回答済み

Euler Angles from Rotation Matrix

Hi Gregory, If you mean you want the form of the rotation martrix in terms of alpha,beta,gamma, that's just syms a b g R1 = [...

Euler Angles from Rotation Matrix

Hi Gregory, If you mean you want the form of the rotation martrix in terms of alpha,beta,gamma, that's just syms a b g R1 = [...

2ヶ月 前 | 1

| 採用済み

回答済み

roots of the complex equation with one variables

Hello Varun, Your code gives for solutions b = 30.857 - 175.74i -94.032 - 211.56i 70.398 - 342.7...

roots of the complex equation with one variables

Hello Varun, Your code gives for solutions b = 30.857 - 175.74i -94.032 - 211.56i 70.398 - 342.7...

2ヶ月 前 | 0

回答済み

multiple r values for multiple theta values

Hi Allan For an element-by-element calculation, use ./ and .* rather than / and * theta=[pi,3,2.8,2.5,2,pi/2,1.3,1.0,0.75...

multiple r values for multiple theta values

Hi Allan For an element-by-element calculation, use ./ and .* rather than / and * theta=[pi,3,2.8,2.5,2,pi/2,1.3,1.0,0.75...

2ヶ月 前 | 1

回答済み

Modifying 'Bessel second-order ordinary differential equation' in matlab library.

Hi K^2, Picking kr as the argument, take a look at J(kr) and do the differentiations on d^2/dr^2 J(kr) + (1/r) d/dr(J(kr). Ta...

Modifying 'Bessel second-order ordinary differential equation' in matlab library.

Hi K^2, Picking kr as the argument, take a look at J(kr) and do the differentiations on d^2/dr^2 J(kr) + (1/r) d/dr(J(kr). Ta...

2ヶ月 前 | 0

| 採用済み

回答済み

solving a system of 2nd order 2 ODE: output vector length not matching the initial condition vector length

Hi yosri, the reason this is happening is that the expression for dy/dt has four elements, but one of them contains diff(y(4)) ...

solving a system of 2nd order 2 ODE: output vector length not matching the initial condition vector length

Hi yosri, the reason this is happening is that the expression for dy/dt has four elements, but one of them contains diff(y(4)) ...

2ヶ月 前 | 0

回答済み

Create a vector field

Hi ALvaro, The code below sets P=Q=0 to make the spacial dependence more clear. Rather than meshgridding the 1d velocity vecto...

Create a vector field

Hi ALvaro, The code below sets P=Q=0 to make the spacial dependence more clear. Rather than meshgridding the 1d velocity vecto...

2ヶ月 前 | 0

| 採用済み

回答済み

how can i calculate z^2 distibution?

Hello JS By gaussian I assume you mean the normal distribution, mean 0, std deviation 'a' f(z) = N*exp(-(z/a)^2/2) with N =...

how can i calculate z^2 distibution?

Hello JS By gaussian I assume you mean the normal distribution, mean 0, std deviation 'a' f(z) = N*exp(-(z/a)^2/2) with N =...

2ヶ月 前 | 0

| 採用済み

回答済み

Solve function returns expression in terms of z

Hello Ashmika, You do have a symbolic solution for h, which goes to show that symbolic solutions are not always the ideal. The...

Solve function returns expression in terms of z

Hello Ashmika, You do have a symbolic solution for h, which goes to show that symbolic solutions are not always the ideal. The...

2ヶ月 前 | 0

| 採用済み

回答済み

How can I get randperm to return a permutation of a vector that has no entries at their original positions?

Hi Darcy, the methods I have seen here seem to involve trying randperm and rejecting the result if an element remains in the sa...

How can I get randperm to return a permutation of a vector that has no entries at their original positions?

Hi Darcy, the methods I have seen here seem to involve trying randperm and rejecting the result if an element remains in the sa...

2ヶ月 前 | 0

回答済み

Imaginary numbers when solving ode (ode15s)

Hello YF, whenever unexpected complex quantities start appearing, it's time to look for the usual suspects, which tend to be ei...

Imaginary numbers when solving ode (ode15s)

Hello YF, whenever unexpected complex quantities start appearing, it's time to look for the usual suspects, which tend to be ei...

