# Jan Filip

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Question

Index exceeds the number of array elements in ODE using anonymous function

I dont't understand what is wrong with this scirpt. For different set of equations I was able to use anonymous functions inside ...

8 months ago | 1 answer | 0

### 1

answerQuestion

How to plot coordinate data to appear solid with lighting effect?

I have quite delicate problem. In the for loop I am plotting these circles using plot3(x,y,z) so after number of iteration...

8 months ago | 2 answers | 0

### 2

answersQuestion

Avoid root switching using roots

Hello, I am having following problem. It is a very simple. First formulate symbolically some matrix . Then I wish to study . ...

9 months ago | 0 answers | 0

### 0

answersQuestion

transform ode15i input to ode15s input

Since I got completely stuck in the last two weeks I am giving up with ode15i solver and I would like to solve my equations usin...

1 year ago | 0 answers | 0

### 0

answersQuestion

Piecewise ode15i

Suppose that given DAE system containing peicewise defined function. What is more convenient way to call ode15i: a) put condit...

1 year ago | 1 answer | 0

### 1

answerQuestion

ode15i instability and initial values

Consider following MWE: eqn1 = i_V11(t) + u_1(t)/10 - u_2(t)/10 == 0 eqn2 = (3*u_2(t))/25 - u_1(t)/10 - u_3(t)/50 + (77371252...

1 year ago | 0 answers | 0

### 0

answersQuestion

Generation of symbolic vector of functions

I need to define a lot of symbolic variables for DAE solver. Instead of using sym f1(t) f2(t) % up to arbitrary fN(t) i woul...

1 year ago | 1 answer | 0

### 1

answerSolved

Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

1 year ago

Question

Gegenbauer polynomials wont produce Chebyshev polynomials using Symbolic Toolbox

Consider code syms x n = 4; a = -0.5; gegenbauerC(n,a,x) It produces following output - (5*x^4)/8 + (3*x^2)/4 - 1/8 which...

1 year ago | 1 answer | 0