Answered

PLEASE HELP ME CONVERT THIS EQUATION TO MATLAB CODE

Well, you did make an effort, and it was pretty close. But did you read my response? Did you read the help for tand and cosd? W...

PLEASE HELP ME CONVERT THIS EQUATION TO MATLAB CODE

Well, you did make an effort, and it was pretty close. But did you read my response? Did you read the help for tand and cosd? W...

etwa 18 Stunden ago | 0

| accepted

Answered

Exponential Piecewise function creation.

A spline is not a piecewise exponential function, so using spline directly would be a waste of time, IF you truly need a piecewi...

Exponential Piecewise function creation.

A spline is not a piecewise exponential function, so using spline directly would be a waste of time, IF you truly need a piecewi...

etwa 18 Stunden ago | 1

Answered

minimum value of one inequality

This is just mathematics. r = 0.001; s = 7; n ALWAYS appears as 2^(-n/2). So calling that number x, first write the problem ...

minimum value of one inequality

This is just mathematics. r = 0.001; s = 7; n ALWAYS appears as 2^(-n/2). So calling that number x, first write the problem ...

ein Tag ago | 4

| accepted

Answered

Generate random sequence number with condition

I think you still do not appreciate that you cannot just say something is "random" and not define the distribution. For exampl...

Generate random sequence number with condition

I think you still do not appreciate that you cannot just say something is "random" and not define the distribution. For exampl...

2 Tage ago | 1

Answered

error using cross (A and B must have at least one dimension of length 3.)

I'm not sure what you want in terms of a 25000 dimensional cross produt between two vectors. What do you think it means? After a...

error using cross (A and B must have at least one dimension of length 3.)

I'm not sure what you want in terms of a 25000 dimensional cross produt between two vectors. What do you think it means? After a...

2 Tage ago | 1

| accepted

Answered

Diagonalising a Skew-Symmetric Matrix

Matrices that are defective will not have a complete set of eigenvectors. https://en.wikipedia.org/wiki/Defective_matrix " In...

Diagonalising a Skew-Symmetric Matrix

Matrices that are defective will not have a complete set of eigenvectors. https://en.wikipedia.org/wiki/Defective_matrix " In...

3 Tage ago | 0

Answered

Molecules on flat surface by using the package of Atomistic Topology Operations

Without more carefully reading the help for the code you are using, when I go to that link, it describes Box_dim as a variable. ...

Molecules on flat surface by using the package of Atomistic Topology Operations

Without more carefully reading the help for the code you are using, when I go to that link, it describes Box_dim as a variable. ...

3 Tage ago | 0

Answered

Taylor polynomial of a not infinitely differentiable function.

Your question has absolutely nothing to do with MATLAB, but you seem to have made some effort. So I will point out that you may ...

Taylor polynomial of a not infinitely differentiable function.

Your question has absolutely nothing to do with MATLAB, but you seem to have made some effort. So I will point out that you may ...

3 Tage ago | 1

| accepted

Answered

Numerical integration over (0, x1)

If t is unknown, then you need to use symbolic tools to do the integration. syms x t K = 1/((exp(0.014342/(x * t)) - 1)) * (1/...

Numerical integration over (0, x1)

If t is unknown, then you need to use symbolic tools to do the integration. syms x t K = 1/((exp(0.014342/(x * t)) - 1)) * (1/...

4 Tage ago | 1

| accepted

Answered

How can i compute an interpolated curve?

You don't provide the actual data. But you are asking to do something which is trivially easy for the eye to do, more difficult ...

How can i compute an interpolated curve?

You don't provide the actual data. But you are asking to do something which is trivially easy for the eye to do, more difficult ...

4 Tage ago | 1

| accepted

Answered

how can I draw half circle in matlab ?

Sigh. You DID make an effort. It is not even a terrible solution, though what you did will not work, since it will at best be a ...

how can I draw half circle in matlab ?

Sigh. You DID make an effort. It is not even a terrible solution, though what you did will not work, since it will at best be a ...

5 Tage ago | 2

| accepted

Answered

linprog cannot find solution

While you claim a solution exists, initially, I sincerely wonder if it truly does. I may learn differently by the time I am done...

linprog cannot find solution

While you claim a solution exists, initially, I sincerely wonder if it truly does. I may learn differently by the time I am done...

5 Tage ago | 1

Answered

How to Run PSO with Real Data

You can't. That is, the optimal is just the optimal value at each point in your sample. You cannot do better than that, at least...

How to Run PSO with Real Data

You can't. That is, the optimal is just the optimal value at each point in your sample. You cannot do better than that, at least...

6 Tage ago | 0

Answered

How to solve for x in an sin equation?

No. There are INFINITELY many solutions. So you cannot say you want the OTHER solution. You can simply enough find a positive so...

How to solve for x in an sin equation?

No. There are INFINITELY many solutions. So you cannot say you want the OTHER solution. You can simply enough find a positive so...

7 Tage ago | 0

| accepted

Answered

linearly independent eigen vectors

And for some strange reason, you think that eig as applied to a diagonal matrix does not produce a set of independent eigenvecto...

linearly independent eigen vectors

And for some strange reason, you think that eig as applied to a diagonal matrix does not produce a set of independent eigenvecto...

7 Tage ago | 0

| accepted

Answered

How can large sparse matrix (Y bus matrix of order 800*800) be done inverse in Matlab?

