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How to extrapolate the first 5 points
load points.mat x = points(:,1); y = points(:,2); i1 = 1:5; i2 = 6:336; plot(x(i1),y(i1),'ro',x(i2),y(i2),'g.') I have no ...

2年以上前 | 0

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What is the mechanism or math behind the function islocalmax(A)?
Someone who is not an employee of TMW cannot see the code. (I can't, as I am not an employee.) And if someone is an employee, th...

2年以上前 | 1

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how to find data points of function passed through a distorted "pipe"?
A difficult question to answer, since so much is left to guess. And the vaguesness of your question suggests all you want is a r...

2年以上前 | 0

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How can we solve an equation if it has infinite number of solutions?
Can you ALWAYS find all solutions to a problem in some interval? NO. Sometimes, the use of returnconditions will help, since it ...

2年以上前 | 0

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Converting from symbolic to numerical data
Do you understand that sin and cos assume RADIANS, NOT degrees? But you are substituting in angles that are clearly in terms of ...

2年以上前 | 1

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How can I make a vector that looks like this [2 1 2 1 1 4 1 1 6 1 1 8...1 100 1]?
If I had to guess, you might want to do this: V = ones(1,151); V(1) = 2; V(3:3:end) = 2:2:100; V The last few elements of...

2年以上前 | 1

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MATLAB, draw tolerances in a plot similar to errorbar in matlab, but perpendicular to points in the curve.
You can want code to do as you want, but it won't help. And there is no version of errorbar that will do as you want. This means...

2年以上前 | 0

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New to matlab, trying to understand basic functions still
If you are this new to MATLAB, then you seriously need to spend some tie reading the tutorials available. The MATLAB Onramp is ...

2年以上前 | 0

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ITERATIVE SOLUTION OF ONE UNKNOWN VALUE IN AN EQUATION
Hint: try solving for t. syms x y t tsol = solve(x == cos(t) - y*sin(t),t) So there are two solutions. Much of the time, a f...

2年以上前 | 0

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Unable to find explicit solution
It is not just that MATLAB could not solve it. In fact, it is trivially easy to write down equations where there is no algebraic...

2年以上前 | 0

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Using biterr with negative numbers
Did I not just answer how to solve essentially the same problem, but in the other direction? Read my answer to your last questio...

2年以上前 | 0

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Do you know how to convert existing graph into coding. I don't have the equations. I have the graph picture in my textbook but i need it to include in my matlab apps
I'm sorry. There is no magic way to know the formula of a given graph in a textbook. And no magic way to just turn that graph in...

2年以上前 | 1

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How do I generate a random number vector composed of just 1 and -1
The trick is always to start with something you can do, and see if there is a way to modify it so it will work. For example, yo...

2年以上前 | 1

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I am a university student and this is my university email: redacted@eng.zu.edu.eg Can I get Matlab for free? If possible, how do I get the activation key?
I assume you are a student in Egypt, given the address. MATLAB is not offered for free. However, you need to contact your unive...

2年以上前 | 0

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Solve these equations to get x and y in normal number
USE DOUBLE. You already saw that in the answer to your last question. syms x y equ1 = 2760*sind(200)+x*sind(107.5)+y*sind(307....

2年以上前 | 0

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How to deal with the Hermitian matrix that is meant to be positive semidefinite but turned out to have negative eigenvalue due to numerical issues?
This is not a question of a precision you can set. You can download my nearestSPD function from the file exchange. It finds the...

2年以上前 | 1

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i was calculate using gauss jacobi method with 4x4 matrice, why does NaN appear? what should i do?
You write a function that allows you to pass in A and B, but then you define A anb B in the function? Sigh. I think you do not u...

2年以上前 | 0

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Graphing changing constants using for loops
Why do you think it is not? Ok, there are multiple problems in your code. First, maybe I should ask what you think this line do...

2年以上前 | 0

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Best practice: should a function return a row vector or a column vector
Let me disagree with a basic assumption of your question, in that there must be some best practice at all on this. Instead, I'll...

2年以上前 | 2

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I don't understand why this script is outputting imaginary values
Hint: the log of a negative number is imaginary. Hint: The sqrt of a negative number is imaginary. Do you take logs in there?...

2年以上前 | 1

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I need help figuring out the mistake in my function approximation
Avoid the use of the normal equations as you used, i.e., this crapola that you called the least squares method. Backslash is jus...

2年以上前 | 0

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quadratic curvature doesn't went smoothly
load steam % Fit a first degree polynomial to the data. [p s]= polyfit(x,y,2); y1=polyval(p,x); % PLOTTING DATA plot(x,y,'o...

2年以上前 | 0

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surf for n-dimensional cartesian matrix
You cannot do so. That makes no sense at all, sorry. You actually have a FOUR dimensional problem, thus W(x,y,z). This is beca...

2年以上前 | 0

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problem with symbolic factorization with two symbols
That you want to see a simple set of factors is not relevant. You essentially need to obtain the roots of this cubic polynomial ...

2年以上前 | 1

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fmincon: optimize till nonlinear condition is false
It does not just skip" the interval. It probably never saw it. An optimizer does not plot your function. It has no clue what it ...

2年以上前 | 1

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Save text of script in .mat file?
Is it really a common problem? Not that I've ever seen any need for in 35 years of MATLAB use, nor in any question I can recall ...

2年以上前 | 0

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The function ''vpasolve'' cannot find a solution with specified range even if its option 'random' was set to true, however the specified range does include 1 solution.
d1=-8;d2=-1;d3=6; t1=2.2187;t2=1.2392;t3=1.4223; v=6.038;a1=v*t1/2;a2=v*t2/2;a3=v*t3/2; c1=d1/2;c2=d2/2;c3=d3/2; b1=sqrt(a1^...

2年以上前 | 1

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Printing a calculated function.
You CANNOT. At least, given only the vector of values, there are infinitely many possible functions that may have generated them...

2年以上前 | 0

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Finding Solution to Inequality in Matlab
Simple enough. I'll just work with eqn6 here. syms tau beta lambda theta Solx eqn6 = (1-tau)*(1-theta)/((1-beta)*(1-lambda))> ...

2年以上前 | 0

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How to create loop for gaussian quadrature
What has any of this to do with a loop anyway? There are no loops seen. You have hard coded what appear to be some basic Gauss-L...

2年以上前 | 0