Question

Amount of variance in a given direction?

score 615 · Answer 1 · 2019-08-10 12:43:53

615

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Amount of variance in a given direction?

Published on 10 Aug 2019 - 12:43

score 295 · Answer 2 · 2026-03-28 11:54:12

295

Views

Let $W(t)$ be a standard Brownian motion. Define $X(t)=e^{W(t)}$. Let $0<s<t$. Give the expression for $Cov(X(s),X(t))$

Published on 28 Mar 2026 - 11:54

score 1.3k · Answer 3 · 2026-02-23 01:20:05

1.3k

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Converting from Euler angles to quaternion for covariance estimate

Published on 23 Feb 2026 - 1:20

score 32 · Answer 4 · 2026-03-27 02:34:06

32

Views

Confusion about a equation in a paper

Published on 27 Mar 2026 - 2:34

score 56 · Answer 5 · 2019-08-17 18:43:34

56

Views

Uniqueness of the solution for a set of equations (uniqueness of eigenvectors given their eigenvalues)

Published on 17 Aug 2019 - 18:43

score 82 · Answer 6 · 2019-08-29 10:11:11

82

Views

Show that $\operatorname{Cov}(\beta + BX)=B\Sigma B^T$

Published on 29 Aug 2019 - 10:11

score 228 · Answer 7 · 2019-08-29 12:04:30

228

Views

Find the covariance $\operatorname{Cov}(Y_1,Y_2)$ where $Y_i$s are linear combinations of i.i.d. variables

Published on 29 Aug 2019 - 12:04

score 131 · Answer 8 · 2026-03-26 01:06:12

131

Views

Covariance matrix of a stationary random process

Published on 26 Mar 2026 - 1:06

score 65 · Answer 9 · 2026-03-25 06:06:55

65

Views

How to calculate the variance/ standard deviation of a sum of ratios (X1+X2+X3+...)/Y?

Published on 25 Mar 2026 - 6:06

score 38 · Answer 10 · 2026-03-26 04:34:00

38

Views

Covariance function of a differencing in time series $z_t = x_t-x_{t-1}$

Published on 26 Mar 2026 - 4:34

score 62 · Answer 11 · 2026-03-26 06:17:28

62

Views

Computing the covariance function

Published on 26 Mar 2026 - 6:17

score 134 · Answer 12 · 2019-09-19 14:10:12

134

Views

How to find covariance matrix of a AWGN noise vector $n$ with variance =$\sigma^2$

Published on 19 Sep 2019 - 14:10

score 68 · Answer 13 · 2019-09-20 09:40:12

68

Views

What means : covariance are measure of linear dependance? Link with the skewness

Published on 20 Sep 2019 - 9:40

score 39 · Answer 14 · 2019-09-20 15:50:13

39

Views

Fair number cube with numbered sides, covariance of amount of rolls to change number

Published on 20 Sep 2019 - 15:50

score 3.2k · Answer 15 · 2019-09-22 10:27:23

3.2k

Views

Compute the covariance matrix by hand with Python / Numpy

Published on 22 Sep 2019 - 10:27

List Question

Amount of variance in a given direction?

Let $W(t)$ be a standard Brownian motion. Define $X(t)=e^{W(t)}$. Let $0<s<t$. Give the expression for $Cov(X(s),X(t))$

Converting from Euler angles to quaternion for covariance estimate

Confusion about a equation in a paper

Uniqueness of the solution for a set of equations (uniqueness of eigenvectors given their eigenvalues)

Show that $\operatorname{Cov}(\beta + BX)=B\Sigma B^T$

Find the covariance $\operatorname{Cov}(Y_1,Y_2)$ where $Y_i$s are linear combinations of i.i.d. variables

Covariance matrix of a stationary random process

How to calculate the variance/ standard deviation of a sum of ratios (X1+X2+X3+...)/Y?

Covariance function of a differencing in time series $z_t = x_t-x_{t-1}$

Computing the covariance function

How to find covariance matrix of a AWGN noise vector $n$ with variance =$\sigma^2$

What means : covariance are measure of linear dependance? Link with the skewness

Fair number cube with numbered sides, covariance of amount of rolls to change number

Compute the covariance matrix by hand with Python / Numpy

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