Community Profile Shlomo Geva

Last seen: 21 jours ago Active since 2017

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Question

How to return a uint64_t from a mex function?
I want to assign to plhs a scalar of type uint64_t. Not sure what function to call. e.g. if I have uint64_t y=123; and I...

environ 2 mois ago | 1 answer | 0

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how to get average of multiple rows and subtract from one group of average to another
Here is a solution to also take care of a number of rows that is not a multiple of your grouping (e.g. 30). I made up a matrix ...

11 mois ago | 0

how to get average of multiple rows and subtract from one group of average to another
%% load the fille into memory with M = csvread(filename) %% loop around M, 30 rows at a time for i=1:30:si...

11 mois ago | 0

How do I get MATLAB to compare strings in the same way as the strcmp(str1,str2) method in the ANSI C API?
function c = cstrcmp(a,b) % c style strcmp. No type checks, use only strings and char arrays. if strcmp(a,b) c=0; else ...

11 mois ago | 0

Question

Critical code section inside parfor
With C++ one can define critical code section inside a parallel for. Is there a similar construct that can be used with Matla...

11 mois ago | 2 answers | 0

2

Submitted

progressDemo
A demo of a very simple progress monitor for parfor

k distinct combinations of size p without replacement
You can get this as follows: 1. First generate all binary vectors of size 2^N n=dec2bin(0:2^N-1)-'0'; in the examplll...

environ un an ago | 0

Find multiple elements in an array.
function out = findMultipleElements(a,b) % Find multiple elements in an array % example: % a = [1 5 2 5 3 5 4 2...

environ un an ago | 0

Solved

Rewrite setdiff to account for non-unique values
Setdiff(a,b) is a function that will remove all values of b from a. Sometimes, you need this function to do a little bit extra,...

environ un an ago

Solved

Renaming a field in a structure array
MATLAB has a <http://www.mathworks.com/help/techdoc/ref/setfield.html setfield> and a <http://www.mathworks.com/help/techdoc/ref...

environ un an ago

Solved

Implement a ROT13 cipher
Replace each character in string s1 with the character that is shifted 13 positions from it (wrap back to the beginning if neces...

environ un an ago

Solved

Remove all the consonants
Remove all the consonants in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill'; Output s2 is 'a ...

environ un an ago

Solved

Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

environ un an ago

Solved

Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

environ un an 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...

environ un an ago

Solved

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

environ un an ago

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Sums with Excluded Digits
Add all the integers from 1 to n in which the digit m does not appear. m will always be a single digit integer from 0 to 9. no...

environ un an ago

Solved

Making change
Given an amount of currency, return a vector of this form: [100 50 20 10 5 2 1 0.5 0.25 0.1 0.05 0.01] Example: Input a = ...

environ un an ago

Solved

<http://en.wikipedia.org/wiki/Benford%27s_law Benford's Law> states that the distribution of leading digits is not random. This...

environ un an 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 ...

environ un an ago

Solved

Which doors are open?
There are n doors in an alley. Initially they are all shut. You have been tasked to go down the alley n times, and open/shut the...

environ un an 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...

environ un an ago

Solved

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

environ un an ago

Solved

Cell joiner
You are given a cell array of strings and a string delimiter. You need to produce one string which is composed of each string fr...

environ un an ago

Solved

Find the alphabetic word product
If the input string s is a word like 'hello', then the output word product p is a number based on the correspondence a=1, b=2, ....

environ un an ago

Solved

Remove the polynomials that have positive real elements of their roots.
The characteristic equation for a dynamic system is a polynomial whose roots indicate its behavior. If any of the <http://www.ma...

environ un an ago

Solved

Subset Sum
Given a vector v of integers and an integer n, return the the indices of v (as a row vector in ascending order) that sum to n. I...

environ un an ago

Solved

Reverse Run-Length Encoder
Given a "counting sequence" vector x, construct the original sequence y. A counting sequence is formed by "counting" the entrie...

environ un an ago

Solved

Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

environ un an ago

Solved

Return a list sorted by number of occurrences
Given a vector x, return a vector y of the unique values in x sorted by the number of occurrences in x. Ties are resolved by a ...

environ un an ago