# J. Alex Lee

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**Content Feed**

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...

ongeveer 16 uur 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...

ongeveer 17 uur ago

Shift a curve in logarithmic scale

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

ongeveer 17 uur 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.

1 dag 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 ...

1 dag 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 ...

2 dagen ago

Solved

Whether the input is vector?

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

2 dagen ago

Solved

Get the length of a given vector

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

2 dagen 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...

2 dagen 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 ...

2 dagen ago

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...

6 dagen ago | 1

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...

18 dagen ago | 0

| accepted

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...

18 dagen ago | 0

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 maanden ago | 1

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 maanden 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 maanden ago | 1 answer | 0

### 1

answerFor loop to carry value down depending on another matrix value

In your example, there is a "delay" by 1 row when your switch from 0 to -1 occurs, so the following answer is not exactly produc...

7 maanden ago | 0

| accepted

There used to be a function RefineMesh in Matlab used in solving ODE's, but it is now used for PDE's and isn't the same function. Is there a new function for the old purpose?

The workflow above only re-evaluates the "static" solution of ode45 at more data points by an interpolation scheme consistent wi...

10 maanden ago | 0

Is there a way to measure interletter spacing for Fixed Width font in MATLAB?

I have no idea what you mean by "visual angle per font size", but I know of one way: lbl = uicontrol("Style","text","String","...

11 maanden ago | 0

Functional programming construct to expand cell array into arguments for other functions without using an intermediate variable in the (user) code?

I am still not sure why you can't just have your generalized comparator function saved as a function somewhere on your path so y...

ongeveer een jaar ago | 1

How to integrate uidatepicker command with GUI interface?

Details are thin here...but it sounds like you need to first specify the parent graphics object that you want your uidatepicker ...

ongeveer een jaar ago | 0

How to solve exponential equation to find unknown constants

data = readtable("Book1.xlsx"); Alternatively, based on my reparameterization above you can as a first pass say everything afte...

ongeveer een jaar ago | 0

| accepted

How to solve exponential equation to find unknown constants

Do you have an intuition of what the graph of looks like? Hint: it looks like your plot, scaled and shifted roughly only in the...

ongeveer een jaar ago | 0

Print vectorized graphic of patches without edges

I now believe it is because you are technically plotting 3D patches (telling Matlab there's a z-coordinate, even if they are all...

ongeveer een jaar ago | 1

Calculations of Angle between two points

If you have the list of 3D coordinates rng(1) % control random generator NPoints = 5 vertices = rand(NPoints,3) You can defi...

ongeveer een jaar ago | 0

How to symbolically integrate f(T) = exp (E/(8.314*T) through integration by parts or with trapezoidal method?

The application still is unclear to me... If you just want numerical integration, look at the function "integral", as implement...

ongeveer een jaar ago | 0