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# UNK

Last seen: 11 months ago Active since 2016

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better than if else conditions
I would like to give a tag to a number based on in which region it lies. I am currently using an if else condition. Wondering if...

4 years ago | 2 answers | 0

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Question

How to find mutual arrays position of multiple matrices with different length
I have two matrices and I want the corresponding all indices, not just the first one. Here is the example A = ... ...

4 years ago | 2 answers | 0

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Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

4 years ago

Solved

Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

4 years ago

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

4 years ago

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Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

4 years ago

Solved

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

4 years ago

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Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

4 years ago

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Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

4 years ago

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Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

4 years ago

Solved

Is my wife right?
Regardless of input, output the string 'yes'.

4 years ago

Solved

Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

4 years ago

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Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

4 years ago

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

4 years ago

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Given a and b, return the sum a+b in c.

4 years ago

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Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

4 years ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

4 years ago

Solving an integral differential equation using BVP4C
integral(x1,t,tend) = x5 x5dot = -x1 % using fundamental theorem of calculus This solves the problem. http://math.st...

5 years ago | 0

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Question

Solving an integral differential equation using BVP4C
I have a set of differential equations of the form: x1dot = x3; x2dot = x2; x3dot = x1; x4dot = x2...

5 years ago | 1 answer | 0

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Fsolve convergence when the variables are changing of the order of 1e-3 or less
I am interested in using fsolve to get the initial guess which satisfies a boundary condition in a Boundary Value Problem(BVP). ...

5 years ago | 1 answer | 0

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Question

Estimate the rotation of central axis of a 3D curve
I have N points in [x,y,z] and this kind of takes a spiral shape. Is it possible to find the central axis of such a spiral. Thi...

6 years ago | 0 answers | 0

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Question

Boundary value problem in optimization formulation
I have to solve an optimization problem and it has a boundary value problem(BVP) in it. As we know the BVP takes quite a bit of ...

6 years ago | 1 answer | 0

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Why does parpool take so long to start up for the first time in a MATLAB session?
You can refer the answer for a similar question asked in stack exchange. <http://stackoverflow.com/questions/17125785/matlabpoo...

6 years ago | 0

doubt to store a array values in for loop ?
Hi Ravi, If you have a row vector as a = 1:1:10 and you want only some entries as a new vector you can do b = a([1:3:10]) ...

6 years ago | 2

Question

Convergence program stuck at a point.
Hi all, Below is the code when I am trying to get convergence of a function by varying a variable which dictates it. The sum ...

6 years ago | 1 answer | 0

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Question

Warning message while using camera calibrator
I am trying to calibrate a camera using Matlab Camera Calibrator. After I select the images, I am getting the following warning ...

6 years ago | 1 answer | 1

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Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

6 years ago

Question

surface area of a 3D surface
I have data for 3D points and I have made a surface using these points. Is there a way to get surface area of this 3D surface. ...

6 years ago | 1 answer | 0