# Bathala Teja

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**Feeds**

Question

FFT analysis using powergui in simulink

I have done 3 set of ode calculation in matlab and got result of 3 waveforms. I used ode45 for calculation so the time step is ...

2 years ago | 0 answers | 0

### 0

answersQuestion

Forming function handles in matrix

I want to form array of function handles first. After that i need to form 20*20 matrix by involving integration of these functi...

2 years ago | 0 answers | 0

### 0

answersQuestion

Replacing sym with function handle

I gave my script below. In order to get my result i used 'sym' function. But i want to implement without symbolic math toolbox,...

2 years ago | 1 answer | 0

### 1

answerQuestion

forming a function handles in matrix

I want to form a set of function handles in a row matrix. i wrote script like below. w = 2; Nr = 20 nr = @(phi)zeros(1, Nr...

2 years ago | 1 answer | 0

### 1

answerQuestion

issue in solving set of ode's

Here i gave my script with dummy R, G, L, g matrices(because of confidentiality). Here iam forming the matrices G, L and g int...

2 years ago | 0 answers | 0

### 0

answersQuestion

Issue with numerical integration of two variable function

I want to do integration of two variable function w.r.t one variable. A = @(x, y)cos(x)+sin(y) B = @(x, y)(A-integral(@(x)A, 0...

2 years ago | 3 answers | 0

### 3

answersQuestion

vpaintegral() not showing output

I want to integrate my two variable function w.r.t one variable. And i used vpaintegral() for that, But it is not showing expec...

2 years ago | 1 answer | 0

### 1

answerQuestion

Issue with int() function

I gave my script below. In that I am supposed to get Lrr in terms of theta but I am getting it in terms of values. How is this ...

2 years ago | 1 answer | 0

### 1

answerQuestion

substituting function variable in function handle

i want to substitute y(5) in place of theta and poceed for the ode calculations. Here is my script syms theta A0 = cos(thet...

2 years ago | 1 answer | 0

### 1

answerQuestion

Implementing Runge kutta method in place of ode45

I want to solve set of 1st order odes, for that i used ode45 function. But with ode45, it is taking hours and hours of time to ...

2 years ago | 1 answer | 0

### 1

answerQuestion

ODE45 is taking hours and hours to compute

I want to solve 27 odes, for that i formed equations with matrices. First i formed A(27*27 matrix), B(27*27 matrix) and C(25*25...

2 years ago | 2 answers | 0

### 2

answersQuestion

Unable to meet integration tolerances without reducing the step size below the smallest value allowed (1.776357e-15) at time t

My script consists of 4 ode eq's. Iam solving those using ode45 function. syms theta A = cos(theta).*[1 5 6 1 7; 5 0 2 9 3; ...

2 years ago | 1 answer | 0

### 1

answerQuestion

Arranging of variable submatrices into main matrix results in forming cos(conj(theta))

In my script, i formed matrices G_ss, G_sr, Grs, Grr(all are 3*3) in terms of theta. i am doing differentiation operation w.r.t...

2 years ago | 1 answer | 0

### 1

answerQuestion

Issue in plotting of output after function

Unable to plot output after function. I gave my script below syms theta A = cos(theta).*[1 5 6; 2 9 3; 5 1 0]; B = tan(2*the...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to call a variable matrix from one script to another script

I have two scripts. In first one i will get A and B matrices which are interms of theta as shown below. sym theta A = cos(thet...

2 years ago | 2 answers | 0

### 2

answersQuestion

How to form a function using 'for loop' without 'sym' command

i tried like this m = 150; Aos = 40; nAi = 0; for i=1:2:m nAi = @(phi)nAi+cos(i*phi); end nA = vpa((nAi+Aos), 4) Iam...

2 years ago | 2 answers | 0

### 2

answersQuestion

Compiling issue in doing integration of large function containing two variables

My script consists of two varible(theta and phi) functions. While doing integration w.r.t 'phi' it is not giving result, taking...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to use sym and function handle(@) in same code

I have a typical problem. I want to write a script which contains both syms and @() for initializing variables. First i used sy...

2 years ago | 2 answers | 0

### 2

answersQuestion

Solving system of ODE's contains complex equations

Iam forming system of 3 ODE's(dy1/dt, dy2/dt, dy3/dt) using matrices A, B and V. A and B matrices(both 3*3) are interms of some...

2 years ago | 1 answer | 0

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answerHow to solve system of first order ODE's by forming matrix

Firstly iam very happy for your suggestion, thank you very much. First solution is fine. But i have some complexity in my mai...

2 years ago | 0

Question

How to solve system of first order ODE's by forming matrix

Q: dy1/dt = 2*y1+5*y2+y3 dy2/dt = 7*y1+9*y2 dy3/dt = 4*y1+y2+3*y3 y1(0) = 0, y2(0)= 0, y3(0) = 0; i want to plot y1(t), y2...

2 years ago | 2 answers | 0