2ヶ月 前 | 0

| 採用済み

回答済み

Q Factor is not same

Hello Abdullah be aware that what you are calling alpha is often called alpha/2, but I don't think that had anything to do with...

Q Factor is not same

Hello Abdullah be aware that what you are calling alpha is often called alpha/2, but I don't think that had anything to do with...

2ヶ月 前 | 1

| 採用済み

回答済み

How does nanstd function process complex numbers

Hi Luciano I'm not sure what you are referrng to with " nanstd(C) returns a complex matrix with dimentions equal to C and rea...

How does nanstd function process complex numbers

Hi Luciano I'm not sure what you are referrng to with " nanstd(C) returns a complex matrix with dimentions equal to C and rea...

2ヶ月 前 | 0

回答済み

Power calculation from Voltage and current waveforms

Hi Stefano, The biggest issue is that when using trapz, you have not taken into account the width of the time steps when doing ...

Power calculation from Voltage and current waveforms

Hi Stefano, The biggest issue is that when using trapz, you have not taken into account the width of the time steps when doing ...

2ヶ月 前 | 0

回答済み

FFT and Parseval's Theorem

Hi Chen, Here are a couple of ways. Since the time function fills up the entire time window (as opposed to being some kind of ...

FFT and Parseval's Theorem

Hi Chen, Here are a couple of ways. Since the time function fills up the entire time window (as opposed to being some kind of ...

3ヶ月 前 | 1

回答済み

In the sine wave source is the formula that links samples per period and sample time correct? It says: Samples per period = 2*pi / (Frequency * Sample time), but I believe it should be Samples per period = Sample time / Frequency.

Hello Ilaria, I believe it is neither of those. Rather it is what is in the PNG with the 2pi crossed out: samples/period = 1/...

In the sine wave source is the formula that links samples per period and sample time correct? It says: Samples per period = 2*pi / (Frequency * Sample time), but I believe it should be Samples per period = Sample time / Frequency.

Hello Ilaria, I believe it is neither of those. Rather it is what is in the PNG with the 2pi crossed out: samples/period = 1/...

3ヶ月 前 | 0

回答済み

Need help with this integral ? what is opstruct in integralcalc?

Hello HA I assume N is defined further on up since Matlab was not complaining about that. Try fun_2=@(t)(ones(size(t))*N); a...

Need help with this integral ? what is opstruct in integralcalc?

Hello HA I assume N is defined further on up since Matlab was not complaining about that. Try fun_2=@(t)(ones(size(t))*N); a...

3ヶ月 前 | 0

回答済み

How to obtain the coordinate of the maximum value in the Cross ambiguity function

Hi John, Not having the phased array system toolbox I don't know how the plot axes are oriented, but I think one of the two pos...

How to obtain the coordinate of the maximum value in the Cross ambiguity function

Hi John, Not having the phased array system toolbox I don't know how the plot axes are oriented, but I think one of the two pos...

3ヶ月 前 | 0

回答済み

solving ode equation using ode45

Hi nadeeshani, UPDATED ANSWER This is a speculative answer, but perhaps you did not take the square root when you calculated t...

solving ode equation using ode45

Hi nadeeshani, UPDATED ANSWER This is a speculative answer, but perhaps you did not take the square root when you calculated t...

3ヶ月 前 | 0

回答済み

Why am I only getting partial streamlines.

Hi Boris, the problem is the line sy = sx./sx which creates a vector of ones for sy. Then every streamline originates at the h...

Why am I only getting partial streamlines.

Hi Boris, the problem is the line sy = sx./sx which creates a vector of ones for sy. Then every streamline originates at the h...

3ヶ月 前 | 0

回答済み

Non-Integer For-Loop

Hi Christopher for h = 0:.1:1 works, although with the interval expressed in floating point, you have to be careful. for ...

Non-Integer For-Loop

Hi Christopher for h = 0:.1:1 works, although with the interval expressed in floating point, you have to be careful. for ...

3ヶ月 前 | 1

回答済み

Why is dsolve solution halved from real answer?

Hi Miles, One of your conditions is dy/dt = 0 which is iffy, since there is a dirac delta function at the origin and you are no...

