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Last seen: 2 days ago Active since 2016

Working in mathematical biology.

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The Piggy Bank Problem
Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...

3 months ago

Solved


Swap rows

3 months ago

Solved


Finding sum of even numbers in a vector.
Find the sum of all the even numbers present in the input vector x. Examples: Input x = [1 2 3 4] Output y is 6 Input...

1 year ago

Answered
Issues with findpeaks()
I must stress that I am not sure and I don't have acces to the Signal Processing Toolbox to check. However, have you tried rever...

1 year ago | 1

| accepted

Answered
hide legend for certain curves in a Matlab plot
If you aren't fussed about actually doing this within the code then you can select the lines, open up the property editor, find ...

1 year ago | 2

| accepted

Answered
Loop and write into a cell
This part of your code: for k=1:10 c{k}=sum(p(1:,k) 1)) end has two open (left) brackets and three close (right) b...

1 year ago | 0

Answered
Need to solve a nonlinear ODE using matlab
There are a range of ODE solvers available in MATLAB that could do this. The following link can help you pick which one is most ...

1 year ago | 0

Answered
HELP! My for loop code won't produce a line on the graph I plot
I'm not 100% sure but I'd guess you want the last line to be: semilogx(A,F) because otherwise everything is plotting at the sa...

1 year ago | 0

Answered
How to write this matlab code?
Assuming you want the mean of the whole matrix (not mean by row/column or something else) then the first line will be: A = (B -...

1 year ago | 0

Answered
Jumping over several loops
There are a few ways of doing this. They have largely been covered in the below links: https://uk.mathworks.com/matlabcentral/a...

2 years ago | 0

Answered
Smooth bad data in MattLab
I think you could easily do this by using find to locate the indices of all values lying in the shifted range. This would be som...

2 years ago | 0

| accepted

Answered
How to select certain columns of a matrix only when the values in the 4th row are bigger than three values of the other four rows in that particular column?
For the example in your question, the following will work: [~,c] = size(A); a = ones(1,c); for col = 1:c if((sum(abs(A(4...

2 years ago | 1

| accepted

Answered
Finding indices of first maximum value and last minimum value of a square wave
You could use f = find ( y > threshold ) to find the indices corresponding to all values that exceed some threshold value. The...

2 years ago | 0

Solved


Special matrix
Make a square matrix with this shape. For n=4 M = 1 1 0 0 1 0 1 0 0 1 0 ...

2 years ago

Solved


Make a Star Pyramid
Create a star pyramid. First line will have 1 star, second will have two stars and so on... a basic program which is easily done...

2 years ago

Solved


"mirror" matrix
Create n x 2n "mirror" matrix of this type: Examples For n = 2 m = [ 1 2 2 1 1 2 2 1 ] For n = 3 m = ...

2 years ago

Solved


Better bullseye matrix
<http://www.mathworks.com/matlabcentral/cody/problems/18-bullseye-matrix Problem 18> asks to create a bullseye matrix like this:...

2 years ago

Solved


Height of a right-angled triangle
Given numbers a, b and c, find the height of the right angled triangle with sides a and b and hypotenuse c, for the base c. If a...

2 years ago

Solved


Right Triangle Side Lengths (Inspired by Project Euler Problem 39)
If _p_ is the perimeter of a right angle triangle with integral length sides, { _a_, _b_, _c_ }, there are exactly three solutio...

2 years ago

Solved


Find the sides of an isosceles triangle when given its area and height from its base to apex
Find the sides of an isosceles triangle when given its area and the height from its base to apex. For example, with A=12 and ...

2 years ago

Solved


Can we make a triangle?
Given three positive number, check whether a triangle can be made with these sides length or not. remember that in a triangle su...

2 years ago

Solved


Is the Point in a Triangle?
Check whether a point or multiple points is/are in a triangle with three corners Points = [x, y]; Triangle = [x1, y1; x...

2 years ago

Solved


Calculate the centroid of a triangle
Info: https://en.wikipedia.org/wiki/Centroid Example Input: x = [0 0 1]; % x-coordinate y = [0 1 0]; % y-coordinat...

2 years ago

Solved


Calculate the area of a triangle between three points
Calculate the area of a triangle between three points: P1(X1,Y1) P2(X2,Y2) P3(X3,Y3) these three points are the vert...

2 years ago

Solved


Find my daddy long leg (No 's')
Given the ratio of the two legs (longer / shorter), and the hypotenuse length, find the value of the bigger leg.

2 years ago

Solved


Convert matrix to 3D array of triangular matrices
Given a 2D numeric array x in which each column represents the vectorized form of an upper triangular matrix, return a 3D array ...

2 years ago

Solved


MatCAT - Reconstruct X from Its X-rays
Consider a matrix x x = [ 1 2 0 0 5 0 3 0 8 ] If we sum x along the rows we get row_sums = [3 5 11] ...

2 years ago

Solved


The sliding puzzle: 15
If you are unfamiliar with the sliding puzzle, enter the command _fifteen_ in your MATLAB command window (or search online, of c...

2 years ago

Solved


Free passes for everyone!
_Simply return the name of the coolest numerical computation software ever_ *Extra reward* (get a _freepass_): Once a mont...

2 years ago

Answered
Hi, I have set of values for x (x = 1:10) and I have a equation y = x^(1/2)/x, how can i get and display an array of values of y from the x's ?
I don't know how you've got one number but I think you should be using: x = 1:10 y = x.^(1/2)./x

2 years ago | 0

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