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Find the nearest prime number
Happy 5th birthday, Cody! Since 5 is a prime number, let's have some fun looking for other prime numbers. Given a positive in...
8 years 前
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Basic electricity in a dry situation
⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ &#...
8 years 前
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Energy of a photon
*⚛ ☢ ⚛ ☢ ⚛ ☢ ⚛* Given the frequency F of a photon in giga hertz. Find energy E of this...
8 years 前
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Digit concentration in Champernowne's constant
Consider the first 50 digits of Champernowne's constant 0.12345678910111213141516171819202122232425262728293... The...
8 years 前
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Acid and water
⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ Assume that there is a 100 liter tank. It is initially fi...
8 years 前
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"Cody" * 5 == "CodyCodyCodyCodyCody"
*Alice*: What? *"Cody" * 5 == "CodyCodyCodyCodyCody"*? You've gotta be kidding me! *Bob*: No, I am serious! Python supports...
8 years 前
已解决
5th Time's a Charm
Write a function that will return the input value. However, your function must fail the first four times, only functioning prope...
8 years 前
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Number of Even Elements in Fibonacci Sequence
Find how many even Fibonacci numbers are available in the first d numbers. Consider the following first 14 numbers 1 1 2...
8 years 前
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An asteroid and a spacecraft
🚀 Imagine a non-relativistic simple situation. Assume positions p0, p1, p2, and p3 are three dimensional Cartesian ...
8 years 前
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The 5th Root
Write a function to find the 5th root of a number. It sounds easy, but the typical functions are not allowed (see the test su...
8 years 前
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How to subtract?
*± ± ± ± ± ± ± ± ± ± ±* * Imagine you need to subtract one...
8 years 前
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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...
8 years 前
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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...
8 years 前
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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...
8 years 前
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Back and Forth Rows
Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...
8 years 前
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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...
8 years 前
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Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...
8 years 前
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Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...
8 years 前
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Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...
8 years 前
提问
sorting a cell - with respect to its name
I have a cell which is sized 5x18. i made it using S = struct2cell(dir('*.mp3')); I was going through http://www.mathwork...
14 years 前 | 0 个回答 | 0
0
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Finding the number of consecutive points in a given vector, using a condition
suppose i have a vector A=[0.2, 0.3, 4,5,6,7,0.2,0.4,0.5,0.3]; I have to find all those points which are less than 1, and o...
14 years 前 | 1 个回答 | 0
1
个回答已解决
Determine if input is odd
Given the input n, return true if n is odd or false if n is even.
14 years 前
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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...
14 years 前
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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. Example...
14 years 前
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Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...
14 years 前
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Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...
14 years 前
已解决
Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...
14 years 前
提问
help needed on dfilt.fftfir
I am pretty much failing to run the following code: [song,f]=wavread('D:\song.wav'); song=(song(:,1)+song(:,2))/2; cut=song...
14 years 前 | 1 个回答 | 0
1
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Problem using xcorr
I am running the following code to find out the number of times a portion of the original signal is repeated in the audio. ...
14 years 前 | 1 个回答 | 0
