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Muhamed Sewidan
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Hi, my name is Muhamed a physicist who is interested in puzzles whether they are embedded in the nature around us or in coding.
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Crop an Image
A grayscale image is represented as a matrix in MATLAB. Each matrix element represents a pixel in the image. An element value re...
circa 3 anni fa
Domanda
My code takes so long to execute
My code works fine until it gets to this block. This loop takes too long to execute. Is there any way to solve this problem? if...
oltre 3 anni fa | 0 risposte | 0
0
risposteDomanda
How to fit two separate variables with smoothing spline, Gauusian or polynomial?
I have these two variables and want to fit and plot them. lam = [0.30,0.31,0.32,0.33,0.34,0.35,0.36,0.38,0.39,0.41,0.43,0.45,0....
oltre 3 anni fa | 0 risposte | 0
0
risposteDomanda
How to make the frequency vector to analyze a complex signal?
I have this example and I'm puzzled with the frequency vector (hz) if I change any parameter in it, the result won't be the freq...
oltre 3 anni fa | 1 risposta | 0
1
rispostaDomanda
In "Analyzing Cyclical Data with FFT" example, how the frequency was calculated?
and how it can be calculated for other examples? is there a general equation or formula to calculate it?
oltre 3 anni fa | 1 risposta | 0
1
rispostaRisolto
Calculate area of sector
A=function(r,seta) r is radius of sector, seta is angle of sector, and A is its area. Area of sector A is defined as 0.5*(r^2...
quasi 4 anni fa
Risolto
Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...
quasi 4 anni fa
Domanda
Should I use the absolute value of fast Fourier transform or the conjugate in signal analysis?
I found this example in MATLAB https://www.mathworks.com/help/matlab/math/fft-for-spectral-analysis.html and I saw that they use...
quasi 4 anni fa | 2 risposte | 0
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risposteRisolto
Vector creation
Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.
quasi 4 anni fa
Risolto
Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...
quasi 4 anni fa
Risolto
Flip the vector from right to left
Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...
quasi 4 anni fa
Domanda
How to draw multiple surface plots on the same mesh?
I use this code to draw a Gaussian normal distribution. I want to plot several distributions at equal distance from the original...
quasi 4 anni fa | 1 risposta | 0
1
rispostaDomanda
How to calculate the diameter of 3D Gaussian normal distribution?
I want to calculate the diameter of this gaussian distribution. Is there any simple mean to do so?
quasi 4 anni fa | 1 risposta | 0
1
rispostaDomanda
Any code for Gaussian beams diffraction through a rectangle aperture?
Suppose I have a rectangle aperture and I want to make Gaussian beams to sufficiently sample this aperture. Is there any code to...
quasi 4 anni fa | 0 risposte | 0
0
risposteRisolto
Magic is simple (for beginners)
Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.
quasi 4 anni fa
Risolto
Make a random, non-repeating vector.
This is a basic MATLAB operation. It is for instructional purposes. --- If you want to get a random permutation of integer...
quasi 4 anni fa
Risolto
Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...
quasi 4 anni fa
Risolto
Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...
quasi 4 anni fa
Risolto
Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...
quasi 4 anni fa
Risolto
Number of 1s in a binary string
Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...
quasi 4 anni fa
Risolto
Return the first and last character of a string
Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...
quasi 4 anni fa
Risolto
Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....
quasi 4 anni fa
Risolto
Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...
quasi 4 anni fa
Risolto
Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.
quasi 4 anni fa
Risolto
Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...
quasi 4 anni fa
Domanda
Can I simulate this example (diffraction pattern) on my CPU not my GPU?
I tried to apply this example but it doesn't work, because I don't have an external Nividea GPU, I have an intel internal GPU. ...
quasi 4 anni fa | 1 risposta | 0