Answered

@ Symbol in function handles as an input variable to another function

Integral will only accept an input function as a function handle. The @ converts the m-file name into a function handle, that in...

@ Symbol in function handles as an input variable to another function

Integral will only accept an input function as a function handle. The @ converts the m-file name into a function handle, that in...

13 días ago | 0

Answered

How to perform pseudo inverse with set of elements in a matrix?

I think you misunderstand the linear algebra here. A=(1:12).'; B=(1:4).'; A_43 = reshape(A,length(B),[]) % I'll create a vari...

How to perform pseudo inverse with set of elements in a matrix?

I think you misunderstand the linear algebra here. A=(1:12).'; B=(1:4).'; A_43 = reshape(A,length(B),[]) % I'll create a vari...

13 días ago | 0

Answered

Numerical solution for a complex formula

syms M A y = 1.4; eqn = A == ((1)/(M))*((1+((y-1)/(2))*(M^(2)))/((y+1)/(2)))^((y+1)/(2*(y-1))) Now you wish to solve that exp...

Numerical solution for a complex formula

syms M A y = 1.4; eqn = A == ((1)/(M))*((1+((y-1)/(2))*(M^(2)))/((y+1)/(2)))^((y+1)/(2*(y-1))) Now you wish to solve that exp...

13 días ago | 0

Answered

3-dimensional orthonormal rotation symbolical

You have several misunderstandings here. First: phi_x = pi/2; phi_y = 0; phi_z=pi; % Define symbolic variables syms phi_x p...

3-dimensional orthonormal rotation symbolical

You have several misunderstandings here. First: phi_x = pi/2; phi_y = 0; phi_z=pi; % Define symbolic variables syms phi_x p...

13 días ago | 0

Answered

Plotting multiple inequalities in 3D Space

First, [x,y,x] = meshgrid(-10:0.1:10); Correct code is important in MATLAB. Else it will not know that you really intended ...

Plotting multiple inequalities in 3D Space

First, [x,y,x] = meshgrid(-10:0.1:10); Correct code is important in MATLAB. Else it will not know that you really intended ...

14 días ago | 0

| accepted

Answered

how can i get value of y

You want to solve for y, as an implicit function of r? First, you should consider if a solution exists at all. Is it multi-valu...

how can i get value of y

You want to solve for y, as an implicit function of r? First, you should consider if a solution exists at all. Is it multi-valu...

14 días ago | 1

Answered

full rank left annihilator matrix

Are you asking to find a MATRIX B that will kill off A when you left multiply B*A? syms x1 x2 x3 x4 Cdc Cb Lcpl Vfc A=[Vfc/(x...

full rank left annihilator matrix

Are you asking to find a MATRIX B that will kill off A when you left multiply B*A? syms x1 x2 x3 x4 Cdc Cb Lcpl Vfc A=[Vfc/(x...

15 días ago | 1

| accepted

Answered

How to solve 3 differntial equation by Runge-Kutta 4th order

If you NEED to use Runge-Kutta, then this is a homework assignment, and you are not telling us, because you know that we don't d...

How to solve 3 differntial equation by Runge-Kutta 4th order

If you NEED to use Runge-Kutta, then this is a homework assignment, and you are not telling us, because you know that we don't d...

15 días ago | 0

| accepted

Answered

Support for older MATLAB versions on new operating systems

Um, lets be rational here. Can The MathWorks control how operating system X changes? They wrote their software to run on X, re...

Support for older MATLAB versions on new operating systems

Um, lets be rational here. Can The MathWorks control how operating system X changes? They wrote their software to run on X, re...

16 días ago | 0

Answered

Trouble using atan2 for coordinate transform, maybe recommend other tools.

The transformation you are using is a simple tranformation into polar coordinates. When you have y in there also, this becomes w...

Trouble using atan2 for coordinate transform, maybe recommend other tools.

The transformation you are using is a simple tranformation into polar coordinates. When you have y in there also, this becomes w...

16 días ago | 0

Answered

code for a simple nanogram function

Now roughly a month since the original post, and nobody has answered. I was not sure if this could be a student problem, so I ga...

code for a simple nanogram function

Now roughly a month since the original post, and nobody has answered. I was not sure if this could be a student problem, so I ga...

17 días ago | 0

Answered

How can i define a m by n symbolic matrix?

If m and n are themselves symbolic, you cannot do so. However, you can do this: matfun = @(m,n) sym('a',[m,n]); Now you can us...

How can i define a m by n symbolic matrix?

If m and n are themselves symbolic, you cannot do so. However, you can do this: matfun = @(m,n) sym('a',[m,n]); Now you can us...

18 días ago | 0

| accepted

Answered

Accuracy of polygon approximation

R*2 is not remotely meaningful here, unless you find a way to intelligently extend it to this situation. I would probably find ...

Accuracy of polygon approximation

R*2 is not remotely meaningful here, unless you find a way to intelligently extend it to this situation. I would probably find ...

19 días ago | 0

| accepted

Answered

Function value and YDATA sizes are not equal BUT THEY ARE

The expectation is that in the function (here, Cp) the data vector should be the SECOND argument. It needs to be Cp = @(x,T7)...

Function value and YDATA sizes are not equal BUT THEY ARE

The expectation is that in the function (here, Cp) the data vector should be the SECOND argument. It needs to be Cp = @(x,T7)...

19 días ago | 2

| accepted

Answered

Help Finding Explicit Solution Non Linear Differential Equation

There is no assurance that ever nonlinear differential equatino you may choose to pose has an analytical solution. In fact, I no...

Help Finding Explicit Solution Non Linear Differential Equation

There is no assurance that ever nonlinear differential equatino you may choose to pose has an analytical solution. In fact, I no...