An 800 by 800 matrix is barely what I would call large anymore. Perhaps 40 years ago, yes. Today, it is almost tiny. Ok, not tin...

How can large sparse matrix (Y bus matrix of order 800*800) be done inverse in Matlab?

An 800 by 800 matrix is barely what I would call large anymore. Perhaps 40 years ago, yes. Today, it is almost tiny. Ok, not tin...

7 Tage ago | 0

| accepted

Answered

How to subtract from a vector array and, if the answer is lees than 0, have it return a value of 0

Simple. No need to test anything either. Just use the max function. x = [1 2 3]; x(1) = max(x(1) - 2,0); x x = 0 ...

How to subtract from a vector array and, if the answer is lees than 0, have it return a value of 0

Simple. No need to test anything either. Just use the max function. x = [1 2 3]; x(1) = max(x(1) - 2,0); x x = 0 ...

10 Tage ago | 0

Answered

Calculate factorial with 2 variables

Why do you feel you need to use loops? You should never write your own code for something that is far better computed using an e...

Calculate factorial with 2 variables

Why do you feel you need to use loops? You should never write your own code for something that is far better computed using an e...

10 Tage ago | 2

Answered

Random number from 1 to 100 if the number between 20 to 30 add 100 if the number 50 to 60 minus 100.

I'll generate 10 samples. N = 10; X = randi(100,1,N); ind = (X >= 20) & (X <= 30); X(ind) = X(ind) + 100; ind = (X >= 5...

Random number from 1 to 100 if the number between 20 to 30 add 100 if the number 50 to 60 minus 100.

I'll generate 10 samples. N = 10; X = randi(100,1,N); ind = (X >= 20) & (X <= 30); X(ind) = X(ind) + 100; ind = (X >= 5...

12 Tage ago | 0

Answered

Curve Fitting and Distribution Fitting

You have what, 13 data points? A model with many exponents in it? A model that is surely based on no real physical meaning of th...

Curve Fitting and Distribution Fitting

You have what, 13 data points? A model with many exponents in it? A model that is surely based on no real physical meaning of th...

14 Tage ago | 0

Answered

Integral of bessel function returns all zeros

It is a really bad idea to use gamma as a variable name because you are now stepping on the name of a very useful function in MA...

Integral of bessel function returns all zeros

It is a really bad idea to use gamma as a variable name because you are now stepping on the name of a very useful function in MA...

14 Tage ago | 0

| accepted

Answered

Sampling data using contraints

Use my randFixedLinearCombination tool, as found on the file exchange. (I did just post an update today, fixing a bug the code t...

Sampling data using contraints

Use my randFixedLinearCombination tool, as found on the file exchange. (I did just post an update today, fixing a bug the code t...

14 Tage ago | 1

| accepted

Submitted

randFixedLinearCombination

Uniform random samples over a n-dimensional hyper-rectangle, subject to a linear equality constraint

14 Tage ago | 7 downloads |

Answered

recursive function to check a Palindrome

Why not try? I won't write it for you, as the entire problem is to make you think. I'll give you one hint, and I will hope nobod...

recursive function to check a Palindrome

Why not try? I won't write it for you, as the entire problem is to make you think. I'll give you one hint, and I will hope nobod...

14 Tage ago | 1

Answered

Constructing a Maze with vectors

Insert NaNs between eack block of lines. X = [x,nan,x1,nan,x2]; Y = [y,nan,y1,nan,y2]; Now the various sets of line segments ...

Constructing a Maze with vectors

Insert NaNs between eack block of lines. X = [x,nan,x1,nan,x2]; Y = [y,nan,y1,nan,y2]; Now the various sets of line segments ...

15 Tage ago | 1

| accepted

Answered

How to solve exponential equations.

Thank you for posting this as a question instead of an answer. The simplest way to solve this is if you have the curve fitting ...

How to solve exponential equations.

Thank you for posting this as a question instead of an answer. The simplest way to solve this is if you have the curve fitting ...

15 Tage ago | 0

Answered

creating a repeating diagonal matrix

You want to repeat that sequence on the main diagonal? v = [4 1 0 1]; A = diag(repmat(v,1,25)); That is, use repmat to replic...

creating a repeating diagonal matrix

You want to repeat that sequence on the main diagonal? v = [4 1 0 1]; A = diag(repmat(v,1,25)); That is, use repmat to replic...

17 Tage ago | 0

| accepted

Answered

Matrix equation solution keep giving only structure of the array not the value

As I explained in my comment to @Vasishta Bhargava, this is a problem with 3 equations, but only 2 unknowns. It is known as an o...

Matrix equation solution keep giving only structure of the array not the value

As I explained in my comment to @Vasishta Bhargava, this is a problem with 3 equations, but only 2 unknowns. It is known as an o...

17 Tage ago | 1

Answered

CurveFit on Vector Data Points

The problem is, your data appears to be highly noisy. You can use simple linear interpolation to interpolate the data. KSSV hs ...

CurveFit on Vector Data Points

The problem is, your data appears to be highly noisy. You can use simple linear interpolation to interpolate the data. KSSV hs ...

17 Tage ago | 0

Answered

Complex answer of acos function

The acos of a number that exceeds 1 or -1 is complex. This is the ONLY way that can happen, at least unless you have defined you...

Complex answer of acos function

The acos of a number that exceeds 1 or -1 is complex. This is the ONLY way that can happen, at least unless you have defined you...

18 Tage ago | 0

| accepted