# DIP

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**Content Feed**

Question

Optimization Routine for two equations, three unknowns

Hi, I am trying to set up a basic optimization routine in matlab. Equation 1: 3.6*x*y = 750 Equation 2: 19.8*x*y*z = 8...

4 years ago | 1 answer | 0

### 1

answerQuestion

Shortening nested If statements

HI Friends, I am trying to shorten this nested if statement, is there a way to make it more compact ? GR = [3.78 2.0...

4 years ago | 1 answer | 0

### 1

answerQuestion

Plot multiple plots on the same graph

Hi , I wish to plot these graphs as a function of Tpack % Temperature of battery pack. There are two temperatures , Tpack = [...

4 years ago | 2 answers | 0

### 2

answersQuestion

Combine multiple if statements for something more compact

Friends, I'm trying to refine my code.It works fine but I have four if conditions which I want to make more efficient. Is the...

4 years ago | 2 answers | 0

### 2

answersQuestion

Create a single for loop for multiple conditions

Hi, I have a for loop with several calculations. There are three conditions for which the calculations are more or less the sa...

4 years ago | 1 answer | 0

### 1

answerQuestion

How to plot a parametric study on a single graph

Hi, Suppose I have a code a= [1 32 51 24 5 23] for i=1:length(a) c=a(i)+d; b=a(i)+e; end ...

5 years ago | 1 answer | 0

### 1

answerQuestion

How to plot symbolic variable that has a polynomial ?

Hi all. I have a code, i need to plot y vs the syms variable Lambda_avg as given in the last line. How do i plot so that i ca...

5 years ago | 1 answer | 0

### 1

answerQuestion

How to know what at iteration is the minimum value occuring?

Hi All Suppose I have a matrix A [ 9 8 6 7 8 2 5 9 6 ] . The minimum occurs at the 6th element. What code does one use to fin...

5 years ago | 1 answer | 0

### 1

answerQuestion

Optimization Function for Costs (fminbnd)

Hi, I have to optimize the cost using the fminbnd function I am getting a scalar error while the code runs the fminbnd fun...

5 years ago | 1 answer | 0

### 1

answerQuestion

Subscript indices Error for a Plot

Hi I am trying to calculate power but I cant seem to find out what is wrong (im a novice in matlab) The error is in the line f...

5 years ago | 1 answer | 0

### 1

answerQuestion

Trouble with ODE45 for an array of values

Hi, I have an equation udC/dx=R, where C and R are arrays. I've written a code but its giving a linear plot. Need help ...

5 years ago | 2 answers | 0

### 2

answersQuestion

Finite Difference Scheme Error

Hi, I am trying to plot this equation , i am unable to understand how to debug the matrix error on the equation. % Soluti...

5 years ago | 1 answer | 0

### 1

answerQuestion

How to compute a finite difference with variables that are arrays

<</matlabcentral/answers/uploaded_files/74497/Screenshot_13.png>> Hi, I have to compute the above. The methodology is ...

5 years ago | 0 answers | 0

### 0

answersQuestion

Setting up ODE in Matlab for ODE 45 solver

Hi, I am having difficulty setting this problem up for the ODE45 solver. It is a kinetics equation, relating R (rate constant...

5 years ago | 1 answer | 0

### 1

answerHow to solve an ODE with an array using ODE45?

% Solution 4: Chemical Species Concentration as a Function of Axial Distance clc clear % Constants L = 0.12; N...

5 years ago | 0

| accepted

Trouble with ODE45 for an array of values

% Solution 4: Chemical Species Concentration as a Function of Axial Distance clc clear % Constants L = 0....

5 years ago | 0

| accepted

Question

How to solve an ODE with an array using ODE45?

I have an ODE, udY/dx=S , where Y and S are arrays , how do I solve it using ODE45 ???

5 years ago | 3 answers | 0

### 3

answersEnd a Calculation if a condition is satisfied.

while abs(rk4-imp)>=0.00001 N_euler = N_euler+1; delxeuler=L/(N_euler-1); for j=1:N_euler-1 ...

5 years ago | 0

| accepted

Executing the while loop

Figured it out ! Thanks for your help ! % RK4 Method vs Implicit Euler Method clear all;close all; clc; form...

5 years ago | 1

| accepted

Question

Executing the while loop

Guys there is something wrong with my while loop. The while loop is supposed to run for 7389 iterations , but it only does two. ...

5 years ago | 3 answers | 0

### 3

answersQuestion

End a Calculation if a condition is satisfied.

I have a calculation to perform: Part A (Number of iterations are known) ODE is solved using Runge Kutta 4 and I get an a...

5 years ago | 2 answers | 0

### 2

answersQuestion

How to break a code when conditions are met

So I have a code with 2 numerical methods - backward euler and Runge kutta. What I want to do is create a program that calculate...

5 years ago | 1 answer | 0

### 1

answerStopping an Iteration when conditions have been met

Can anyone suggest to me in general how you dynamically change the iterations ? I want the iteration of the euler implicit to ...

5 years ago | 0

Question

Stopping an Iteration when conditions have been met

Hi guys, im trying to create a loop where I have to compare the euler implicit and RK4 method to compare the accuracy. The impli...

5 years ago | 3 answers | 0