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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...

9 mesi 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...

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...

9 mesi 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 ...

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 ...

10 mesi ago | 1

| 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...

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...

10 mesi 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 ...

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 ...

11 mesi 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...

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...

11 mesi 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 -...

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 -...

11 mesi 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...

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...

11 mesi 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...

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...

11 mesi 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...

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...

11 mesi 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...

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...

11 mesi 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 ...

12 mesi 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...

12 mesi 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 = ...

12 mesi 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:...

12 mesi 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...

12 mesi 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...

12 mesi 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 ...

12 mesi ago

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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...

12 mesi 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...

12 mesi 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...

12 mesi 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...

12 mesi ago

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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.

12 mesi ago

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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 ...

12 mesi 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] ...

12 mesi 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...

12 mesi ago

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Free passes for everyone!

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

12 mesi 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

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

12 mesi ago | 0

Answered

how can i save variables in a for loop?

If your issue is how to get the file names then you can use: save( strcat( 'DesignResults_', num2str(n) ); within your loop an...

how can i save variables in a for loop?

If your issue is how to get the file names then you can use: save( strcat( 'DesignResults_', num2str(n) ); within your loop an...

12 mesi ago | 0

Solved

Hankelize a matrix

Similar to <http://www.mathworks.com/matlabcentral/cody/problems/42501-toeplitize-a-matrix Problem 42501. Toeplitize a matrix>, ...

12 mesi ago