Community Profile # Mohammed Hamaidi

Last seen: 2 months ago Active since 2021

Programmer

Spoken Languages:
Arabic, English, French

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How to define second derivative in symbolic
dr/dA = -sin(A)*(dA/d) d²r/dA² = -cos(A)*(dA/d)^2-sin(A)*d²A/d²

4 months ago | 0

Floor/Fix rounds the result of a division (60.000) to 59
Hi Just use: s=round(a/b)

4 months ago | 0

Sparse matrix calculate warning: Matrix is close to singular or badly scaled.
You don't have to correct any thing. The matrix is ​​close to singular (the determinant close to zero) Matlab indicate that Re...

5 months ago | 0

How I use quiver to plot 3+2i
Just use: quiver(3,2,1) for any complex number c, use: quiver(real(c),imag(c),1)

5 months ago | 1

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Split and count unique string in cell array
A loop solution: C=unique(A);nc=length(C); B=char(A);nb=length(B); D=zeros(nc,1); for i=1:nc for j=1:nb if str...

5 months ago | 0

Check if a vector and matrix are orthogonal (MATLAB)
See this :Low-density_parity-check_code Orthogonality mean 'mod 2=0'

5 months ago | 0

The meaning and function of codes on programming
size(permutataions,1) It just compute the number of ppossible permutations. randi([1 max_choice]) is a random choise the ge...

5 months ago | 1

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Array slice indexing?
Take for example: a=[1 2 3; 5 6 7; 8 9 12] and i=2 then a(i,end:-1:1) gives: the 2nd row in right to left order (the eleme...

5 months ago | 0

My yellow led control doesn't work on my gui
Just change this two lines %set callback for h10 (yellow on) set (h11, 'Callback', 'yellow_led_control(h11, h12, h10, id_flag,...

5 months ago | 0

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Write a program that calculates the length of hypotenuse c for all (!) combinations of legs a and b and do so using a for loop!
An other way without loop a = [3;5;1;3;2]; b = [1;3;2;7;2]; [A B]=meshgrid(a,b); C=[A(:),B(:)]; c=sqrt(C(:,1).^2+C(:,2).^2)...

5 months ago | 0

Question

Complex numbers not in fundamental class?
Hi Community Since a complex number is 1x1 array, why isn't in fundamental class type of datas?

5 months ago | 1 answer | 0