Community Profile # J. Alex Lee

Last seen: Today 2016 以来アクティブ

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

38分 前

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 ...

39分 前

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

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 ...

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

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

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

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

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

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...

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 ...

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...

4日 前 | 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...

16日 前 | 0

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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...

17日 前 | 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ヶ月 前 | 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ヶ月 前 | 0

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ヶ月 前 | 1 件の回答 | 0

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For 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ヶ月 前 | 0

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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ヶ月 前 | 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ヶ月 前 | 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...

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 ...

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...

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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...

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...

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...

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...

Remove zoom from axes
This should be a good entrypoint: https://www.mathworks.com/help/matlab/ref/disabledefaultinteractivity.html https://www.mathw...

Can I pass arguments to a @callbackFcn?
configureCallback(s,"terminator",@(src,evnt)readSerialData(src,evnt,operation mode)) So the first parentheses specify the inter...

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I am trying to find the exact distance of a curvy line.
Assuming that the boundary points are ordered well (adjacently), then you can calculate the cummulative square distance between ...