Why is dsolve solution halved from real answer?

Hi Miles, One of your conditions is dy/dt = 0 which is iffy, since there is a dirac delta function at the origin and you are no...

3ヶ月 前 | 4

回答済み

error in computing atanh

Hello Francisco, The imaginary part is i*pi/2, so the two answers are a+i*pi/2 and a-i*pi/2, where a is real. Both answers are...

error in computing atanh

Hello Francisco, The imaginary part is i*pi/2, so the two answers are a+i*pi/2 and a-i*pi/2, where a is real. Both answers are...

3ヶ月 前 | 1

| 採用済み

回答済み

Significance of Nyquist frequency and Maximum frequency THD computation for FFT analysis

Hi Alsher, you don't show the horizontal frequency scale but I believe that the very small peaks have spacing 5 Hz, there are 1...

Significance of Nyquist frequency and Maximum frequency THD computation for FFT analysis

Hi Alsher, you don't show the horizontal frequency scale but I believe that the very small peaks have spacing 5 Hz, there are 1...

3ヶ月 前 | 0

| 採用済み

回答済み

How to calculate error of trapz() function?

Hi Emil, Although there are uncertainties, you can draw some conclusions by using reasonable assumptions. First, you have to b...

How to calculate error of trapz() function?

Hi Emil, Although there are uncertainties, you can draw some conclusions by using reasonable assumptions. First, you have to b...

3ヶ月 前 | 0

回答済み

How do I prevent overwriting of matrix elements?

Hi Domantas This is just a provisional answer since I am not sure exactly what you are trying to do, but statements like H(1:...

How do I prevent overwriting of matrix elements?

Hi Domantas This is just a provisional answer since I am not sure exactly what you are trying to do, but statements like H(1:...

3ヶ月 前 | 0

| 採用済み

回答済み

How do I use acot(x) as a continuous function in matlab?

Hi Michael, I believe that 1/2 - (1/pi)*atan(x) fills the bill. It's the same as (1/pi)*acot(x) for x>0 and is continuous, w...

How do I use acot(x) as a continuous function in matlab?

Hi Michael, I believe that 1/2 - (1/pi)*atan(x) fills the bill. It's the same as (1/pi)*acot(x) for x>0 and is continuous, w...

3ヶ月 前 | 1

| 採用済み

回答済み

3D Plot of particle trajectory in E and B field

Hi Lujain, After setting v = [0 1 1] to provide some initial z velocity, figure(2) plot3(X(:,1),X(:,2),X(:,3)) grid on and ...

3D Plot of particle trajectory in E and B field

Hi Lujain, After setting v = [0 1 1] to provide some initial z velocity, figure(2) plot3(X(:,1),X(:,2),X(:,3)) grid on and ...

3ヶ月 前 | 0

| 採用済み

回答済み

How to Find the Rotation Matrix?

Hi ercan, MODIFIED First of all, for a rotation matrix the two known columns have to be an orthonormal pair, meaning that ther...

How to Find the Rotation Matrix?

Hi ercan, MODIFIED First of all, for a rotation matrix the two known columns have to be an orthonormal pair, meaning that ther...

3ヶ月 前 | 2

| 採用済み

回答済み

Waveform not staring at origin

Hi SA, If you temporarily set c0 = 0 you obtain a nice trapezoidal wave of amplitude 1 that oscillates about y = 0 and has a me...

Waveform not staring at origin

Hi SA, If you temporarily set c0 = 0 you obtain a nice trapezoidal wave of amplitude 1 that oscillates about y = 0 and has a me...

3ヶ月 前 | 0

回答済み

How do I find a D matrix that satisfies [K]*inv(M)*[D]==[D]*inv(M)*[K] ?

Hi Ikram, Using N in place of inv(M) for simplicity, you are looking for a D such that K*N*D = D*N*K Let K*N and N*K have eig...

How do I find a D matrix that satisfies [K]*inv(M)*[D]==[D]*inv(M)*[K] ?

Hi Ikram, Using N in place of inv(M) for simplicity, you are looking for a D such that K*N*D = D*N*K Let K*N and N*K have eig...

3ヶ月 前 | 0

| 採用済み