# J. Alex Lee

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**Content Feed**

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...

1 month ago | 1

| accepted

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...

1 month ago | 0

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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...

1 month ago | 0

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 ...

1 month ago | 0

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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 = ...

1 month ago | 0

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...

1 month ago | 2

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...

1 month ago | 2

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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...

2 months ago | 0

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...

2 months ago | 0

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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...

2 months ago | 0

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...

2 months ago | 0

| accepted

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 ...

2 months ago | 1

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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...

2 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...

2 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...

2 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...

2 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...

2 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...

2 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>> ...

2 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>> ...

2 months ago

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...

2 months ago | 1

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...

2 months ago | 0

| accepted

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...

2 months 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...

2 months ago

Shift a curve in logarithmic scale

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

2 months ago | 0

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Solved

Vector creation

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

2 months 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 ...

2 months 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 months ago

Solved

Whether the input is vector?

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

2 months ago