Solved

Odd elimination
Inspired by Project Euler problem #539 You'll be given a vector from 1 to n; Going from left to right, remove the first n...

1 year ago

Solved

Pseudo Square Root (Inspired by Project Euler 266)
Shamelessly copied from the Project Euler page for Problem 266: ------------- The divisors of 12 are: 1,2,3,4,6 and 12. T...

1 year ago

Solved

There are 10 types of people in the world
Those who know binary, and those who don't. The number 2015 is a palindrome in binary (11111011111 to be exact) Given a year...

1 year ago

Solved

Make a Plot with Functions
Make a plot and test

1 year ago

Solved

Some Assembly Required
The input to this function is a matrix of real numbers. Your job is to assemble the rows of the matrix into one large row that ...

1 year ago

Solved

Day counter function
Write a function called _day_counter_ that returns the number of Mondays that fell on the first day of the month in a given year...

1 year ago

Solved

Matlab Basics - y as a function of x
Write a function to calculate y as a function of x, such that y = 6x^2 + 5x - 2

1 year ago

Solved

Back to basics 9 - Indexed References
Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix and row and column, output the index of th...

1 year ago

Solved

Calculate the square of a number (Super Easy)
The goal is to calculate the square (y) of a number (x). Good way to start MatLab for beginners.

1 year ago

Solved

Is it a number?
Determine if input is numeric. If it is,output is 1; if it is not, output is 0.

1 year ago

Solved

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...

1 year ago

Solved

Swap rows

1 year 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...

3 years 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...

3 years 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 ...

3 years ago | 7

| 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...

3 years 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 ...

3 years 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...

3 years 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 -...

3 years 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...

3 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...

3 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...

3 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...

3 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 ...

3 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...

3 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 = ...

3 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:...

3 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...

3 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...

3 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 ...

3 years ago