Manvi Goel

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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...

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Balanced number
Given a positive integer find whether it is a balanced number. For a balanced number the sum of first half of digits is equal to...

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Find common elements in matrix rows
Given a matrix, find all elements that exist in every row. For example, given A = 1 2 3 5 9 2 5 9 3 2 5 9 ...

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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...

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Please help. Error of index out of bounds
The following errors were there in your code: inappropriate spaces in for loops spaces between clear and the variable associat...

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Multiplying 2 Matrices A and B from Scratch (not built in function
Here you go function result = mult(a, b) [r1, c1] = size(a); [r2, c2] = size(b); if( c1 == r2) result...

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Display Complete output in Command Window
You can display the output of the matrix by using the disp command. % Let a be the matrix of dim 3200 * 3200 disp(a) % display...

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"not equal to" in MATLAB
You can use the ~ instead of ! for not in MATLAB

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How to eliminate certain columns from a matrix
Let the matrix be a. You can remove the odd columns of a matrix by : a(:,1:2:end) = [] % 1:2:end runs a loop from 1 till th...

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how can we perform 6x6 matrix without values to find the inverse and determination
You can calculate the inverse and determinant of a any n*n matrix using these inbuilt functions: det(x) inv(x)

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How can I generate a code for this equation?
You can use the following code for this a = [429.494, 93.112, -6.050]; N = 1024; temp = 0; lambda = zeros(1, N) for i = 1:N...

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Ascii to char conversion and vice versa
You can get the ascii values of a character by double('a') and character value to ascii by char(97)

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Pangrams!
A pangram, or holoalphabetic sentence, is a sentence using every letter of the alphabet at least once. Example: Input s ...

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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...

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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...

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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...

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Return the 3n+1 sequence for n
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...

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Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

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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 ...

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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...

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Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

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Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

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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 + ...

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How can I swap two columns of a matrix in MATLAB?
There is an easy way to extract a column of a matrix in MATLAB Suppose you have a matrix A: A = [1, 2, 3 ; 4, 5, 6] and you...

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Randomly initialise a matrix with numbers between 0 and 1?
You can initialise a random matrix with uniform distribution between 0 and 1 by the following: randomMatrix = rand(2,5)

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Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

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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.

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Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

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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...

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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...

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