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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago | 1

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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 months ago | 1

| accepted

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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...

5 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months 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 months ago | 0

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago

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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 months ago | 0

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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 months ago

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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 months ago

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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 months ago | 0