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# Pavel Roslovets

### ETMC Exponenta (MathWorks official distributor in Russia)

24 total contributions since 2016

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Submitted

App Designer: Instrument Control over Serial (Arduino example)
Example of using App Designer for buildng application to control hardware (i.e. Arduino) over Serial

Submitted

LEGO EV3 Spinner Speedometer (Stateflow)
Measure spinner speed with LEGO EV3 and Stateflow

Solved

Count number of words in string
Count number of words in string Examples 'hi', answer is 1 'hi hi', answer is 2 'I enjoy cody', answer is 3

1 month ago

Submitted

Fidget Spinner 3DOF Gyro (Simscape Multibody)
3DOF gyro psysical model of fidger spinner

Submitted

Arduino Weather Station IoT (ThingSpeak)

Submitted

Arduino Additional Sensors Library (DHT, LPS331)
Simulink blocks for DHT and LPS331 sensors

Solved

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.

8 months ago

Solved

Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

8 months ago

Solved

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...

8 months ago

Submitted

Gyroboy - self-balancing two-wheel robot (segway) based on Lego EV3
Model of EV3 segway robot with LQR controller. Could be run on hardware (EV3)

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

12 months ago

Solved

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

1 year ago

Solved

Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

1 year ago

Solved

Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

1 year ago

Solved

Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

1 year ago

Solved

Is my wife right?
Regardless of input, output the string 'yes'.

1 year ago

Solved

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

1 year ago

Solved

Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

1 year ago

Solved

Given a and b, return the sum a+b in c.

1 year ago

Solved

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

1 year ago

Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

1 year ago

Solved

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

1 year ago