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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 month 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 month ago

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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 month ago

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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 month ago

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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 month ago

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Is it a number?

Determine if input is numeric. If it is,output is 1; if it is not, output is 0.

1 month ago

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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...

4 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

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

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 ...

2 years ago | 5

| accepted

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...

2 years ago | 0

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 ...

2 years ago | 0

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...

2 years ago | 0

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 -...

2 years ago | 0

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

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

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

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

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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

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"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

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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

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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

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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

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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

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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

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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