Answered
Determinant of a unitary matrix
Gosh. I wonder, if there were really much better ways to compute the determinant, they might have used it? ;-) There are no spe...

8 jours ago | 0

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Answered
How to remove duplicates from a matrix without using unique?
How could you use the output of a sort to help? Why not make an effort?

8 jours ago | 1

Answered
Can anyone tell what is this line doing
You asked again, why you cannot use f(1,3), instead of f(1,2). LOOK CAREFULLY AT WHAT YOU HAVE. TAKE IT ONE STEP AT A TIME. f...

8 jours ago | 0

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Answered
Create Random Points in Elliptical Belt
If you already know how to generate random points uniformly over an elliptical region, then you already have the simple answer. ...

8 jours ago | 0

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Answered
Exponential distributed random values
You need to do that since your exponential rate parameter varies. If it were constant, this would not be necessary. The first a...

9 jours ago | 0

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Answered
How can I solve the determinant of large-sized symbolic matrix: det(A)=0?
First, you don't want to solve for a zero determinant! Period. This will never be a well-posed problem, simply because we can tr...

9 jours ago | 0

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Answered
Composite Simpson's 1/3 rule code error
Tell me, what is fx? fx is NOT a function. It is a scalar, vector, or array. Whatever x was, fx is the same thing. If it NOT a ...

10 jours ago | 0

Answered
Creating a Matrix of random numbers
randi([0 1],20)*2 - 1

10 jours ago | 1

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excluding a small combinations from a combination?
There are not that many combinations that include the subset [2 4 6] out of nchoosek(1:10,4). This means the oversampling will n...

10 jours ago | 0

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How to plot a complex function in matlab like : f(z)=sin(z)?
The problem is, if z is a complex variable, then so is the extension of sin(z) into the complex plane. For example... sin(1 + i...

10 jours ago | 1

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Integration of a function
It can be confusing at times I have seen for newcomers to know which tools apply where, because we have symbolic tools and numer...

10 jours ago | 0

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Answered
what does this line do
It does nothing on its own. A single line of code has little meaning, out of context. What does it do? It sets some elements o...

11 jours ago | 0

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Matlab solver for natural log equation
Does a solution near(er) to zero exist? PLOT IT!!!!!! syms x f = (-27109/x)-0.95*log(x)+25.18 - log(0.5); fplot(f,[10,1000]) ...

11 jours ago | 0

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Answered
Is NaN ok here?
Sure. It does not bother me. Why does it bother you? B = [1.66000000e-01 6.60000000e-02 1.40000000e-02 3.90000000e-02 1.4000000...

11 jours ago | 0

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Answered
Gaussian Quadrature Error Help
I think you misiunderstand Gaussian quadrature. You claim to have 4 points. WRONG. You have TWO points in x, and TWO in y, the...

12 jours ago | 1

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Answered
Tic, Toc Behavior
Using tic and toc to masure any time is a bad idea. Using tic and toc to masure any time is a bad idea. Using tic and toc to m...

12 jours ago | 1

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What does squeeze() do in MATLAB?
Squeeze is a useful tool to help compress dimensions of a multidimensional array when you have performed some operations. Let me...

12 jours ago | 1

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Answered
Solve as Optimization Problem in Matlab
In MATLAB, the solution is intlinprog. Of course, there may be multiple solutions. intlinprog does not give them, if any could e...

13 jours ago | 0

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Matrix multiplication from the right with inverse matrix
a is a 3x2 matrix. No matter what, you cannot compute the inverse of a, so U=R*A^-1 is meaningless. I assume you want to sol...

13 jours ago | 0

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Look-up Table "Newton Interpolation"
Let me suggest this is a bad idea. The result will be an interpolant that is not even differentiable across the data points. A n...

14 jours ago | 0

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radius and height of a cylinder with given volume and cost per m^2
I won't do your homework for you, and I truly hope nobody else does it either, as that would be inappropriate. But it seems if ...

14 jours ago | 1

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Answered
How to do a non linear fit in MATLAB?
Only VERY poorly. Your data is barely sufficient to estimate anything more than a straight line. R=8.314; P=[0.1 0.1 0.1 0.1 ...

14 jours ago | 0

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Fit with exp2 doesn't working
I'll assume you want to fit this using a sum of two exponentials? Since that is the way you plotted it, I assume that is so. ...

14 jours ago | 1

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Curve is not fitting
With only one or two points where the function is not essentially constant to within the noise of the system, a good fit will be...

14 jours ago | 1

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How can i find equilibrium points of 2 ODEs?
You have a system of ODEs. An equilibrium point is where the derivative is zero. So just use solve, applied to the derivatives...

14 jours ago | 0

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Answered
Use or Pi and raising matrix to a Power
MATLAB tells you exactly what is wrong, and how to fix it. (This has nothing to do with your use of pi.) Error using ^ (lin...

14 jours ago | 0

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Inverse linear/nonlinear regression model
You cannot do this. There are infinitely many possible solutions there, as you should recognize.

15 jours ago | 0

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checking input an integer greater than 0?
If you want to check for an integer that exceeds zero, first use the && and || operators. So assuming you want to throw an erro...

15 jours ago | 0

Answered
Between ei(vpa(5)) and vpa (ei(5) ) which command would provide a higher precision for the integral ei(5) ?
Is this a homework assignment? My spidey sense is tingling. However, a quick glance at your other questions suggests you are hop...

15 jours ago | 0

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Answered
solve two equations with 2 unknowns(pbar,rho)
The symbolic toolbox does not always work well with the stats toolbox. And stats is where normcdf and norminv come from. So do...

15 jours ago | 0

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