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J. Alex Lee


Last seen: 14 days ago |  Active since 2016

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Answered
plot every column in an excel sheet and the corresponding column in the second sheet in same box plot with header name as chart title.
T1 = readtable("example.xlsx","Sheet","TF off TS","NumHeaderLines",1); T2 = readtable("example.xlsx","Sheet","No twist free off...

26 days ago | 0

Answered
Markers on UIAxes in App Designer
you probably need to issue plot commands specifying "parent" as the app.UIAxes

26 days ago | 0

Answered
Solution of Fick's Second Law of Diffusion Equation
I agree with the general idea in Torsten's answer using FD and method of lines. Specifically what ode solver to use on the discr...

27 days ago | 1

Answered
Detect when UIfigure is open
the best i have been able to do is to not use appdesigner itself to create ui components and start the app very bare bones so th...

30 days ago | 0

Answered
Plot Stiffness of Unidirectional Composite in Polar Coordinate System
theta and rho are respectively angle and radius...so for example t = linspace(0,2*pi,500)'; r = cos(t).^4 + .5; polarplot(t,r...

1 month ago | 0

| accepted

Answered
Slower program due to an additional figure window
I think your issue is that call to getframe() needs app.UIAxes to be supplied, that is, getframe(app.UIAxes) otherwise it wil...

1 month ago | 0

Answered
Filled contour with whiteout regions based on xyz data
If you can tolerate manually identifying white-out regions (just by a single set of coordinates somewhere in the region, such as...

1 month ago | 1

Answered
Curvature of a 2D image
The calculation of arc length and curvature using arc length parameterization and its derivatives, given "perfect coordinates", ...

2 months ago | 0

| accepted

Answered
How to group statistics by 2 variables for plotting?
are you looking for something like this? load("VolcRegion_clust.mat") T = cell2table(VolcType_clust,"VariableNames",["Region...

3 months ago | 1

| accepted

Answered
Increasing speed by fixing axis and grid outside of a loop
I think what Torsten is getting after is: do you intend to keep the history of all the previous pairs you plotted? But I'm goin...

3 months ago | 0

| accepted

Answered
morphing a surface over 3D data
It's hard to give specific ideas without knowing the shape, but... "The final goal is to obtain a triangulated surface that con...

3 months ago | 0

Answered
how to remove jumps?
Are you looking at the diff() of the signals? Maybe you can find the locations of the jumps as where the largest absolute value ...

3 months ago | 0

| accepted

Answered
How to draw a ball by plot3?
like this? but it doesn't use plot3 [x,y,z] = sphere(64); p = surf(x,y,z,"FaceColor","interp","EdgeColor","none"); p.CData = ...

3 months ago | 0

Answered
条件ごとに計算させるにはどうすればよいか
Gomen, kana tukaemasen. mask ni kanshiteha "logical indexing" wo search shitemitekudasai: link @(x)fun ni kanshiteha "anonymou...

3 months ago | 2

Answered
条件ごとに計算させるにはどうすればよいか
Do you know about the function "atan2", which might be helpful M1 = readmatrix("tmp.txt"); tc = 1/1000000; % no need to...

3 months ago | 2

| accepted

Answered
Using readtable (or similar) to import multiple ranges of data
it's hard to say without seeing the csv file, but it sounds like the data is not really tabular, and you may be better off using...

3 months ago | 0

Answered
I want to store tables in a for loop to excel
Assuming the columns in the table are always the same, and you generate multiple versions of a table in the loop, and want to sa...

4 months ago | 0

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Answered
How to combine group of plots into one with separate marker
Assuming that each figure only has 1 axes and you want the first axes to be the one you want to copy into fig(1) = open('f1.fig...

4 months ago | 0

Answered
enable/disable menu next to radiobuttons when those are selected/deselected
You are hiding how you created the radio buttons in the gui creation, but a big question is whether when you say "2 button group...

4 months ago | 0

| accepted

Answered
How to select rows in a table containing both string and numbers?
Look up how to index tables, and ismember. % your table name: modal_displacements % extract the columns of interest, if you ...

4 months ago | 1

| accepted

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...

4 months 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...

4 months 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...

4 months 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...

4 months 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...

4 months 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...

4 months 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>> ...

4 months 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>> ...

4 months 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...

4 months 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...

4 months ago | 0

| accepted

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