Risposto

What are the point locations for EHfields() function output?

Hi XC, I don't have the antenna toolbox but there are definite indications that they are using the sphere command. Sphere has ...

What are the point locations for EHfields() function output?

Hi XC, I don't have the antenna toolbox but there are definite indications that they are using the sphere command. Sphere has ...

4 mesi fa | 0

| accettato

Risposto

Antenna Element Calibration File Size Calculation

Hi John, assuming the required memory is the product of those four factors, then if these are 64 bit floating point real number...

Antenna Element Calibration File Size Calculation

Hi John, assuming the required memory is the product of those four factors, then if these are 64 bit floating point real number...

4 mesi fa | 0

Risposto

Reciprocity mismatch using geodetic2aer and aer2geodetic

Hi Leonardo, There is no reason for the reciprocity you mentioned to hold true. This has to be the case since the aer coodinat...

Reciprocity mismatch using geodetic2aer and aer2geodetic

Hi Leonardo, There is no reason for the reciprocity you mentioned to hold true. This has to be the case since the aer coodinat...

4 mesi fa | 0

Risposto

Can I assign vectors with different number of rows per-column to a matrix?

Hi Abdallah, Cell arrays are very versatile but they are also on the slow side. Depending on what you are doing, that may not ...

Can I assign vectors with different number of rows per-column to a matrix?

Hi Abdallah, Cell arrays are very versatile but they are also on the slow side. Depending on what you are doing, that may not ...

4 mesi fa | 0

Risposto

How do I solve this ODE system where there exists derivatives in both sides?

Hi Arda, These two equations are of the form p' Jxx - r' Jxz = f(...) where ... = p,q,r,J,J,M,M (a bunch of known stu...

How do I solve this ODE system where there exists derivatives in both sides?

Hi Arda, These two equations are of the form p' Jxx - r' Jxz = f(...) where ... = p,q,r,J,J,M,M (a bunch of known stu...

5 mesi fa | 0

| accettato

Risposto

How can I create randomly scattered points between two circles?

(At Adam's suggestion I moved my previous comment to this answer) What tells the tale is the differential area element in the (...

How can I create randomly scattered points between two circles?

(At Adam's suggestion I moved my previous comment to this answer) What tells the tale is the differential area element in the (...

5 mesi fa | 3

Risposto

Hi, everyone! I have a question about generating random meshgrid.

Hello yc, If you are willing to make an approximation to the area of each grid quadrilateral then I think there is a reasonably...

Hi, everyone! I have a question about generating random meshgrid.

Hello yc, If you are willing to make an approximation to the area of each grid quadrilateral then I think there is a reasonably...

5 mesi fa | 0

| accettato

Risposto

Voltage peaks after opening of a contactor in an inductive circuit

Hello Ivan, I'm not sure how you obtain 17.5kV from 500A and 50ns, and 50ns seems really fast if the contactor is mechanical, b...

Voltage peaks after opening of a contactor in an inductive circuit

Hello Ivan, I'm not sure how you obtain 17.5kV from 500A and 50ns, and 50ns seems really fast if the contactor is mechanical, b...

5 mesi fa | 0

| accettato

Risposto

How to perform a coordinate transformation in a function?

Hi Kovacs Here is one way. Clearly x^2 + t^2 = xi^2 by inspection, so that factor, which is common to both terms, can be sav...

How to perform a coordinate transformation in a function?

Hi Kovacs Here is one way. Clearly x^2 + t^2 = xi^2 by inspection, so that factor, which is common to both terms, can be sav...

5 mesi fa | 1

| accettato

Risposto

How can I write "StruveL function" in matlab?

Hello Shreen, Here are two ways although you will need the symbolics toolbox for the first one. I used benign values for z and...

How can I write "StruveL function" in matlab?

Hello Shreen, Here are two ways although you will need the symbolics toolbox for the first one. I used benign values for z and...

6 mesi fa | 0

| accettato

Risposto

This code runs except the graph and results are incredibly wrong

Hi Connor, The reason your code is going to 10^26 is that you are missing an important factor on the last line of rk4, which is...

This code runs except the graph and results are incredibly wrong

Hi Connor, The reason your code is going to 10^26 is that you are missing an important factor on the last line of rk4, which is...

