photo

Alan Stevens


Last seen: Today Actif depuis 2020

Followers: 1   Following: 0

Statistiques

  • 36 Month Streak
  • Guiding Light
  • Knowledgeable Level 5
  • First Answer

Afficher les badges

Feeds

Afficher par

Réponse apportée
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...

5 jours il y a | 0

Réponse apportée
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...

19 jours il y a | 1

| A accepté

Réponse apportée
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...

20 jours il y a | 0

| A accepté

Réponse apportée
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.

environ un mois il y a | 0

Réponse apportée
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...

environ 2 mois il y a | 0

Réponse apportée
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...

environ 2 mois il y a | 0

Réponse apportée
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...

environ 2 mois il y a | 0

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

3 mois il y a | 1

| A accepté

Réponse apportée
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...

3 mois il y a | 0

Réponse apportée
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...

3 mois il y a | 0

Réponse apportée
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!

3 mois il y a | 0

| A accepté

Réponse apportée
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...

3 mois il y a | 0

Réponse apportée
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 ...

3 mois il y a | 0

| A accepté

Réponse apportée
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...

4 mois il y a | 2

| A accepté

Réponse apportée
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)];...

4 mois il y a | 1

Réponse apportée
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 = ...

4 mois il y a | 0

Réponse apportée
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...

4 mois il y a | 0

| A accepté

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

4 mois il y a | 0

| A accepté

Réponse apportée
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...

5 mois il y a | 0

| A accepté

Réponse apportée
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...

5 mois il y a | 0

Réponse apportée
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...

5 mois il y a | 1

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

5 mois il y a | 0

Réponse apportée
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...

5 mois il y a | 0

| A accepté

Réponse apportée
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...

6 mois il y a | 0

Réponse apportée
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 ...

6 mois il y a | 0

| A accepté

Réponse apportée
Two graphs in the same plot, why?
You have the hours as one plot and the minutes as the other! Turn the data into all minutes, or all hours first.

6 mois il y a | 0

Réponse apportée
Could anyone help me in fixing the problem in my code for solving the initial value problem numerically: y'=y^2, y(0)=1?
Here's an attempt using fminsearch. I don't know anything about the Obreschkoff method, so couldn't say if your equations are...

6 mois il y a | 0

| A accepté

Réponse apportée
I get this message(Attempted to access F(5); index out of bounds because numel(F)=4.) when I run the code below..
In fsode you try to use F(7) when calculating F(5), before you have calculated F(7)!

6 mois il y a | 1

| A accepté

Réponse apportée
Laser Rate Equation Modelling
Like this? (Look at lines 27, 28 and 38) %Script % Define model parameters temperature = 25; wavelength = 1.312e...

6 mois il y a | 0

Réponse apportée
Determine the coordinates of the nodes forming the outermost circle
Here's an alternative way: nodes = importdata("nodes.mat"); figure plot3(nodes(:,1),nodes(:,2),nodes(:,3),'b.','Markersize',1...

6 mois il y a | 0

Charger plus