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ME


419 total contributions since 2016

Working in mathematical biology.

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Answered
Adding RAM would it speed up the computations done by Matlab?
Increasing your RAM will only really be beneficial for operations on large matrices. If you are struggling with the speed of a s...

9 hours ago | 0

| accepted

Answered
Find element index of one array which is equal to the values from another array
A = [1,1,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,4]; B = [1,1,1,1,1,1,3,3,3,3]; u=unique(B); C=[]; for i=1:numel(u) C=[C find(A...

10 hours ago | 1

| accepted

Answered
What timestep does my ode15s solver use?
Assuming you call ode15s with [t,y]=ode15s... then you can just use diff(t) which will show you the difference between each of...

1 day ago | 0

Answered
Solving a cubic function to get one numeric result?
You aren't going to solve this properly by getting an output of one numerical solution because a cubic equation does actually ha...

3 days ago | 0

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.

4 days ago

Answered
How can I change the title of variables ?
Output=yhat; Unemployment=URhat; Consumption=chat; wage=what; You can always also use: clear vars yhat URhat chat what if ...

7 days ago | 0

Solved


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

7 days ago

Solved


Sums with Excluded Digits
Add all the integers from 1 to n in which the digit m does not appear. m will always be a single digit integer from 0 to 9. no...

7 days ago

Answered
overly convoluted elseif condition
function y=gain(x) for jj=1:4 p(jj)=1-jj/128; end if x<=4 y=p(x); else y=1; end end I have assum...

7 days ago | 0

Answered
Can I run the same Simulink model in different Matlab sessions at the same time? Or would they get mixed up?
I can't specifically answer for Simulink because I've never used it but standard Matlab scripts would be fine with this. I imagi...

7 days ago | 0

Answered
I have an array for y-values and one for x-values, the x-values don't stat from 0, How to plot this?
Assuming that you want these x values to be the ones displayed on the x-axis then it's as simple as: plot(x,y)

7 days ago | 0

| accepted

Answered
Making my function run for multiple input values
You could call the function inside a ‘for’ loop. That would enable you to feed in the different input values. For example: ...

8 days ago | 1

Answered
Count how many numbers are above -1 in matrix
To find the locations of your values you can use idx = find(x>-1); And to get the values you can use val = x(idx);

8 days ago | 0

Solved


Encode Roman Numerals
Create a function taking a non-negative integer as its parameter and returning a string containing the Roman Numeral representat...

8 days ago

Solved


Duplicates
Write a function that accepts a cell array of strings and returns another cell array of strings *with only the duplicates* retai...

8 days 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 ...

8 days ago

Solved


Counting Sequence
Given a vector x, find the "counting sequence" y. A counting sequence is formed by "counting" the entries in a given sequence...

9 days ago

Answered
How can i generate 3 random points within a 2x2m grid?
I think you were on the right lines but you need to subtract one from your x and y: x=rand(1,3)*2-1; y=rand(1,3)*2-1; That'll...

9 days ago | 0

Solved


Remove the polynomials that have positive real elements of their roots.
The characteristic equation for a dynamic system is a polynomial whose roots indicate its behavior. If any of the <http://www.ma...

9 days ago

Solved


Renaming a field in a structure array
MATLAB has a <http://www.mathworks.com/help/techdoc/ref/setfield.html setfield> and a <http://www.mathworks.com/help/techdoc/ref...

9 days ago

Solved


DNA N-Gram Distribution
Given a string s and a number n, find the most frequently occurring n-gram in the string, where the n-grams can begin at any poi...

9 days ago

Solved


Pattern matching
Given a matrix, m-by-n, find all the rows that have the same "increase, decrease, or stay same" pattern going across the columns...

9 days ago

Solved


It dseon't mettar waht oedrr the lrettes in a wrod are.
An internet meme from 2003 (read more <http://www.snopes.com/language/apocryph/cambridge.asp here>) asserted that readers are re...

10 days ago

Solved


What is the next step in Conway's Life?
Given a matrix A that represents the state of <http://en.wikipedia.org/wiki/Conway's_Game_of_Life Conway's game of Life> at one ...

10 days ago

Solved


Word Counting and Indexing
You are given a list of strings, each being a list of words divided by spaces. Break the strings into words, then return a maste...

10 days ago

Solved


Find state names that end with the letter A
Given a list of US states, remove all the states that end with the letter A. Example: Input s1 = 'Alabama Montana Nebras...

10 days ago

Solved


Is my wife right? Now with even more wrong husband
Again, as in "Is my wife right?" ( <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right> ), answer 'yes' r...

10 days ago

Answered
Collapse contour plots on a single plot
If you just want them all on a single plot then just do: contour(x1,y1,z1) hold on contour(x2,y2,z2) and so on... If you wa...

11 days ago | 0

Answered
Unable to predict data well enough
I am far from an expert in this area but I'd guess that you are struggling to get a good preciction because you don't have enoug...

11 days ago | 1

| accepted

Answered
Problem in drawing curves after solving ode equations
I think your issue comes from the y(:,2)-N_0 part of your r_R expression. This is asking to take a number away from a number...

12 days ago | 0

| accepted

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