6 mesi fa | 0

| accettato

Risposto

How to find the max Phase lead provided by a Compensator?

Hi Gidel, It's not a single command and it's numeric, but is w = 0:.001:10; maxangle = (180/pi)*max(angle((i*w+1)./(i*w+3))) ...

How to find the max Phase lead provided by a Compensator?

Hi Gidel, It's not a single command and it's numeric, but is w = 0:.001:10; maxangle = (180/pi)*max(angle((i*w+1)./(i*w+3))) ...

6 mesi fa | 1

Risposto

impedance matching single stub

Hi Moza, You have most of it, but you need to add a step and change a sign error. The section terminated by R and C, I called ...

impedance matching single stub

Hi Moza, You have most of it, but you need to add a step and change a sign error. The section terminated by R and C, I called ...

6 mesi fa | 0

| accettato

Risposto

11 kV phase to phase voltage, what is the value of phase to ground voltage?

Hi N^2 I believe the result should be Vgnd = 11000/sqrt(3) = 6351 V. However, if the 11000V is RMS, and the voltage to ground ...

11 kV phase to phase voltage, what is the value of phase to ground voltage?

Hi N^2 I believe the result should be Vgnd = 11000/sqrt(3) = 6351 V. However, if the 11000V is RMS, and the voltage to ground ...

6 mesi fa | 0

Risposto

5 equations, 5 unknowns using fsolve; with scientific variables

Hi Kaushal, looks like 6 eqns 6 unknowns not 5. All of your unknowns appear in the numerators of the given expressions and no...

5 equations, 5 unknowns using fsolve; with scientific variables

Hi Kaushal, looks like 6 eqns 6 unknowns not 5. All of your unknowns appear in the numerators of the given expressions and no...

6 mesi fa | 0

Risposto

Finding Coefficients for the particular solution

Hi Tashanda, let u and v be 2x1 vectors with the coefficient of cos as first element, coefficient of sine as second element, an...

Finding Coefficients for the particular solution

Hi Tashanda, let u and v be 2x1 vectors with the coefficient of cos as first element, coefficient of sine as second element, an...

7 mesi fa | 0

| accettato

Risposto

Power Spectrum estimate using pwelch function

Hi Matthew, I don't think there is an issue here, exactly. pxx_hamming1 is the default psd for pwelch. If you take pxx_hammin...

Power Spectrum estimate using pwelch function

Hi Matthew, I don't think there is an issue here, exactly. pxx_hamming1 is the default psd for pwelch. If you take pxx_hammin...

8 mesi fa | 1

Risposto

Does MATLAB considers poles while COMPLEX integrating a function?

Hi simran, Yes, the 2F1 expression does consider the pole, as you can see by the fact that the expression gets large as z appoa...

Does MATLAB considers poles while COMPLEX integrating a function?

Hi simran, Yes, the 2F1 expression does consider the pole, as you can see by the fact that the expression gets large as z appoa...

8 mesi fa | 1

| accettato

Risposto

making a 4 x 3 matrix with elements from a 3x7 matrix

Hi Brandon, m1 = rand(3,7) m2 = m1(:,[1 3 4 5]).' m1 = 0.0357 0.6787 0.3922 0.7060 0.0462 0.6948 0...

making a 4 x 3 matrix with elements from a 3x7 matrix

Hi Brandon, m1 = rand(3,7) m2 = m1(:,[1 3 4 5]).' m1 = 0.0357 0.6787 0.3922 0.7060 0.0462 0.6948 0...

8 mesi fa | 0

| accettato

Risposto

why FFT result and IFFT result has diffrent in very small value? how to avoid this to increase precission?

Hi nirwana, This is totally normal behavior, just computation being computation. Matlab uses double precision arithmetic with ...

why FFT result and IFFT result has diffrent in very small value? how to avoid this to increase precission?

Hi nirwana, This is totally normal behavior, just computation being computation. Matlab uses double precision arithmetic with ...

8 mesi fa | 0

| accettato

Risposto

Finding positive-, negative- and zero-sequence components in Matlab

Hi Ygor, I believe the problem is that you are going too soon to real values for Ua,Ub,Uc. In Ua = ((exp(1i.*w1.*t)+exp(-1i.*...

