Omar Rayhan Khalif

Who am I?

My name is Omar, i was born March 9th, 2000 in Jakarta. Currently i'm a college student in University of Indonesia, majoring in Naval Architect and Marine Engineering, batch 2018. The reason i chose this major is because i want to make Indonesia's maritime sector become the best in Asia, even in the world, because Indonesia has so much potential in that sector that we haven't explored.

Coding Experience

I was enrolled in a coding class during senior highschool, hosted by Zenius. But it was in the 10th grade, so i'm kind of forgot about all the formulas. But i had some experience in coding as well

TUGAS 01 METNUM

Do a given F(x) formula :

1. Do it manually

2. And then do it with a computer (use software)

3. Give your analysis and comment about your answer

4. Upload it in air.eng,ui.ac.id

ANSWER

1. Manual Answer :

Analysis :

First of all you just have to do some equation with the quadratic number, in this case a squared x. By making it (x+1)(x-1) After that you can eliminate the (x-1) with the same number below, so all you have left is the (x+1). So, for example if x is 1, then the answer is 2.

2. Software Answer (Ms. Excel) :

Ms.Excel

Analysis :

Excel couldnt get the numbers right because, its divided is 0/0, which is an error because Excel substitute the amount of x, which is one, at the very beginning. So the top one is (1^2-1) when the bottom one is (1-1). There you get the result which is 0/0

TUGAS 02 METNUM

Pada tugas kali ini saya memilih mengerjakan sebuah problem set 3.2 dari buku Numerical Methods in Engineering with Python 3 no. 9, tentang pengerjaan Least Square melalui cara manual dan cara software menggunakan Python.

CARA MANUAL

Analisis :

Dengan cara manual, saya mengerjakan soal tersebut dengan menggunakan metode sigma x tidak sama dengan nol, sehingga rumus yang digunakan untuk mencari nilai b menjadi cukup panjang. Namun pada akhirnya, saya berhasil menemukan nilai b dan a tersebut, sehingga fungsi least square straight line/garis lurus berhasil ditemukan, yakni y=-6.045+9.38x

CARA PYTHON

Saya memasukan rumus yang terdapat dalam buku Metnum tentang Least Square, yang sesuai dengan soal yang saya pilih, namun angkanya saya sesuaikan dengan soal yang saya pilih.

Karena fungsi kuadrat f(x) = 0.1113 + 2.8512x 1.3683x^2 menghasilkan deviasi standar yang terkecil diantara 2 hasil lainnya, maka itu dapat dianggap sebagai yang paling fit untuk data. tapi perlu diingatkan, bahwasannya deviasi standar terkecil bukanlah pengukuran yang reliable untuk goodness of fit.