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I want to calculate some function using PSO algoritm. but it doesn't work please help me.
Yu are trying to do element by element multiplication of a vector that has 7 elements (x) by a vector that has 12 elements (G/Gr...

5 years ago | 0

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Loop answers slightly out from correct values
Are the differences significant? We are unable to check all the numbers that went into the calculations given in the text. The...

5 years ago | 2

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Help for xtick label
Add this line just above your xticklabels line. hAx1.XTick=[8.3333*10^6 1.25*10^7 1.67*10^7 2.08*10^7 2.5*10^7];

5 years ago | 1

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Answered
Solving nonlinear equations that include integrals with embedded variables
If Dana's suggestion doesn't work, the following non-symbolic approach does: theta0init = pi/2; theta0 = fzero(@intfn, theta0i...

5 years ago | 0

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how to modify a fitted model
1. To get continuous fit lines, Instead of plot(x1,y1_fit,'r-') do something like x = min(x1):max(x1); y = polyval(p,x); pl...

5 years ago | 0

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how to developed numerical code for collocation method for linear differential equations
I've just noticed you want to use a collocation method. So you proceed as follows % For method of collocation choose a function...

5 years ago | 0

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Solve first order nonlinear ODE
The value of x increases far too quickly, and reaches a value beyond the numerics ability to cope with when x(0) > 2. Works ju...

5 years ago | 0

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Finding Minimum value of an anonymous function using fminbnd
You don't need fminbnd to find the minimum of G. Just min(G(na)) will do it (or am I missing something?).

5 years ago | 0

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I am trying to store every value into a 1D Array from a for loop
It's difficult to tell exactly what you are trying to do, but perhaps the following is close to what you want: ArrayPhi = zeros...

5 years ago | 0

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How do I fit gaussian function to data whose only information I have is the minimum, maximum and number of data points?
All you can reasonably do is assume the maximum and minimum are a certain number of standard deviations ( say 6 sigma) away from...

5 years ago | 0

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Check for missing argument or incorrect argument data type in call to function 'fit' - using two 1x15 double arrays as an input argument
Here's a way of fitting a simple exponential curve. However, you definitely don't want to use it to extrapolate! year=[1991,19...

5 years ago | 1

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How to solve the following equations for Vc(t)?
Can you do it using the differential form of the relationship between Vc and Ic? Something like the following (obviously, you w...

5 years ago | 0

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How to solve the ODE based 1D heat equation with arbitrary optical heat source term?
Here's a possible solution. I've assumed the temperatures are symmetric about the midpoint. I've extracted data from your file ...

5 years ago | 1

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How to plot a restoration-based envelope in matlab
Here's a "starter for ten"! I've used approximate time intervals: T = t(end)/10; % period - there seem to be 10 periods...

5 years ago | 0

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Converting a maximizing problem into a minimizing program using linprog
Minimize -x. The maximum of x will then be the negative of this.

5 years ago | 0

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Plot only equilateral triangles
Here's an alternative approach: e = 0.01; for i = 1:10 xc = rand(1); yc = rand(1); r = rand(1); while r < e/sq...

5 years ago | 1

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Fixed-bed adsorption
Do you just need a finer mesh? See: epsilon = 0.62; % Voidage fraction Kc = 4.5542e-5; % Mass Transfer Coefficient Kl = 2...

5 years ago | 2

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Solving LTID system recursively
Matlab indexing begins at 1, so you can't have y(-2), y(-1), y(0) etc. Shift your indexing. y(1) = 2; y(2) = 3; for k = 3: l...

5 years ago | 0

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How to divide each column in array 1 by corresponding column in array 2 and put answers in new array, array 3
Try Transmittance = SPFPMTSignal ./ SkinPMTSignal Notice the dot before the backslash. It means element by element division.

5 years ago | 0

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Write a matrix to txt file
Try this: gamma =[1.85506173843200, 1.00229272121327; 1.74935758533076, 1.00727718522748; 1.54993783446447, 1...

5 years ago | 0

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How to solve an equation with the variable on both RHS and LHS?
Like this for example (obviously, you will need to replace my arbitrary data with your actual data): OF = 2.4; wbar = linspace...

5 years ago | 0

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How can I generate random Student t numbers?
The easiest way is to use the Statistics toolbox. If you don't have access to that then search Matlab's File Exchange, where th...

5 years ago | 0

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Plot an equation: variable inputs
Just a slight modification of the routine in your previous post is needed! Cfn = @(CdB) 10.^(CdB/20); Mfn = @(C,T) (C./(1-T.*(...

5 years ago | 0

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Why is this break not executing for the summation of pi
PrevSum/pie should tend to 1. abs(PrevSum - pie) should get smaller than 10^-8. Try pie = 0; k = 0; err = 1; while err>10^...

5 years ago | 0

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Solve ODE for variable domain
So you would then call your ode with something like: [x,Y] = ode45(@nozzlesinglebobb, xspan, Y0,[],xstartconica,xfineconica,Ral...

5 years ago | 0

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3/8 Simpson's Rule
The result of integrating of your function between 0 and 1 is: I = (exp(1)^2*(2*sin(5)-5*cos(5)) + 5)/29; so relative error is...

5 years ago | 1

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Remembering Variables In for Loop
for i=1:no_of_values x(i)=input(['Enter the value of x_ ',num2str(i)]); y(i)=input(['Enter the value of y_ ',num2str(...

5 years ago | 0

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Inline to Anonymous Function
Simply replace your x = inline... etc expression with x = @(t) 5*sin(2*pi*1*t).*exp(-.4*t);

5 years ago | 0

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Received Power Vs Distance
If Z is distance then you should probably have Pr=Pt*Gt*Gr*lambda^2./(16*pi^2.*Z.^2); Note the position of the parentheses. I...

5 years ago | 0

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Answered
plot lines not showing up
You were overwriting P all the time, instead of storing all the values: R=287; r=1.4; Mach=[2:0.5:6]; for i=1:9 M=Mach(...

5 years ago | 0