Answered
processing experimental data with polyfit
You asked for feedback... So what does your tool offer that is innovative that someone might gain some benefit from? It reads...

6 years ago | 1

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Answered
how I will check the Conditional statement task?
The obvious way is to use a switch construct. for i = 1:100 switch mod(i,5) case 0 case 1 case 2 c...

6 years ago | 1

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Variable precision arithmetic in ode45 and others?
Short answer - no. Long answer - nnnnoooooo. ODE45 uses only singles or doubles. Nothing symbolic. vpa is a symbolic tool.

6 years ago | 0

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Solving a nonlinear equation numerically
It looks as if you don't need to solve it numerically. syms x(t) xpp = diff(x,t,2) syms k dsolve(xpp + k*sin(x) == 0) dsolv...

6 years ago | 0

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how can i aproximate /modify long numbers
It looks like you really need to understand floating point numbers. a=abs(2.6599-2.65987) It looks like 3e-5. But is it? Chan...

6 years ago | 2

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Answered
How Do I get an Invoice for my purchase?
Answers is not customer support. It is a user supported group, entirely voluntary. We have no access to anything concerning an i...

6 years ago | 0

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exhaustive search algorithm Consept
The method you are using is comonly called a multi-start method. It is generally NOT an exhaustive search, although that depends...

6 years ago | 0

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2010 won't activate
The odds are good that your new computer will not run that old a release. 2010 is pretty old as things go. Check the system requ...

6 years ago | 0

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How to work with a matrix close to singular in MATLAB ?
Sorry, but no magic exists. This is why numerical linear algebra exists as an area of mathematics, and why courses are taught in...

6 years ago | 0

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Answered
How to solve 3 functions in 4 variables
What you show is NOT the answer. It is AN answer. 3 equations with 4 variables is called an underdetermined problem. There is ...

6 years ago | 0

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Error solving three equations in three unknowns
syms a b c Tan = -b - 2 == 0; Man = c + 1 == 0; Lan = a + b - 3*c - 1 == 0; [av,bv,cv] = solve(Tan,Man,Lan,a,b,c) This is a...

6 years ago | 0

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Numerical Approximation of Fisher Information Matrix
You cannot perform numerical differentiation? At the very least, you can use tools for numerical differentiation from my derives...

6 years ago | 0

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Finding an analytical fit for a multi-dimensional function
Read again what Walter has said. There is much to learn for you. You might also look at some of what is found in this post, whi...

6 years ago | 0

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optimization with multivariable and constraint
Sorry, but this seems just plain silly. You are way overthinking things. The new point P3 lies at the midpoint of the straight ...

6 years ago | 0

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How to create a 6 dimension array in Matlab and store values in it
It very much depends on what you want to do with that data. But I think you are looking for a very inefficient way to store your...

6 years ago | 0

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How to write the codes for this gamma function?
Easy, peasy. Although since you are using gamma as a FUNCTION, it is a REALLY bad idea to use beta, another closely related spec...

6 years ago | 0

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identify lowercase letters, uppercase letters, numbers and spaces
help ismember

6 years ago | 0

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Recursive function to reverse a vector
Hmm. Suppose you strip off the last digit of the vector on each pass? Can you do that? You already know how to find the last ele...

6 years ago | 0

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Answered
I want to make a recursive function that sums all the digits in a number
The "last" digit? A little ambiguously stated. In the number 12345, is 5 the last digit you are asking about? It looks like you...

6 years ago | 0

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Answered
How can I interpolate a screw surface?
Is this a single valued function of x and y? Or x and z, y and z? No. Is this a function over some contiguous convex region in ...

6 years ago | 0

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Help with syms function. Unable to find explicit solution
Would you assume that every equation you write down hs an analytical solution? Why would you? T = 10; h = 20; g = -9.81; ...

6 years ago | 0

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Answered
how to separate variables of f(x,y)?
In a completely general sense, if you do not know IF the functions can be separated, then no it is probably impossible to do for...

6 years ago | 1

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nonlinear equality constraint with symbolic variables
Numerical optimizers CANNOT use symbolic variables. That is, this is meaningless when using a tool like fmincon. syms t [1 16...

6 years ago | 0

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linear regression in log-log scale
Sadly, while I wish the fitting tool would fit your data on log scales if that is how the axes are set, it does not. (That has a...

6 years ago | 0

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Why multi objctive GA doesn't give identical answers?
First, many optimization problems have multiple solutions. Nonlinear problems often do. Second, there is no assurance that any ...

6 years ago | 1

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Answered
New to Matlab - need help with rearranging equation
There was NO error returned. It was a WARNING, that while you want to find a solution, none could be found. There are many thing...

6 years ago | 1

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solve Equilibrium Position of Mass - Spring - Damped System
As Alan pointed out, you probably wanted to take the 2nd derivative of x there in your system, not the 20th derivative. The term...

6 years ago | 0

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How do I express coefficient x, y, z using a, b, c, P0?
You can want to do anything you want. But unless you have a magic wand, that often fails. Here, you have ONE equation (3) that...

6 years ago | 1

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Answered
How to solve Ax=B with some knowns in x and B
This is a moderately complex question, because I'm not sure you fully appreciate the problem, and I am also sure this is not you...

6 years ago | 0

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Row of a Pascal's Triangle using recursion
Simplest is to use conv. In terms of your code, I have no idea what you think the line PascalRow(1) = 1; does, but it does not...

6 years ago | 0