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Question

fitting of a sinusoid

Hi Everyone! I have generated energy change (gammas.mat) of a simulation cell as a function of rigid displacement (ubp.mat) o...

3 years ago | 1 answer | 0

### 1

answerQuestion

Can I analytically solve a logarithmic equation using the symbolic toolbox?

I have an equation : where A is a constant. I have tried to solve this equation for 'u' with the symbolic toolbox. I am getting ...

3 years ago | 1 answer | 0

### 1

answerHow do I fit multiple curves with same fitting parameters?

I have figured out the issue with the fitting. The and are also functions of Temperatures and they need to be varied leaving ...

3 years ago | 0

| accepted

Question

How do I fit multiple curves with same fitting parameters?

I am trying to fit this expression: the 's are stress variables for three different temperatures. I have tried the following bu...

3 years ago | 3 answers | 0

### 3

answersQuestion

How to impose a variable temperature distribution for one edge of a rectangular plate while keeping the temperatures of other three edges same and constant?

Hi all, I was trying to plot heat flux lines for a heat transfer problem. The problem specifies a 0.3m by 0.1m rectangular pl...

3 years ago | 1 answer | 0

### 1

answerQuestion

Is it possible to plot this solution for a vibrating drum in a polar plot and possibly make a movie/gif for time 0 to 2 seconds?

r=linspace(0,1,100); theta=linspace(0,2*pi,100); tdrum=linspace(0,2,100); fun01=@(a) -besselj(0,2.2048*a); A1=(1/(sqrt(2)*2....

4 years ago | 0 answers | 1

### 0

answersQuestion

Is it possible to solve Boundary value problem using symbolic? Also looking for suggestions of any other way to solve this problem.

4 years ago | 0 answers | 0

### 0

answersQuestion

solve a differential equation at specific points

I have this differential equation (attached .jpg file). I also have the 'gamma', 'u' and 'tau' values (attached unotfinder.m fil...

4 years ago | 1 answer | 0

### 1

answerQuestion

How do I get real roots only from the Newton Raphson method for solving multivariable equation?

Hi All, I'm using the following lines of codes to call on the new_raph.m function to get solutions for x & y. b0=1; z=...

4 years ago | 0 answers | 0

### 0

answersQuestion

How to solve these two equations for 'tau' and 'b'? All the other symbols are constants. Please help??

<</matlabcentral/answers/uploaded_files/128069/Screen%20Shot%202018-08-07%20at%2012.04.47%20PM.png>> I've tried using the sys...

4 years ago | 1 answer | 0

### 1

answerQuestion

Need to solve equations which take vector inputs. The solv & solu are not supposed to be zero; as the variable R is changing they should change as well and should be vectors. Could anyone help??

syms tau_new b rc=1; x=linspace(1,100,1000); R=exp(1).*x.*rc; b0=.3614/sqrt(2); eqns=[(b...

4 years ago | 1 answer | 0

### 1

answerSolved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

4 years ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

4 years ago

Solved

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:...

4 years ago

Question

Getting complex values for fitting parameters using nlinfit. Can anyone explain the reason why?

Hello everyone, I am using the attached script to fit some data. All the input data for "nlinfit" are real numbers but the fi...

4 years ago | 1 answer | 0

### 1

answerQuestion

What's the difference between gammainc & igamma? Which one should I use to compute incomplete upper gamma function? Which one is scaled??

Incomplete upper gamma function

4 years ago | 1 answer | 0

### 1

answerQuestion

How do I approach fitting these data? I am attaching the modelled.m file which calls on cdf_cal.m function to estimate values for input data that correctly fit cumulative distribution function data (f) provided in the modelled.m file..

I have tried to improve the initial guess (b0) by changing it from 10 to 50 but seems impossible to fit all the data. I have bee...

4 years ago | 0 answers | 0