Answered

Why is this code returning values of zero?

Does zero for all variables trivially satisfy the equations? (Yes.) Did you request a solution of the equations? (Yes.) Do you...

Why is this code returning values of zero?

Does zero for all variables trivially satisfy the equations? (Yes.) Did you request a solution of the equations? (Yes.) Do you...

13 days ago | 0

Answered

How to use secant method to solve two equations

The secant method does not have a simple extension into multiple dimensions, although I am sure one could cobble something up. F...

How to use secant method to solve two equations

The secant method does not have a simple extension into multiple dimensions, although I am sure one could cobble something up. F...

13 days ago | 0

Answered

Negative floats to Binary

Just extract the bits. I'll get you started, like this. X = -0.942; hex = sprintf('%bx',X) hex = 'bfee24dd2f1a9fbe' The...

Negative floats to Binary

Just extract the bits. I'll get you started, like this. X = -0.942; hex = sprintf('%bx',X) hex = 'bfee24dd2f1a9fbe' The...

13 days ago | 0

| accepted

Answered

Finding PDF for difference of two PDFs

Why in the name of god and little green apples would you use a convolution to compute the distribution of the difference of two ...

Finding PDF for difference of two PDFs

Why in the name of god and little green apples would you use a convolution to compute the distribution of the difference of two ...

14 days ago | 0

Answered

not recognizing 3.2220e+03 as a positive integer?

Because it is not an integer. Yes, if you type in 3.2220e+03, MATLAB is smart enough to know that is an integer. But how do yo...

not recognizing 3.2220e+03 as a positive integer?

Because it is not an integer. Yes, if you type in 3.2220e+03, MATLAB is smart enough to know that is an integer. But how do yo...

14 days ago | 1

Answered

What are the values of single?

realmax('single') ans = single 3.4028e+38 -realmax('single') ans = single -3.4028e+38 The sign is not rele...

What are the values of single?

realmax('single') ans = single 3.4028e+38 -realmax('single') ans = single -3.4028e+38 The sign is not rele...

14 days ago | 2

Answered

Sum of the random array cannot reach the upper limit sum

Let me try to explain. You are trying to do this: lb=[56 65 21 21 16 7 31 32 35 32 17 40 79 114 104 69 56 41 16 16 11 9 10 19 3...

Sum of the random array cannot reach the upper limit sum

Let me try to explain. You are trying to do this: lb=[56 65 21 21 16 7 31 32 35 32 17 40 79 114 104 69 56 41 16 16 11 9 10 19 3...

15 days ago | 1

| accepted

Answered

can someone help me ? , something error in my code

Please don't post a picture of your error. Text works just fine, and then we can copy your code and paste it into MATLAB. Anywa...

can someone help me ? , something error in my code

Please don't post a picture of your error. Text works just fine, and then we can copy your code and paste it into MATLAB. Anywa...

15 days ago | 0

Answered

Im having trouble with the forward eulers method.

An array or vector index indicates where in memory you want to stuff some information. MATLAB uses a 1-based index scheme. So x...

Im having trouble with the forward eulers method.

An array or vector index indicates where in memory you want to stuff some information. MATLAB uses a 1-based index scheme. So x...

16 days ago | 0

Answered

how to generate complex matrix with variable diamension???

A very confusing question. Are you asking how to generate a matrix with complex elements? MATLAB automatically uses complex form...

how to generate complex matrix with variable diamension???

A very confusing question. Are you asking how to generate a matrix with complex elements? MATLAB automatically uses complex form...

16 days ago | 0

Answered

Please help on curve fitting

Assuming that you mean a model of the form Y = A + Bx^2 + C x^4 Simple is to download my polyfitn from the file exchange, whic...

Please help on curve fitting

Assuming that you mean a model of the form Y = A + Bx^2 + C x^4 Simple is to download my polyfitn from the file exchange, whic...

17 days ago | 0

| accepted

Answered

HOW CAN I DO BILATERAL FITERING ON AN IMAGE?

Do you have the image processing toolbox (properly) installed? What MATLAB release do you have? An old release may be too old t...

HOW CAN I DO BILATERAL FITERING ON AN IMAGE?

Do you have the image processing toolbox (properly) installed? What MATLAB release do you have? An old release may be too old t...

17 days ago | 0

Answered

Monte Carlo technique for normally distributed random variable

I'd suggest that a better way is to employ a truncated normal distribution. So, if you carefully sample points from a truncated ...

Monte Carlo technique for normally distributed random variable

I'd suggest that a better way is to employ a truncated normal distribution. So, if you carefully sample points from a truncated ...

17 days ago | 0

Answered

Why std function returns NaN?

LOOK AT WHAT YOU ARE DOING. R(7) ans = 49.8875023348093 R(40) ans = 47.332112186806 R(7):R(40) ans ...

Why std function returns NaN?

LOOK AT WHAT YOU ARE DOING. R(7) ans = 49.8875023348093 R(40) ans = 47.332112186806 R(7):R(40) ans ...

20 days ago | 2

Answered

can't find all the solutions

syms B vpasolve(sin(B-0.361)+sin(0.361)*exp(-B/0.377) == 0,B,3) ans = 3.5026252445445116308012726555233

can't find all the solutions

syms B vpasolve(sin(B-0.361)+sin(0.361)*exp(-B/0.377) == 0,B,3) ans = 3.5026252445445116308012726555233

21 days ago | 0

| accepted

Answered

How to pre-allocate for unknown size vector?

