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J. Alex Lee


Last seen: Today Active since 2016

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Solved


Is this triangle right-angled?
Given three positive numbers a, b, c, where c is the largest number, return *true* if the triangle with sides a, b and c is righ...

9 hours ago

Solved


Find a Pythagorean triple
Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them com...

9 hours ago

Solved


Is this triangle right-angled?
Given any three positive numbers a, b, c, return true if the triangle with sides a, b and c is right-angled. Otherwise, return f...

9 hours ago

Solved


Triangle sequence
A sequence of triangles is constructed in the following way: 1) the first triangle is Pythagoras' 3-4-5 triangle 2) the s...

9 hours ago

Solved


Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<https://i.imgu...

9 hours ago

Solved


Area of an equilateral triangle
Calculate the area of an equilateral triangle of side x. <<https://i.imgur.com/jlZDHhq.png>> Image courtesy of <http://up...

9 hours ago

Solved


Side of an equilateral triangle
If an equilateral triangle has area A, then what is the length of each of its sides, x? <<https://i.imgur.com/jlZDHhq.png>> ...

9 hours ago

Solved


Side of a rhombus
If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<https://imgur.com/x6hT6mm.png>> ...

10 hours ago

Answered
Undefined function 'isnan' for input arguments of type 'Nodes2'
For reference, a related question that shows more of the actual classes in question: https://www.mathworks.com/matlabcentral/ans...

1 day ago | 1

Answered
appdesigner, choosing from dropdown different functions
I suspect your problem is that your conditional is flawed. To test, put in an "else" to check if your conditional is not being m...

1 day ago | 0

Solved


Area of an Isoceles Triangle
An isosceles triangle has equal sides of length x and a base of length y. Find the area, A, of the triangle. <<https://imgur...

4 days ago

Solved


Dimensions of a rectangle
The longer side of a rectangle is three times the length of the shorter side. If the length of the diagonal is x, find the width...

4 days ago

Answered
Shift a curve in logarithmic scale
shifting in log scale is actually a multiplication, not an addition - is that what you need?

4 days ago | 0

| accepted

Solved


Vector creation
Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

5 days ago

Solved


Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

5 days ago

Solved


Create a vector
Create a vector from 0 to n by intervals of 2.

5 days ago

Solved


Flip the vector from right to left
Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

5 days ago

Solved


Whether the input is vector?
Given the input x, return 1 if x is vector or else 0.

5 days ago

Solved


Find max
Find the maximum value of a given vector or matrix.

5 days ago

Solved


Get the length of a given vector
Given a vector x, the output y should equal the length of x.

5 days ago

Solved


Inner product of two vectors
Find the inner product of two vectors.

5 days ago

Solved


Arrange Vector in descending order
If x=[0,3,4,2,1] then y=[4,3,2,1,0]

5 days ago

Solved


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...

5 days ago

Solved


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 ...

5 days ago

Answered
How to trasform from cell to matrix and transpose from horizontal to vertical at the same time?
Just change your cat dimension to 1, then transpose later. Data.my_cell = {rand(1,101);rand(1,101);rand(1,101)} m = cat(1,Data...

9 days ago | 1

Answered
Can I change my UIFigure size while maintaining location of elements in figure?
I think you may be able to achieve what you want using the uigridlayout, see if this example works on 2019b (I'm on 2022a). The...

20 days ago | 0

| accepted

Answered
Heatmap is too Thin in Figure
imshow() asserts 1:1 aspect ratio to show the image, so you can manually change the axes Position property after setting DataAsp...

21 days ago | 0

Answered
Implementing Crank Nicholson in spherical setting
I believe this should be the right formulation for CN (taking a few liberties interpreting your problem). If you want speed, pr...

6 months ago | 1

Answered
Implementing Crank Nicholson in spherical setting
For one thing, your boundary conditions (as developed on your pdf) don't look right. At r=0, you can just directly use Eq 8 LHS...

6 months ago | 0

Question


Built in look-up style interpolation of timetables for non-numeric data?
Is there no built-in function similar to interp1 for numeric data, that can operate on timetables with arbitrary data types? So...

7 months ago | 1 answer | 0

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