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Chunru


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DSO National Laboratories

419 total contributions since 2013

Matlab user since 1990

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Answered
how to calculate PSNR value of two color images?
Try the following: doc psnr

alrededor de 6 horas ago | 0

Answered
Could anyone help me how to change the values of the matrix to a desired range.
Something like this: N = 10 X = zeros(N); X(1:2,:) = 1; X(3:4, 3:end)=2; X(5:6, 5:end)=3; X(7, 7:end)=5; X(8, 9:end)=6; ...

alrededor de 6 horas ago | 0

Solved


Number of 1s in the Binary Representation of a Number
*Description* Return the number of 1s in the (unsigned integer) binary representation of a number. This function should be ab...

alrededor de 8 horas ago

Solved


Back to basics 12 - Input Arguments
Covering some basic topics I haven't seen elsewhere on Cody. Return a value equal to the number of input arguments to the fun...

alrededor de 8 horas ago

Solved


Factorial Numbers
Factorial is multiplication of integers. So factorial of 6 is 720 = 1 * 2 * 3 * 4* 5 *6 Thus 6 factorial = factorial(720)....

alrededor de 8 horas ago

Solved


Reverse a matrix
Its simple. You have to reverse a given matrix.

alrededor de 8 horas ago

Solved


02 - Vector Variables 2
Make the following variable: <<http://samle.dk/STTBDP/Assignment1_2b.png>>

alrededor de 8 horas ago

Solved


MATLAB Basic: rounding
Do rounding near to zero Example: -8.8, answer -8 +8.1 answer 8

alrededor de 8 horas ago

Solved


Determine if a Given Number is a Triangle Number
*Description:* Determine if the elements of an input array are triangle numbers and return the result as an array with the sa...

alrededor de 9 horas ago

Answered
Computing 4th cumulant of Gaussian variable
When number of samples is sufficiently large, the sample mean (your fucntion output) is approaching to the true expected value (...

alrededor de 9 horas ago | 0

Answered
Change colour of line graph once a value is reached
The program is slow because it draws and updates the line segment (of two points) by segment . To speed up in the simplest way,...

alrededor de 10 horas ago | 0

| accepted

Answered
solving the Transfer function
% Divide G(s) into two parts (or manually simplify it) h1 = tf([0.02 1], [0.005 1 0 0 0]); h2 = tf([0.025 1], [0.001 1]); g =...

1 día ago | 1

| accepted

Answered
I need to create a nested struct from nested folders
% List all the file in current folder and subfolders fn = dir('**/*'); % structure for the information of all the file % f...

2 días ago | 0

Solved


Replace Nonzero Numbers with 1
Given the matrix x, return the matrix y with non zero elements replaced with 1. Example: Input x = [ 1 2 0 0 0 ...

2 días ago

Solved


Matrix multiplication across rows
Given matrix m, return matrix n such that, rows of n are result of multiplication of the rows of the input matrix Example ...

2 días ago

Solved


A matrix of extroverts
Now that the introverts have had their script, the extroverts spoke up (naturally!) and demanded one as well. You will be given...

2 días 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 días ago

Answered
Running the Same code for Multiple Files in a Folder
Here is a schetch of the solution: fn = dir('a*.txt'); % obtain the file information 'a*.txt'. make your own modification for...

2 días ago | 0

Answered
issue when creating and saving file to specific folder
When dataFolder is a variable, change directory with the following statement: cd(dataFolder) ;

2 días ago | 1

Solved


Too Many Zeros, Dump Them!
Sometimes when I create a matrix, I use this syntax: a = zeros(1000,1000); But when the function ends, I find that I don'...

2 días ago

Solved


Enlarge array
Given an m-by-n numeric array (A) and a 1-by-2 vector (sz) indicating the dimensions [p q] to enlarge each element, return an (m...

2 días ago

Solved


Remove entire row and column in the matrix containing the input values
Remove the entire row and column from the matrix containing specific values. The specified value can be a scalar or a vector. Fo...

2 días ago

Solved


frame of the matrix
Given the matrix M, return M without the external frame.

2 días ago

Solved


subtract central cross
Given an n-by-n square matrix, where n is an odd number, return the matrix without the central row and the central column.

2 días ago

Answered
Bellhop: index exceeds the number of array elements (0)
Check the quotation marks. AcousticToolbox input use the single quote " ' " for input. 260.0 1502.43 / ’A’ 0.0 260.0 1600....

2 días ago | 1

| accepted

Answered
How to vertically combine two matrices with a space in-between them?
You can insert one row of NaN. An array or matrix must be filled with numbers and cannot have blanks (unless you use strings). ...

3 días ago | 0

| accepted

Answered
Code to solve integral with cosine and theta
integrate it manually integrate it symbolically syms x f(x) = cos(x).^2 int(f(x), 0, pi/2) integrate it numerically x = li...

3 días ago | 0

| accepted

Answered
Extracting elements from one matrix and placing in another
The following will do. i = [7 10 34 52 79 82 88 94 100 115] %posi SLP_top_10 = yearly_array2(:,:,i);

3 días ago | 0

| accepted

Solved


Close MATLAB with keyboard
Close MATLAB with keyboard without using mouse

3 días ago

Solved


Back to basics 11 - Max Integer
Covering some basic topics I haven't seen elsewhere on Cody. Return the largest positive integer MATLAB can handle.

3 días ago

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