There are several simple ways to do this. Over-allocate the array. r will never be larger than 4. Therefore, the array will nev...

How to pre-allocate for unknown size vector?

There are several simple ways to do this. Over-allocate the array. r will never be larger than 4. Therefore, the array will nev...

21 days ago | 1

Answered

Can't seem to get polyfit to work.

I'd suggest that you are confused. Nothing you do will fit a cubic polynomial well to that data. It seems to have two points wh...

Can't seem to get polyfit to work.

I'd suggest that you are confused. Nothing you do will fit a cubic polynomial well to that data. It seems to have two points wh...

21 days ago | 1

| accepted

Answered

How can I get A knowing Ap and p?

No. There is insufficient information. You can view this as knowing n pieces of information, but needing to output n^2 pieces of...

How can I get A knowing Ap and p?

No. There is insufficient information. You can view this as knowing n pieces of information, but needing to output n^2 pieces of...

21 days ago | 0

Answered

How do i solve a cubic function giving the answer in a matrix

This is not a cubic polynomial. Fact. A cubic polynomial is of the form: a + b*x + c*x^2 + d*x^3 What you have is a rationa...

How do i solve a cubic function giving the answer in a matrix

This is not a cubic polynomial. Fact. A cubic polynomial is of the form: a + b*x + c*x^2 + d*x^3 What you have is a rationa...

21 days ago | 1

Answered

I am getting zero eigenvector while using sym/eig. What is the problem?

The problem is not with MATLAB. It appears that your matrix is defective. It does not have a complete basis set of eigenvectors....

I am getting zero eigenvector while using sym/eig. What is the problem?

The problem is not with MATLAB. It appears that your matrix is defective. It does not have a complete basis set of eigenvectors....

22 days ago | 0

Answered

Newton method to find polinom roots?

+1 to Torsten, because his answer is completely correct and should be the one you accept. All this answer does is be a bit more ...

Newton method to find polinom roots?

+1 to Torsten, because his answer is completely correct and should be the one you accept. All this answer does is be a bit more ...

22 days ago | 0

Answered

MxM correlation Matrix output

What does that even remotely have to do with a covariance matrix? :) Now, IF your goal really is just to create that array, the...

MxM correlation Matrix output

What does that even remotely have to do with a covariance matrix? :) Now, IF your goal really is just to create that array, the...

22 days ago | 0

Answered

search for link to download imfindcircle function !!

Sorry, but it would be a breach of license for someone to send you the code of imfindcircles.m. As well, that code would not run...

search for link to download imfindcircle function !!

Sorry, but it would be a breach of license for someone to send you the code of imfindcircles.m. As well, that code would not run...

23 days ago | 0

Answered

How to divide a matrix by a polynomial?

In general, you can't. This is not aquestion of "dividing a matrix by a polynomial". In fact, that makes no sense at all. You h...

How to divide a matrix by a polynomial?

In general, you can't. This is not aquestion of "dividing a matrix by a polynomial". In fact, that makes no sense at all. You h...

23 days ago | 1

| accepted

Answered

Is there anybody help me to solve the follwing equation?

These lines do absolutely nothing: a>=0; c>0; They are not some sort of advance declaration about the values of a and c. Nutt...

Is there anybody help me to solve the follwing equation?

These lines do absolutely nothing: a>=0; c>0; They are not some sort of advance declaration about the values of a and c. Nutt...

23 days ago | 0

Answered

Concatenating cell arrays in matlab

Easy peasy? a a = 1×3 cell array {37720×155 double} {37720×155 double} {37720×155 double} b b = 1×3 cell ...

Concatenating cell arrays in matlab

Easy peasy? a a = 1×3 cell array {37720×155 double} {37720×155 double} {37720×155 double} b b = 1×3 cell ...

23 days ago | 2

Answered

Solving system of three non linear equations??

Fsolve is a nonlinear optimization tool. It NEEDS startinng values. Good starting values are often important if your system is n...

Solving system of three non linear equations??

Fsolve is a nonlinear optimization tool. It NEEDS startinng values. Good starting values are often important if your system is n...

24 days ago | 0

Answered

Optimization toolbox: "lsqnonlin" stopped because it exceeded the function evaluation limit

Note that I don't know which release of MATLAB you are using. But what did you try? This seems clear: opts = optimoptions('lsqn...

Optimization toolbox: "lsqnonlin" stopped because it exceeded the function evaluation limit

Note that I don't know which release of MATLAB you are using. But what did you try? This seems clear: opts = optimoptions('lsqn...

25 days ago | 2

| accepted

Answered

Conversion to double from sym is not possible

Do we need to guess what the function he does? If I assume it returns some arbitrary numeric value, then look at what you are do...

Conversion to double from sym is not possible

Do we need to guess what the function he does? If I assume it returns some arbitrary numeric value, then look at what you are do...

25 days ago | 0

Answered

Solve system of linear ODEs with variable coefficients

Why not? Yes, you can. Use tools like ode45, etc. Read the documentation for ode45, and you will find examples of use. Depending...

Solve system of linear ODEs with variable coefficients

Why not? Yes, you can. Use tools like ode45, etc. Read the documentation for ode45, and you will find examples of use. Depending...

26 days ago | 0