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Mark Posen


Last seen: Today

RPC Telecommunications Ltd.

403 total contributions since 2020

I am a satellite communication engineer, specialising in spectrum and regulatory engineering, interference analysis and frequency coordination.

I have been programming since the mid-1970s (I used to be able to code by hand-punching Hollerith Cards!) but for the past 20-years or so I have really not done much coding at all. I'm trying to remedy that by learning MATLAB!

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Solved


Duplicate a character
Duplicate a character 'n' times. Example 1: str='a' n=5 output='aaaaa' Example 2: str='*' n=3 output='***'

2 dagar ago

Solved


Insert zeros into vector
Insert zeros after each elements in the vector. Number of zeros is specified as the input parameter. For example: x = [1 ...

3 dagar ago

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No Twins?
Write a function that accepts as input a vector and returns the same vector, but retaining only the first occurrence of an eleme...

5 dagar ago

Solved


Remove NaN ?
input -> matrix (n*m) with at least one element equal to NaN; output -> matrix(p*m), the same matrix where we deleted the enti...

6 dagar ago

Solved


Number Puzzle - 096

7 dagar ago

Solved


Number Puzzle - 094

8 dagar ago

Solved


Number Puzzle - 093

8 dagar ago

Solved


Matlab Basics - Create a row vector
Write a Matlab script to create a row vector of 10 consecutive numbers x = [1 2 3 4 5 6 7 8 9 10]

8 dagar ago

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Number of toolboxes?
Return a number equal to the number of toolboxes available to the Cody solvers.

8 dagar ago

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Find out missing number from a vector of 9 elements
You are given a vector of size 9, x = [x1 x2 x3 x4 x5 x6 x7 x8 x9] Elements of x may be randomly selected without repeati...

8 dagar ago

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Number of Circles in a Number
Given a number, return the number of closed 'circles' in the base 10 numerical representation. Note: the number 4 has no circ...

9 dagar ago

Solved


Compute the missing quantity among P, V, T for an ideal gas
Consider 100 mol of helium gas at a certain pressure (P), volume (V), and temperature (T). Assuming that the ideal gas law appli...

10 dagar ago

Solved


Phoneword Translator
Given an alphanumeric telephone number (Ex. 1-800-COLLECT), return the purely numeric phone number as a vector. This problem use...

11 dagar ago

Solved


English to Pig Latin Translator
Pig latin is a faux-language based off of English. The rules are as follows (excerpted from the wikipedia entry for Pig Latin): ...

12 dagar ago

Solved


The Dark Side of the Die
It is well-known that opposite sides of a classic hexahedral die add to 7. Given a vector of dice rolls, calculate the sum of th...

12 dagar ago

Solved


Check to see if a Sudoku Puzzle is Solved
*Description:* Your task, should you choose to accept it, is to make a function that checks to see if a 9x9 matrix of integer...

12 dagar ago

Solved


Return 'on' or 'off'
When the input is true, return 'on', otherwise, return 'off'.

13 dagar ago

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Trimming Spaces
Given a string, remove all leading and trailing spaces (where space is defined as ASCII 32). Input a = ' singular value deco...

13 dagar ago

Solved


surface of a spherical planet
you just discovered its circumference, that is the input.

13 dagar ago

Solved


Make a Palindrome Number
Some numbers like 323 are palindromes. Other numbers like 124 are not. But look what happens when we add that number to a revers...

13 dagar ago

Solved


Remove the two elements next to NaN value
The aim is to *remove the two elements next to NaN values* inside a vector. For example: x = [6 10 5 8 9 NaN 23 9 7 3 21 ...

14 dagar ago

Solved


Output any real number that is neither positive nor negative
Output any real number that is neither positive nor negative

14 dagar ago

Solved


Flip the bit
Given an input character string (e.g. '1001'), return a character string with the bits flipped ('0110').

14 dagar ago

Solved


Pattern matching
Given a matrix, m-by-n, find all the rows that have the same "increase, decrease, or stay same" pattern going across the columns...

14 dagar ago

Solved


Number Puzzle - 087

15 dagar ago

Solved


Number Puzzle - 086

16 dagar ago

Solved


Number Puzzle - 085

16 dagar ago

Solved


Number Puzzle - 084

16 dagar ago

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