Solved

Replace NaNs with the number that appears to its left in the row.

Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

5 mois 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...

5 mois ago

Solved

Find the longest sequence of 1's in a binary sequence.

Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

5 mois 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...

5 mois 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...

5 mois ago

Answered

How to find position of array

You can use regular expressions to do this. x = '11111100001111'; expr = '1*'; [sInd,eInd] = regexp(x, expr) This gives the ...

How to find position of array

You can use regular expressions to do this. x = '11111100001111'; expr = '1*'; [sInd,eInd] = regexp(x, expr) This gives the ...

5 mois ago | 1

| accepted

Answered

Given a matrix A, create the matrix B whose elements are the neighbor sumr for A

There are multiple indexing errors in your code Jose. Here is the rectified version. A = [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 1...

Given a matrix A, create the matrix B whose elements are the neighbor sumr for A

There are multiple indexing errors in your code Jose. Here is the rectified version. A = [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 1...

5 mois ago | 1

| accepted

Solved

Trimming Spaces

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

5 mois ago

Solved

Find the two-word state names

Given a list of states, remove all the states that have two-word names. If s1 = 'Alabama Montana North Carolina Vermont N...

5 mois 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 ...

5 mois 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...

5 mois 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...

5 mois ago

Solved

Summing digits

Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

5 mois ago

Solved

Bullseye Matrix

Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

5 mois ago

Answered

Regular expressions: number that does not begin or end with a letter

Here is a solution to your answer. This solution separates all the decimal numbers/integers from the non integers/decimals. str...

Regular expressions: number that does not begin or end with a letter

Here is a solution to your answer. This solution separates all the decimal numbers/integers from the non integers/decimals. str...

5 mois ago | 0

| accepted

Answered

variant sink declaring variables

One thing you can try here is using 2 switches. Set the threshold value in both switches and supply the inputs accordingly. For...

variant sink declaring variables

One thing you can try here is using 2 switches. Set the threshold value in both switches and supply the inputs accordingly. For...

5 mois ago | 0

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...

5 mois ago

Solved

Pascal's Triangle

Given an integer n >= 0, generate the length n+1 row vector representing the n-th row of <http://en.wikipedia.org/wiki/Pascals_t...

5 mois 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, ....

5 mois 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 ...

5 mois ago

Solved

Binary numbers

Given a positive, scalar integer n, create a (2^n)-by-n double-precision matrix containing the binary numbers from 0 through 2^n...

5 mois 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...

5 mois ago

Solved

Quote Doubler

Given a string s1, find all occurrences of the single quote character and replace them with two occurrences of the single quote ...

5 mois ago

Solved

Indexed Probability Table

This question was inspired by a Stack Overflow question forwarded to me by Matt Simoneau. Given a vector x, make an indexed pro...

5 mois ago

Solved

Find state names that start with the letter N

Given a list of US states, remove all the states that start with the letter N. If s1 = 'Alabama Montana Nebraska Vermont Ne...

5 mois ago

Solved

QWERTY coordinates

Given a lowercase letter or a digit as input, return the row where that letter appears on a <http://en.wikipedia.org/wiki/Keyboa...

5 mois ago

Answered

Euler's Method

There is a parentheses mismatch in your code for the euler's method. Replace that line with: y(i+1) = y(i) + h *(sin(x) * ( 1 ...

Euler's Method

There is a parentheses mismatch in your code for the euler's method. Replace that line with: y(i+1) = y(i) + h *(sin(x) * ( 1 ...

5 mois ago | 0

| accepted

Solved

Remove any row in which a NaN appears

Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

5 mois ago

Solved

Find the peak 3n+1 sequence value

A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

5 mois ago

Answered

Import data with column separated with a comma, and comma as decimal place symbol

One thing that you can do here is import the data and save it in a variable say 'var'. Then replace the commas by a decimal poin...

Import data with column separated with a comma, and comma as decimal place symbol

One thing that you can do here is import the data and save it in a variable say 'var'. Then replace the commas by a decimal poin...

5 mois ago | 0