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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...

environ 11 ans il y a

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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...

environ 11 ans il y a

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how to stop the running program
Ctrl + C It'll work in most cases. You can change the key mapping in your MATLAB preferences.

environ 11 ans il y a | 0

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Is my calculation too complex for Matlab?
As Bjorn mentioned, since they're periodic they may have many solutions. However if I remember the solve command right, I think ...

environ 11 ans il y a | 0

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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...

environ 11 ans il y a

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colorbar position on imageplot with multiple figures
Colorbars are associated with a particular axis. If you do not specify which axis, then it will be added to the last one you use...

environ 11 ans il y a | 0

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imshow update in realtime, colorbar causing it to slow down
You can make visualizations inside of loops more efficient by using handle graphics to update the underlying data rather than re...

environ 11 ans il y a | 1

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is there a version of Principle Component Analysis for images?
I don't know much PCA myself, but I know we have some built-in tools in Statistics and Wavelet toolboxes that may be of use: ...

environ 11 ans il y a | 0

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What's the difference between imagesc and imshow?
|imshow| has a number of default settings intended for displaying images, such as turning off the axes and locking the aspect ra...

environ 11 ans il y a | 2

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Making a splash Screen for my Gui program
Search for 'splash screen' on the MATLAB File Exchange, there are a number of entries that can do this for you. <http://www.m...

environ 11 ans il y a | 0

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Who is the smartest MATLAB programmer?
Who is the smartest MATLAB programmer? Examples: Input x = 'Is it Obama?' Output = 'Me!' Input x = 'Who ?' Ou...

plus de 11 ans il y a

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Test harnesses and reference models
First I would double check that you are using virtual vs non-virtual buses where appropriate. There's a good blog post here t...

presque 12 ans il y a | 0

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High CPU usage when matlab is idle on Linux
Have you rebooted your Linux machine since July 1? If not then that may be the problem. There was a bug with Linux that caused a...

presque 12 ans il y a | 4

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The Hitchhiker's Guide to MATLAB
Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

presque 12 ans il y a

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Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

presque 12 ans il y a

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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...

presque 12 ans il y a

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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...

presque 12 ans il y a

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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...

presque 12 ans il y a

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Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

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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...

presque 12 ans il y a

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

presque 12 ans il y a

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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...

presque 12 ans il y a

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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...

presque 12 ans il y a

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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...

presque 12 ans il y a

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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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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...

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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 ...

presque 12 ans il y a

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Is my wife right?
Regardless of input, output the string 'yes'.

presque 12 ans il y a

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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...

presque 12 ans il y a

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