Answered
Matrix 'if' statement
One thing that new users of MATLAB mistake, is they want an if statement to apply to every element of a matrix or vector. For e...

5 years ago | 4

Answered
Plot with varying variable in optimization
You want to vary q, and for every value of q, get a corresponding value for K? w=2; y=10 q=0.5:1.5 % here q is the varing var...

5 years ago | 0

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Answered
Non-linear system of inequalities
Start with, what can we do in symbolic form? syms S G real Eq(1) = G > 21; Eq(2) = S >= 15; Eq(3) = S <= 18; Eq(4) = 61 <...

5 years ago | 2

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Answered
How do I find If one polygon is inside another?
There is a simple solution. It involves two tests, both of which are essentially vectorized. In fact, now that I think of it, th...

5 years ago | 0

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How to display the nth term where the nth term is found by adding x number previous term?
Admit it. This is homework, since nobody would ask you to do this if it were not. And since it is homework, NOBODY should write ...

5 years ago | 0

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Integrating discrete values to determine the absolute value of displacement
Find any consecutive pair of points that change the sign of their velocity. Between such a pair, use (linear) interpolation to ...

5 years ago | 1

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Answered
I want to loop an equation over multiple rows
Your problem is you want to write this as if you are still using Excel. MATLAB is not a spreadsheet, but you are still thinking ...

5 years ago | 0

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Answered
Intersection of Parametric Curves Using vpasolve
Your probem is when you zoomed in. The mathematics seems fine. >> tn tn = 11.4745470305524 >> un un = ...

5 years ago | 1

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Answered
how can I solve this double integral?
Why does this look like homework? Why do you assume it has a finite solution? The integral over y is trivial. syms y phi K =...

5 years ago | 0

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Answered
How can I speed up vpasolve?
Seriously, it has no solution? Gosh, am I surprised. So what does this do? syms z thetaz a = 1; b = 2; theta0 = 0; eqn = (a...

5 years ago | 0

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Answered
What does a=[b(90:end) b(1:89)] represent ?
You very clearly need to spend some time with a MATLAB manual or tutorial. You are asking a basic question, that would be covere...

5 years ago | 0

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Fit a transform to remove piecewise discontinuities
Honestly, I don't see the problem, at least if the discontinuity is as large as you show it. That will make it clear where the b...

5 years ago | 1

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How to symbolically integrate f(T) = exp (E/(8.314*T) through integration by parts or with trapezoidal method?
It is simply not true that there is no UNIQUE solution. There is no EXACT, analytical solution that can be written in a simple a...

5 years ago | 0

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Answered
Is there anyway to Re-grid one dataset to another dataset resolution without interpolating??
What you are asking to do is arguably still "interpolation" of a sort. In fact, Walter''s use of nearest neighbor is quite reaso...

5 years ago | 0

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cross multiplication of algebra expression denominators
syms x y a b k eq = y/a == k+x/b Symple enough. :) eq = expand(eq*a*b)

5 years ago | 0

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Answered
Optimal values dynamic programming and mathematical programming
The crystal ball is very foggy today. What does it matter what we think? We know nothing about what you actually did, if the cod...

5 years ago | 1

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correlation of nonlinear variables
Correlation does not really make sense in respect to nonlinear variables. Depending on the values of the variables, they will be...

5 years ago | 2

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Why does N-D convexhulln give a matrix as an output instead of vector containing indices of inputs?
The convex hull of a 2-d data set will be simply a polygon. So the convex hull code returns the set of points in the polygon, in...

5 years ago | 0

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Answered
Modification in besselk (Modified Bessel fn of 2nd kind order zero)
Simple answer - No. Utilities like this, erf is another excellent example, that while they can be defined in terms of an integr...

5 years ago | 0

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Answered
I am trying to solve for w using determinants
Why do you think there is a problem. We can shorten the coefficients of Z a bit, just to look at what is happening. vpa(Z,3) a...

5 years ago | 0

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Is there a way to get the same results for linprog & fmincon given the same optimization problem?
Well, NO. You cannot insure exactly the same solution will arise from both solvers. I can think of several ways for the two solv...

5 years ago | 1

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Answered
Does anyone know how to add the legend?
x = rand(1,5); y1 = x + 2; y2 = x*2; plot(x,y1,'ro') hold on plot(x,y2,'bs') legend('+2','*2') Really, pretty basic. In...

5 years ago | 0

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what is the difference between assigning with and without range?
Yes. There is a difference, and a fundamental one. In the first case, the assignment a=b COMPLETELY replaces a. The variable is ...

5 years ago | 1

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Help solving a nonlinear function
I don't know what it means when you call something an equation that varies in a loop. This is certainly not a PHD level rabbit h...

5 years ago | 0

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Solving for different thetas in an equation.
You CANNOT solve for both theta1 and theta2 in a single equation like that. (I assume you meant a single equation, because you h...

5 years ago | 0

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How does this code support in carparking slot identification?
Out of context, this code is meaningless. It has absolutely nothing to do with the question you have asked about. And that was e...

5 years ago | 0

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Project Euler: Problem 11
As far as why it failed test case #3, perhaps you need to write better, more efficient code. The code you wrote will be a bit of...

5 years ago | 0

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Answered
Integrate Acceleration to velocity, wrong plot
I would suggest your problem may be a simple one. When you integrate a function, there is a constant of integration, which is ...

5 years ago | 0

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skewness and kurtosis of a weighted distribution
Sorry for being late to the party, but I had to answer this question once I saw an answer posted that does not actually help. T...

5 years ago | 2

Answered
WHAT IS THE SOLUTION FOR
Why? Is there a problem? Are you worried that your code is taking 1 millisecond longer to execute in this case? My point is, th...

5 years ago | 1

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