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adding numbers in an M file
sum(f) (after the loop)

15 years ago | 0

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Matrix of Galois Field Elements
You must have a different version of MATLAB than I do (2010b). The error message I get is: ??? Error using ==> gf.gf at 66 X ...

15 years ago | 1

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Solving a differential equation
If your equations contain only linear combinations of the derivatives, you could formulate it as a mass matrix problem |M(t,y)y'...

15 years ago | 1

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evaluate expression
It would be simpler to provide |y| and solve for |x|: y = -1:0.01:1; x = y.*exp(- (1-y)./(A*y)*B ); In plotting this, y...

15 years ago | 0

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Double sigmoid fit
Here is an example of how you could use |cfittool| to create a sigmoid fit. First, enter these commands in the Command Window. ...

15 years ago | 0

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Answered
Plot symbolic polynomial
This plots the real part of |y| against |x|: syms x y ezplot(y-x^2-1i-2) Of course, it looks just the same as syms x y ez...

15 years ago | 0

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Answered
Do you suffer from keyboard latency in this forum?
Here is an approach that I hope will make life easier for people with keyboard latency that is not too extreme. I used it to wri...

15 years ago | 1

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Solving a differential equation
I have been floundering a bit with this problem, but now I see what you need: a variable z = [y; g] with y'(t) = (g-a)*y(t) ...

15 years ago | 1

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Apply colormap to plot(x,y)
To create the colormap, you could use |spectrumRGB| in <http://www.mathworks.com/matlabcentral/fileexchange/7021 Spectral and XY...

15 years ago | 1

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Answered
Availability PDF
A PDF doesn't have to be restricted to 100% (or 1, as I usually think of it) - as long as the integral of the PDF is 1, it's o.k...

15 years ago | 0

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Combining 2 different models
out1 = model1(in1); out2 = model2(out1,otherVariables);

15 years ago | 0

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Solving a differential equation
If I understand your question, you have a delay differential equation with one variable y(t), and your equation has the form y'(...

15 years ago | 0

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How to avoid NaN with numerical integration (quadrature)
If you set a debugging breakpoint at the call where the warning occurs, then Futpd(LimInf_) ans = NaN *EDIT*: The ...

15 years ago | 1

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Second derivative of Gaussian function
Sure: syms yo A w X c Gaussian=yo+A/w*exp(-((X-c)/w)^2); diff(Gaussian,w,2) I have cleaned up some redundancy in your expres...

15 years ago | 0

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A problem using ode23s and lsqcurvefit
You need to learn some debugging techniques. Look at <http://www.mathworks.com/help/techdoc/matlab_env/brqxeeu-151.html Preventi...

15 years ago | 0

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pde solver
This would be hard to solve numerically because it is ill-defined. Any function of the form |f(c*z-b*t)| is a solution.

15 years ago | 0

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Minimization falls in wrong minima
This problem seems under-constrained. A rotation matrix |R| should satisfy |R.' = inv( R )| and should have a total of three ind...

15 years ago | 0

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Output values from a loop
Do you use the MATLAB Editor? You should because it has some very useful diagnostics. Look at the right margin of the editor and...

15 years ago | 0

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Create plot with specified handle?
I doubt it. If you could create one plot with handle |32|, you could create another, and then it wouldn't be unique any more. Th...

15 years ago | 0

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Odd triangles using Matlab's contour and contourf functions
I think your main problem is that there aren't many data, so it is hard to make nice contours out of it. Look at the bit-mapped ...

15 years ago | 0

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Answered
plot transperant 3d sphere
As you suggested yourself, you can use |sphere| to generate the sphere: r = 24.04; [x,y,z] = sphere(50); x0 = 16.5; y0 = 14.8...

15 years ago | 5

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Any idea on how to create a n by n square matrix.
Use |meshgrid|: npanels=3; %number of panels dP=2.4/npanels; %equal length panels P=[-1.2+(2.4/npanels)/2:dP:1.2-(2.4/npa...

15 years ago | 2

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How to multiply a vector with each column of a matrix most efficiently?
I don't find that. If my input is clear t=(1:1000)'; A=rand(length(t),200); [n,m] = size(A); %% 1. Looping tic for...

15 years ago | 0

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I need help.
Thank you for formatting it. Do you use the MATLAB editor? It displays syntax errors on the right margin as red lines. You can ...

15 years ago | 1

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Why is it used?
As written, your code cannot possibly run because of some of the spaces. I will substitute underlines: I=find(and(dR > min...

15 years ago | 0

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resolution of PDE
Here is one error: in this line, pl = [C1(1);q0-Cl(2)]; the first |C1| is |C| followed by the numeral |1|, but it should...

15 years ago | 0

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Using MATLAB with Chessboard arrangements problem
If the positions don't need to be legal, you can use combinatorial calculations. For example, let's first suppose that you can't...

15 years ago | 1

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Load a Text File in a GUI
Based on your description of the file, this code might be able to read the file: fid = fopen('testInput.txt'); data2 =...

15 years ago | 0

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Answered
Incorrect equilibrium values using fsolve
The answer provided by |fsolve| looks better than yours: >> odefun_dynamic_droop([2.6605e-07 3.6300e-06 2.5009e-06]) a...

15 years ago | 0

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Find the Error - FZero Function. Constant loop.
The root of the problem is that you're trying to solve for |NCons = NFirm| by minimizing each of these functions at each step. T...

15 years ago | 0

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