19 días ago | 0

Answered

Which is the smallest natural number n to which it applies a(n)>10?

The obvious answer is brute force, thus... a_i = 1; a_iplus1 = 1; plot(a_i,a_iplus1,'o') hold on iter = 2; imax = 1e6; wh...

Which is the smallest natural number n to which it applies a(n)>10?

The obvious answer is brute force, thus... a_i = 1; a_iplus1 = 1; plot(a_i,a_iplus1,'o') hold on iter = 2; imax = 1e6; wh...

19 días ago | 1

Answered

How to draw a line on a symbolic surface

syms x1 x2 f1 = x1^2+x2^3-9 fsurf(f1); hold on fimplicit(f1,'r') WTP? :)

How to draw a line on a symbolic surface

syms x1 x2 f1 = x1^2+x2^3-9 fsurf(f1); hold on fimplicit(f1,'r') WTP? :)

19 días ago | 0

| accepted

Answered

Trying to do product of eigenvalues collected from a matrix

You don't want to use the product of eigenvalues to determine if a matrix is singular. This is equivalent to computing the deter...

Trying to do product of eigenvalues collected from a matrix

You don't want to use the product of eigenvalues to determine if a matrix is singular. This is equivalent to computing the deter...

21 días ago | 1

Answered

Output vector in the polyval

format long g p=[1 0 0 0 0 -5 3 21]; x=[10 15 20]; poly_value=polyval(p,x) poly_value = 9999551 170858316 ...

Output vector in the polyval

format long g p=[1 0 0 0 0 -5 3 21]; x=[10 15 20]; poly_value=polyval(p,x) poly_value = 9999551 170858316 ...

21 días ago | 0

| accepted

Answered

Quadratic/Exponential Best Fit Curve

First, you have 4 data points. Trying to fit a degree 7 (SEVEN) polynomial to that is just silly. Yes, you say quadratic. But yo...

Quadratic/Exponential Best Fit Curve

First, you have 4 data points. Trying to fit a degree 7 (SEVEN) polynomial to that is just silly. Yes, you say quadratic. But yo...

21 días ago | 0

| accepted

Answered

Why are alternative forms for "dbstop in file at location if expression" not documented?

All commands in MATLAB are actually implemented as functions. There is a command/function duality in existence. So you can alway...

Why are alternative forms for "dbstop in file at location if expression" not documented?

All commands in MATLAB are actually implemented as functions. There is a command/function duality in existence. So you can alway...

22 días ago | 0

| accepted

Answered

How to adjust a cloud point to meet the minimum distance requirement?

Sorry, but no. There is no analytical solution that would provide the clustering that you wish to achieve. You can use clusterin...

How to adjust a cloud point to meet the minimum distance requirement?

Sorry, but no. There is no analytical solution that would provide the clustering that you wish to achieve. You can use clusterin...

23 días ago | 0

Answered

how factor a polynomial into 2 quadratics?

You cannot uniquely factor a 4th degree polynomial into such a pair of quadratics. You may think that you can, but it is provabl...

how factor a polynomial into 2 quadratics?

You cannot uniquely factor a 4th degree polynomial into such a pair of quadratics. You may think that you can, but it is provabl...

23 días ago | 0

| accepted

Answered

seven roots of an equation

Your equation is: What you have done in code is terribly confusing. There is no need to use symsum. Can we assume that b is ...

seven roots of an equation

Your equation is: What you have done in code is terribly confusing. There is no need to use symsum. Can we assume that b is ...

23 días ago | 1

| accepted

Answered

How to get coefficient non linear fit?

% Make up some random data since you gave us none x = rand(50,1); y = 0.3*exp(-2.5*x) + 1 + randn(size(x))/50; plot(x,y,'.') ...

How to get coefficient non linear fit?

% Make up some random data since you gave us none x = rand(50,1); y = 0.3*exp(-2.5*x) + 1 + randn(size(x))/50; plot(x,y,'.') ...

24 días ago | 0

Answered

A better way to do antidiagonal matrix vectorization?

This should not be that difficult. One trick might be to use ndgrid, and then a sort. For example, consider the function adunrol...

A better way to do antidiagonal matrix vectorization?

This should not be that difficult. One trick might be to use ndgrid, and then a sort. For example, consider the function adunrol...

24 días ago | 2

Answered

why in this function they use empty square brackets?

It is not a dumb question at all, because the syntax used by MATLAB to delete a row or column of an array may not be obvious. Bu...

why in this function they use empty square brackets?

It is not a dumb question at all, because the syntax used by MATLAB to delete a row or column of an array may not be obvious. Bu...

24 días ago | 1

| accepted

Answered

What is the problem with my code? How to do integration of matrix which consists integral variable?

M is a SYMBOLIC variable. You use int to integrate it, not integral. syms x; M = [x x^2]; int(M,[0,12])

What is the problem with my code? How to do integration of matrix which consists integral variable?

M is a SYMBOLIC variable. You use int to integrate it, not integral. syms x; M = [x x^2]; int(M,[0,12])

24 días ago | 0

| accepted

Answered

Subs with 2 numbers returns a number

Simple enough. Convert the original expression to a string. Now just do string processing, with finds and replace operations. C...

Subs with 2 numbers returns a number

Simple enough. Convert the original expression to a string. Now just do string processing, with finds and replace operations. C...

27 días ago | 0

Answered

Solve second order non linear differential equation

You will not be able to use bvp4c directly, since it will use collocation. That will fail on an infinite domain. One option mig...

Solve second order non linear differential equation

You will not be able to use bvp4c directly, since it will use collocation. That will fail on an infinite domain. One option mig...

28 días ago | 0