댓글 수: 2
Torsten
2018년 10월 31일
I think - depending on whether x is a row or column vector - y_hat is a 6x6 matrix or a scalar.
Star Strider
2018년 10월 31일
@Torsten — Oops! I did not see the transpose!
I revised my Answer accordingly.
Thanks!
추가 답변 (1개)
madhan ravi
2018년 10월 31일
편집: madhan ravi
2018년 10월 31일
x(10:15)
it means elements from 10 to 15 are picked from vector x
see example:
>> x=1:15
x =
Columns 1 through 13
1 2 3 4 5 6 7 8 9 10 11 12 13
Columns 14 through 15
14 15
>> x(11:15)
ans =
11 12 13 14 15
>>
댓글 수: 1
참고 항목
카테고리
Help Center 및 File Exchange에서 Logical에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!