Muslim Fasting Calendar 2018

The Prophet Muhammad , peace be upon him, said :

By Him in Whose Hands my soul is, the smell coming out from the mouth of fasting person is better in sight of Allah than the smell of musk. (allah says about the fasting person), “He has left his food, drink, and desires for My Sake. The fast is for Me. So I will reward (the fasting person) for it and the reward of good deeds is multiplied ten times.”

^reference : Sahih al-Bukhari 1894^

So , I present to, especially myself, my brother, and sister as a reminder this Muslim Fasting Calendar 2018 which can be obtained in this repository or simply download at :

English Version

PNG : https://goo.gl/UZuKsW

PDF : https://goo.gl/qbtQA6

Bahasa Version

PNG : https://goo.gl/T7Nw6C

PDF : https://goo.gl/EDbgmk

May Allah grant us ease to do good deeds and accept our good deeds. There is no power and no strength except with Allah. Feel free to share to relatives and family.

Jazakumullahu khairan katsiran.

NB:

1. This calendar is only a prediction. If you find any unmatch date, please adjust with the correct one.

2. If you have issues related to this, please kindly contact me via www.github.com/linerocks/FastingCalendar2018 on tab issues

Matrix Construction in C++ using Armadillo

As a follow-through of vector, we go on matrix construction. Starting from the definition, matrix is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns. The individual items in an $m \times n$ matrix $A$ often denoted by $a_{ij}$ or so-called elements, where $i$ is row index and $j$ is column index.

Because of there is no container for matrix in C/C++ standard library, let’s make our way construction matrix. In C we could use pointer of array or pointer of pointer as follows :

int m = 4, n = 3, i;

// Using pointer of array
int *B[m];
for (i = 0; i < m; i++) {
    A[i] = (int *) calloc(n, sizeof(int));
}

// Using pointer of pointer
int **B = (int **) calloc(m, sizeof(int *));
for (i = 0; i < m; i++) {
    B[i] = (int *) calloc(n, sizeof(int)); 
}

Vector Construction in C++ using Armadillo

A collection of data in a row (or column) which may be summed together, multiplied by number, and having the same type (for instance real number, integer, complex number, float) is called vector. In programming, we tend to be familiar with array. Either in mathematics or programming, vector is accessed using index. For example, assume we have a vector $\mathbf{v}​$ that comprise $v_1​$, $v_2​$, $v_3​$, and so forth. Alternatively,

$$\mathbf{v}=v_1 \hat{i} + v_2 \hat{j} + v_3 \hat{k}$$

FFTW3 : C++ Implementation on MATLAB/OCTAVE Perspective

I used to code using MATLAB and OCTAVE for my signal processing research. But, when it comes to real implementation and performance, I always stop and wonder how to make my concept coded in C/C++. Moreover, my MATLAB license is expired. All I need is Fourier Transform because it is the basic operation for signal processing. Then I made research on how Fourier Transform could be done in C/C++. I ended up on Fast Fourier Transform in the West (FFTW). It is considered the best and fastest FFT implementation in C/C++.

In this article, I would like to demonstrate basic forward and inverse transform of monotone signal. Because of we use audo signal in assumption, so this is 1D FFT problem. Well I think this simple example could be an entrance gate for MATLAB and OCTAVE programmers to implement their concepts on C/C++. I hope this article can be helpful for us.