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Yuval


Active since 2013

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Assistance plotting radiation pattern
I am trying to make a polar plot using the following code yet it doesn't come out as smooth as desired. I'd appreciate some furt...

meer dan 6 jaar ago | 1 answer | 0

1

answer

Question


Plotting reflection coefficient as func. of frequency
Hi, How may I make a similar plot in MATLAB? It's a special Smith Chart showing the normalized load Z = -0.6 + jx, where 0.75<x...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


Why doesn't this code solve the equation?
Hi, I am trying to solve a trigonometric equation for phis using the following code: phi = linspace(0,3*pi/4,1000); sym...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


Plotting equation of two variables
Hi, I'd appreciate some guidance/assistance plotting: y = -sin^3(theta); x = cos^3(theta) All my attempts have produced grap...

bijna 8 jaar ago | 1 answer | 0

1

answer

Question


Shifting a graph without altering the data itself.
Hi, I have the following graph in which I'd like the two curves to coincide as closely as possible. Is there a way to achieve t...

bijna 8 jaar ago | 1 answer | 0

1

answer

Question


Correlating plot's legend and data.
Hi, I cannot figure out why there's no correlation between the legend and the data's colours in the following code: fi...

bijna 8 jaar ago | 1 answer | 0

1

answer

Question


How to draw a polar graph from r=0?
Hi, The following code draws the polar graph in the attachment. The problem is that this graph should begin at r=0, whereas it ...

bijna 8 jaar ago | 1 answer | 0

1

answer

Question


Polarplot in dB.
Hi, I am trying to plot a certain function (traveling wave) using polarplot(). However, the result isn't even close to that pre...

bijna 8 jaar ago | 1 answer | 0

1

answer

Question


Problem calling patternCustom() - undefined function.
I get the following error message upon calling patternCustom in MATLAB R2016a: Undefined function or variable 'patternCustom'. ...

bijna 8 jaar ago | 0 answers | 0

0

answers

Question


Radiation pattern plotting.
Hi, I am having difficulties plotting the following function: theta = -2:0.01:2; y = (cos(pi/4*cos(theta*pi))-cos(p...

bijna 8 jaar ago | 6 answers | 0

6

answers

Question


Problem plotting sinc function.
Hi, I'd like to plot the following function: 400/pi*sinc^2(20sin(x))*cos^2(x) for x between -0.5 and 0.5. To that end, I wro...

bijna 8 jaar ago | 1 answer | 0

1

answer

Question


Fit to Gaussian with errors.
Hi, I'd like to fit a Gaussian to a set of x,dx,y,dy data, but am unable to do so. Would truly appreciate some assistance. It s...

bijna 11 jaar ago | 0 answers | 0

0

answers

Question


Bisection method code - question.
Hi, I wrote the following function for solving V=L[arccos(h/r)r^2 - h(r^2-h^2)^0.5] using the bisection method. However, as ...

bijna 11 jaar ago | 1 answer | 0

1

answer

Question


How to avoid a loop using vectors?
Hi, Is there a way to avoid using a for loop (or any loop for that matter) in the following?: h=(10^-1).^[1:8]; x=pi; ...

ongeveer 11 jaar ago | 1 answer | 0

1

answer

Question


Approximating derivative and plotting error.
Hi, I'd sincerely appreciate it if someone were willing to review the few lines of code below and indicate why they don't quite...

ongeveer 11 jaar ago | 1 answer | 0

1

answer

Question


Help plotting interpolation ploynomial.
Hi, I was asked to plot psi_n(x) = (x-x_0)(x-x_1)...(x-x_n) for n = 3,7,10,17 evenly distributed nodes in [-5,5] with resolutio...

ongeveer 11 jaar ago | 1 answer | 0

1

answer

Question


Plotting several values returned by a function.
Hi, I wrote the following function for the interpolation polynomial of log(x): function pol = Lagrange1(x) dim1 = [1, 2...

ongeveer 11 jaar ago | 1 answer | 0

1

answer

Question


Finding minimum value satisfying a constraint.
Hi, I'd like to use MATLAB to determine the smallest value of n satisfying: 3^(-n) * 3^n != 1 I am advised to use min(x)/max(...

ongeveer 11 jaar ago | 0 answers | 0

0

answers

Question


How to form an array of sums?
Hi, I am asked to evaluate the following sum S=Sigma(n=0 to N) x^n/n! (namely, e^x as n->Inf) for N=10:10:100 and x=10, so th...

ongeveer 11 jaar ago | 1 answer | 0

1

answer

Question


How to evaluate sigma (summation) expression using meshgrid() and sum()?
I would like to evaluate the following expression using functions meshgrid, sum and dot operations: y = Ʃ(n=1 to N) xn*[cos(x2 ...

meer dan 11 jaar ago | 1 answer | 0

1

answer

Question


How to permute a row vector without using perms(), permute() etc.
I would like to permute a row vector, but without using perms(), permute() and so forth. I was wondering whether the following c...

meer dan 11 jaar ago | 1 answer | 0

1

answer

Question


How to code a function for solving equation by iteration?
I'd like to write a function which calculates the pressure drop given by: P = (1/2)*rho*omega^2*(L/D)*lambda where rho -...

meer dan 11 jaar ago | 0 answers | 0

0

answers

Question


How to plot six concentric circles using meshgrid and plot?
I am trying to plot six concentric circles using meshgrid() and plot(). The circles' radii vary between 0.5 and 1.75 (with inter...

meer dan 11 jaar ago | 1 answer | 0

1

answer

Question


How to generate a matrix of random integers from 55 to 100?
Using function rand, should a matrix of random integers in the interval [55..100] be generated thus: M = ceil((rand(5,5)+(11/...

meer dan 11 jaar ago | 3 answers | 1

3

answers