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Muhamed Sewidan


Last seen: etwa 4 Jahre vor Aktiv seit 2019

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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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Gelöst


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...

mehr als 4 Jahre vor

Frage


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...

mehr als 4 Jahre vor | 0 Antworten | 0

0

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Frage


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....

fast 5 Jahre vor | 0 Antworten | 0

0

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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...

fast 5 Jahre vor | 1 Antwort | 0

1

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Frage


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?

fast 5 Jahre vor | 1 Antwort | 0

1

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Gelöst


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...

fast 5 Jahre vor

Gelöst


Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

fast 5 Jahre vor

Frage


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...

fast 5 Jahre vor | 2 Antworten | 0

2

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Gelöst


Vector creation
Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

fast 5 Jahre vor

Gelöst


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 ...

fast 5 Jahre vor

Gelöst


Create a vector
Create a vector from 0 to n by intervals of 2.

fast 5 Jahre vor

Gelöst


Find max
Find the maximum value of a given vector or matrix.

fast 5 Jahre vor

Gelöst


Inner product of two vectors
Find the inner product of two vectors.

fast 5 Jahre vor

Gelöst


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 ...

fast 5 Jahre vor

Gelöst


Arrange Vector in descending order
If x=[0,3,4,2,1] then y=[4,3,2,1,0]

fast 5 Jahre vor

Frage


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...

etwa 5 Jahre vor | 1 Antwort | 0

1

Antwort

Frage


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?

etwa 5 Jahre vor | 1 Antwort | 0

1

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Frage


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...

etwa 5 Jahre vor | 0 Antworten | 0

0

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Gelöst


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.

etwa 5 Jahre vor

Gelöst


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...

etwa 5 Jahre vor

Gelöst


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...

etwa 5 Jahre vor

Gelöst


Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

etwa 5 Jahre vor

Gelöst


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...

etwa 5 Jahre vor

Gelöst


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...

etwa 5 Jahre vor

Gelöst


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...

etwa 5 Jahre vor

Gelöst


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....

etwa 5 Jahre vor

Gelöst


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...

etwa 5 Jahre vor

Gelöst


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.

etwa 5 Jahre vor

Gelöst


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...

etwa 5 Jahre vor

Frage


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. ...

etwa 5 Jahre vor | 1 Antwort | 0

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