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Thales


60 total contributions since 2014

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Answered
Multiple summations in one formula
You can use for loops to do the sum or use the sum function: clc; clear; close all force; M = 1; % Test day N = 14; % Numbe...

1 month ago | 1

| accepted

Question


LiveScript error while saving to html
I have a LiveScript code with a lot of symbolic expressions. I try to export the LiveScript to html, but I get the following err...

3 months ago | 0 answers | 0

0

answers

Question


2D Simpsons Composite integration
In the Mathematics Stack Exchange I questioned about the extension of the composite Simpsons rule to 2D integration. The proble...

4 months ago | 0 answers | 0

0

answers

Question


sine fit in matlab vs closed-form expressions (linear least squares)
Given the arrays: t = 0:0.25:2; y = [3.0800 3.4900 3.1500 2.2300 1.2300 0.6900 0.8900 1.7300 2.7600]...

5 months ago | 1 answer | 0

1

answer

Question


Save/use intermediate values on ode solver
I am doing a time integration of a system of ODEs using a stiff solver (ode15s). It is working, but I want to speed things up. ...

6 months ago | 0 answers | 0

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answers

Question


Volume defined by vertices to stl file to mesh
Hi, I have the following points defining a hexahedra in space. x = [0 0 0 0 0.1 0.1 0.1 0.1]'; y = [0 0.1 0 0.1 0 0.1 0 0.1]'...

8 months ago | 2 answers | 0

2

answers

Question


plot mean of vector v(1:i)
For simplicity, I have the following code v=1:10; for i=1:10 mean_v(i) = mean(v(1:i)); end plot(v,mean_v) In essen...

10 months ago | 1 answer | 0

1

answer

Question


Publish pdf with code error
I have a mlx file with some text and a few lines of code. I deliberately wrote a few code instructions I expect to return an err...

1 year ago | 0 answers | 0

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answers

Question


Change exponent of scientific notation on plot
How do I change the scientific notation exponent on the x-axis of my plot? <</matlabcentral/answers/uploaded_files/103633/que...

1 year ago | 1 answer | 1

1

answer

Question


Parallelize instructions inside for
Is there a way to parallelize independent instructions within a for loop? The loops themselves aren't independent, so parfor is...

2 years ago | 1 answer | 0

1

answer

Question


summing two 3d matrices to check convergence
Given two 3d matrices, obtained in a iterative process as the solution to a PDE, I want to check convergence. To do so, I check:...

2 years ago | 1 answer | 0

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answer

Answered
Can I solve a set of differential equations containing multiple dependent variable and their derivatives ?. There is only one independent variable in my set of equations.
check the ode15i, suitable for implicit equations, like the one you provided. <https://www.mathworks.com/help/matlab/ref/ode1...

2 years ago | 0

| accepted

Question


matlab autocorrect in editor preferences
Is there an AutoCorrect in Matlab Editor as there is one for Word? I would like to type a few letters and change it for some com...

2 years ago | 0 answers | 0

0

answers

Solved


Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

2 years ago

Solved


Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

2 years ago

Solved


Bullseye Matrix
Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

2 years ago

Question


what is a good way to mesh the desired domain
Given the mesh below (I can find the mesh and I plotted over the mesh two vertical lines), I would like to know a good way to fi...

2 years ago | 0 answers | 0

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answers

Solved


Target sorting
Sort the given list of numbers |a| according to how far away each element is from the target value |t|. The result should return...

2 years ago

Solved


How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

2 years ago

Solved


The Goldbach Conjecture
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

2 years ago

Solved


Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

2 years ago

Solved


The Hitchhiker's Guide to MATLAB
Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

2 years ago

Solved


Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

2 years ago

Solved


Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

2 years ago

Solved


Sort a list of complex numbers based on far they are from the origin.
Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...

2 years ago

Solved


Simple equation: Annual salary
Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...

2 years ago

Solved


Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

2 years ago

Solved


Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

2 years ago

Solved


Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

2 years ago

Solved


Return the 3n+1 sequence for n
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

2 years ago

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