Finding positive-, negative- and zero-sequence components in Matlab

Hi Ygor, I believe the problem is that you are going too soon to real values for Ua,Ub,Uc. In Ua = ((exp(1i.*w1.*t)+exp(-1i.*...

9 mesi fa | 1

| accettato

Risposto

How to solve such integrations on MATLAB?

Hi simran, for any general function f(z) and a set of points [z1, z2, z3 ...] that describes a path in the complex plane (not n...

How to solve such integrations on MATLAB?

Hi simran, for any general function f(z) and a set of points [z1, z2, z3 ...] that describes a path in the complex plane (not n...

9 mesi fa | 0

Risposto

How to do LU factorization without permutation？ The lu() is with permutation.

Hi Alvin Certainly you can do the decomposition without permutation, just not with Matlab lu. (Why you might want to is a diff...

How to do LU factorization without permutation？ The lu() is with permutation.

Hi Alvin Certainly you can do the decomposition without permutation, just not with Matlab lu. (Why you might want to is a diff...

9 mesi fa | 1

Risposto

Period of a Linear Congruential Random Number Generator

HI William. If you're still listening, then if you are only interested in the period and not all of the values of x along the w...

Period of a Linear Congruential Random Number Generator

HI William. If you're still listening, then if you are only interested in the period and not all of the values of x along the w...

9 mesi fa | 0

| accettato

Risposto

Dot product of two vector

Hello Syazana syms c1 s1 n1 n2 n3 a1 a2 a3 real A = [c1 -s1 0; s1 c1 0; 0 0 1] A = [c1, -s1, 0] [s1, c1,...

Dot product of two vector

Hello Syazana syms c1 s1 n1 n2 n3 a1 a2 a3 real A = [c1 -s1 0; s1 c1 0; 0 0 1] A = [c1, -s1, 0] [s1, c1,...

9 mesi fa | 0

| accettato

Risposto

Solve the integral in the point where the function is singular

Hi Dimani, Leaving out the first '1 ' term that has no singularity and leaving off some constants, you are basically looking at...

Solve the integral in the point where the function is singular

Hi Dimani, Leaving out the first '1 ' term that has no singularity and leaving off some constants, you are basically looking at...

9 mesi fa | 0

Risposto

How to generate a noise which sums up as zero?

Hi Ananta, noise=randn(1,64)*sqrt(0.001)*240 noise = noise - mean(noise); if you subtract off the mean, then the new sum of t...

How to generate a noise which sums up as zero?

Hi Ananta, noise=randn(1,64)*sqrt(0.001)*240 noise = noise - mean(noise); if you subtract off the mean, then the new sum of t...

10 mesi fa | 0

Risposto

Trying to use modified secant method to solve for a theta over different g values.

Hi Carson, let b = g*d^2/(2*v^2) % a distance then your equation (multiplied by -1) is b/cos^2 - d*tan - y = 0 plug in ...

Trying to use modified secant method to solve for a theta over different g values.

Hi Carson, let b = g*d^2/(2*v^2) % a distance then your equation (multiplied by -1) is b/cos^2 - d*tan - y = 0 plug in ...

10 mesi fa | 0

Risposto

I require frequency response from transfer function = 1/(s^2+(b/m)*s+k/m) where b= 0.0011, k= 87.88 , m = 0.99 in matlab and i need freq in khz

Hi sia, there is not much need to do any detailed calculation when your starting point is what it is. This system has a small a...

I require frequency response from transfer function = 1/(s^2+(b/m)*s+k/m) where b= 0.0011, k= 87.88 , m = 0.99 in matlab and i need freq in khz

Hi sia, there is not much need to do any detailed calculation when your starting point is what it is. This system has a small a...

10 mesi fa | 0

Risposto

Difference between 2 orientations

Hello Jonathan, You have two 3x3 rotation matrices, each expressed in terms of euler angles, Rrpha(:,1:3) = [cp.*ch, -sp, cp...

Difference between 2 orientations

Hello Jonathan, You have two 3x3 rotation matrices, each expressed in terms of euler angles, Rrpha(:,1:3) = [cp.*ch, -sp, cp...

11 mesi fa | 0