Alan Stevens

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Implementation of the analytical expression for the magnetic field of a circular current loop and interpretation/representation of the results
When I run it I get different signs as well as slightly different magnitudes: %% Analytical calculation of the magnetic field o...

12 dagar ago | 0

How to remove gaps in timeseries plot to have a continuous graph
Include a NaN in the data list between each data set.

14 dagar ago | 0

what the reason behind roundoff error inside while loop
Compare the following dt = 0.1*16^-1; t = 0; while t<1 t = t+dt; end disp(t) t = 0; c = 1; while t<1 t = c...

22 dagar ago | 0

Something doesn't work for me in fit
Here's a fit using fminsearch (I just used a quick but coarse approach- the code can be made much cleaner!). v=[10 30 5...

27 dagar ago | 0

Plotting while skipping the middle point in a vector
Something like this? tic v1 = [1 2 3 4 5 8 9 10 20 21 22 30 31 32]; dv = diff(v1); ix = find(abs(dv)>1); v = []; s2 = 0; f...

ungefär en månad ago | 1

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help with nested loop and plot
Here's another way, still using nested loops: n= 101; x = linspace(-100, 100, n); y = linspace(-100, 100, n); [X, Y] = meshg...

ungefär en månad ago | 0

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How to integrate an implicit acceleration function to a fitting pair of graphs of velocity and displacement
Look up ode45 for the integration (for a fixed set of parameters) and fminsearch for fitting the parameters to known data.

ungefär 2 månader ago | 0

Brush: How can I change the font color of the displayed X and Y range?
Select the Property Inspector, select the text, choose a color. (The following code is just to get the image uploaded) I=imrea...

how to use an integral function inside a for loop? i need to find the value of function that chages as i chages .then using this values i need to find another integral.
Are you looking for something like this? r0 =0.1; u =[1:7]'; Q =zeros(length(u),1); E =zeros(length(Q),1); Q = @(x)0.023*(r...

Simpson integral - problem with writing the formula
Should be x(i) etc. not a(i). Also be careful with brackets. % Test 1 a = 0; b = 1; n = 10; f = @(x)1-x+x.^3; I = simpson(f...

How do I apply iteration method to an integral?
Look up help on function fzero.

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How can I plot a reflection angle of a projectile in a kinematics model? Overlay projectile motion plots?
Surely you only need to reverse the x-velocity? imperialBallVelocity = 52.20; release_angle = 42; release_height = 64.2; %Ki...

Why am I receiving this error?
You have 4 layers layer_angles = [45, -45, -45, 45]; but data for only three mid_plane_strains = [0.05, 0.00, 0.00]; % Mid-p...

Function g Returns Only 2 Values Instead of Array - Vectorized Operation Issue in MATLAB
You have g as a function of x2, but x2 doesn't appear on the right-hand side!

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Solve for x with given equation
Look up the help on function fzero. And don't forget that Matlab doesn't recognise implicit multiplication. x(...) should...

power method with rayleigh coeff
Make sure you call the function with the arguments in the same order as those defined in the function! A=[4 1 -1 0;1 3 -1 0;-1 ...

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Fill area between two vertical curves
Like this: value = [186.7646 198.4115 191.1406 180.8430 175.7136 ... 167.7459 151.2865 144.5964 139.8148 139.4305 188.2865 204...

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Simplificar el resultado como valor numerico
Why not simply: p1=[2;3] ; x0_1=@(theta) [cos(theta); sin(theta)]; % =[x1*x0; x1*y0] y0_1=@(theta)[-sin(theta); cos(theta)];...

Optimizing code for HAC Weight matrix generation - How to be faster?
Try replacing the loops with something like this: i = (1:size(Weight_correlation,1))'; j = 1:size(Weight_correlation,2); c = ...

How to a create a label at the bottom of a vertical line?
Like this? x = linspace(0,6,100); y = exp(x); plot(x,y) xline(4.5,'-',{'Acceptable','Limit'}, 'LabelVerticalAlignment', 'bot...

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Secant method Nan Error
You haven't updated error in your while loop. Try including something like error = abs(X0-X1);

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Function error in ODEs RK4 method, solving 6 unknowns
It works for me (I've commented out the fprint statements in the code below - but it works with them in!): global CDin psi thet...

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I keep getting the error using '/'.
Try mu_ratio=(1-(vol_frac(c,1)/0.605).*((particle_ratio(c,1)).^1.2)).^(-1.5125); Notice the dots! .* .^ Difficult to be...

Plateau followed by one phase decay
Like this? x = 0:0.5:20; % time in seconds Y0 = -0.6; % signal baseline value Plateau = -1; % singnal plateu after trigger/st...

Radiation view factor using Monte Carlo
I think you probably need cos(theta), rather than theta, to be linearly spaced.

How to fix a syntax in the oscillator's plot code?
Like this (both x_1 and x_2 are contained in y) T0 = 10; omega0 = 1; M = 1; F = 1; x_1 = 0; x_2 = 0; x_0 = [x_1 x_2]; ts...

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ODE45has long runtime and graph will not plot
Here's my attempt to make sense of your equations tauspan = 0:100:10000; % p0 = [0.5 0.5 0 0]; % dp1dt = -rf + rr % dp2...

Two graphs in the same plot, why?
Something like this data = xlsread('sunHoursInTrollhattan.xlsx'); mins = data(:,1)*60 + data(:,2); plot(1:12, mins,'o'),grid ...

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