Community Profile # Evgheny

### Ryazan State Radio Engineering University

Active since 2011

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Question

griddata for closed surface
I have spherical data [theta, phi, R]: _R = f(theta, phi)_ I need to interpolate this data. I've used griddata function and g...

7 years ago | 1 answer | 0

### 1

Question

How to project a new point to PCA new basis?
For example, I have 9 variables and 362 cases. I've made PCA calculation, and found out that first 3 PCA coordinates are enough ...

8 years ago | 2 answers | 1

### 2

Question

Strange behaviour of vrrotvec. What is [0 0 0] axis?
I have such an example: v0 = [0 0 -1]; v1 = [0 0 1]; q = vrrotvec(v0, v1); So, as I understand, v1 is v0 rotated by 18...

9 years ago | 2 answers | 1

### 2

Question

What direction of rotation is used in vrrotvec function?
Is it right-handed or left-handed rotation in vrml functions such as vrrotvec? I thaught VRML uses left-handed, but for exa...

9 years ago | 1 answer | 0

### 1

Question

How to change variables in time in Simulink?
I have some processing (moving of wheelset). Wheelset has mass, it's variable and it's declaring in init.m file (for example M=1...

10 years ago | 1 answer | 0

### 1

Question

How to draw a plot by coefficents?
I have 5 coefficents: for example: a = [2 3 4 5 6] And I want to draw a plot a1 + a2*t + a3*t^2 + a4*sin(t) + a5*cos(t) h...

10 years ago | 1 answer | 0

### 1

How to make a symbolic matrix?
I'm sorry but in such a way - it calculates too (like a matrix).

10 years ago | 0

Question

How to make a symbolic matrix?
I need to make a symbolic matrix: 1 t1 t1^2 sin(t1) cos(t1) 1 t2 t2^2 sin(t2) cos(t2) .... 1 tm tm^2 sin(t...

10 years ago | 3 answers | 0