# Joshua Levin Kurniawan

Hello, my name is Levin, I am a Flight Mechanics Engineer and a final year Aerospace Engineer student who specialized in MATLAB, Simulink, and C programming. Currently, I am interested in control, unmanned aerial vehicles, and their application topics.

**Programming Languages:**

C

**Spoken Languages:**

English

**Pronouns:**

He/him

**Professional Interests:**

Control Design, Control Systems, Aerospace Engineering, Aerospace and Defense

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How to validate that one datetime is greater than another

You can use traditional logical operator for datatime. Operator "<", if true, means that the first datatime will occurs sooner t...

5 months ago | 0

Question

Using fmincon to optimize Simulink model for optimal trajectory

Hello, so i want to search for optimal trajectory (by defining spline) position input to the Simulink Simscape Multibody model t...

5 months ago | 1 answer | 0

### 1

answerSolved

Chess probability

The difference in the ratings between two players serves as a predictor of the outcome of a match (the <http://en.wikipedia.org/...

5 months ago

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QWERTY Shift Encoder

Encode a string using the QWERTY shift code. This code is where you touch type but are offset by one character to the right. O...

5 months ago

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Guess Cipher

Guess the formula to transform strings as follows: 'Hello World!' --> 'Ifmmp Xpsme!' 'Can I help you?' --> 'Dbo J ifm...

5 months ago

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Perimeter of a semicircle

Given the diameter d, find the perimeter of a semicircle

5 months ago

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Given a square and a circle, please decide whether the square covers more area.

You know the side of a square and the diameter of a circle, please decide whether the square covers more area.

5 months ago

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Approximation of Pi

Pi (divided by 4) can be approximated by the following infinite series: pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... For a given number of...

5 months ago

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Pi Digit Probability

Assume that the next digit of pi constant is determined by the historical digit distribution. What is the probability of next di...

5 months ago

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radius of a spherical planet

You just measured its surface area, that is the input.

5 months ago

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Pi Estimate 1

Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation1.pdf>

5 months ago

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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...

5 months ago

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Find the maximum number of decimal places in a set of numbers

Given a vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not count...

5 months ago

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Make roundn function

Make roundn function using round. x=0.55555 y=function(x,1) y=1 y=function(x,2) y=0.6 y=function(x,3) ...

5 months ago

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Rounding off numbers to n decimals

Inspired by a mistake in one of the problems I created, I created this problem where you have to round off a floating point numb...

5 months ago

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Matlab Basics - Rounding III

Write a script to round a large number to the nearest 10,000 e.g. x = 12,358,466,243 --> y = 12,358,470,000

5 months ago

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Matlab Basics - Rounding II

Write a script to round a variable x to 3 decimal places: e.g. x = 2.3456 --> y = 2.346

5 months ago

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Check that number is whole number

Check that number is whole number Say x=15, then answer is 1. x=15.2 , then answer is 0. http://en.wikipedia.org/wiki/Whole_numb...

5 months ago

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MATLAB Basic: rounding IV

Do rounding towards plus infinity. Example: -8.8, answer -8 +8.1 answer 9 +8.50 answer 9

5 months ago

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MATLAB Basic: rounding III

Do rounding towards minus infinity. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 8

5 months ago

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MATLAB Basic: rounding II

Do rounding nearest integer. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 9

5 months ago

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MATLAB Basic: rounding

Do rounding near to zero Example: -8.8, answer -8 +8.1 answer 8

5 months ago

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Vector creation

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

5 months ago

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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 ...

5 months ago

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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 ...

5 months ago

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Whether the input is vector?

Given the input x, return 1 if x is vector or else 0.

5 months ago