AppliedNumeric answer
is the orthogonal projection onto a -dimensional subspace of . What is the trace of ?
Answer with a number. Fractions, powers and expressions like 23/6 or C(52,5) are read correctly in practice.
The worked solution is in Premium
The answer, the full working and the one idea to take away – for this and all 1,322 questions in the bank. Answer it in practice and your working is marked, with a known mistake named when you make one.
Learn the method
More linear algebra questions
- What is the cosine of the angle between (1,2,2) and (2,1,2), to three decimals?Foundation
- Projecting onto a factor, part 1 of 3Foundation
- Geometrically, what does ordinary least squares compute?Applied
- Project y = (1,2,3) onto the span of (1,1,1). What is the squared length of the residual?Applied
- Projecting onto a factor, part 2 of 3Applied
- Projecting onto a factor, part 3 of 3Advanced