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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...

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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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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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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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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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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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Matlab r2013a doesn't recognize any compiler in order to protect a model.
Hey, Have you check your simulink model configuration parameters? There is update since the later version and I think that d...

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How specify a location for Microsoft Visual C++ 2010 v10.0 in Simulink Toolchain
Previously I worked with Matlab R2011A (32bit) and MSVS C 2010 (32bit) as compiler, now I have to work with Matlab R2013B (32bit...

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How to print to console in S-Function Builder?
Hey, I work with Matlab R2011a and the command mexPrintf allows me to print comment into the matlab command window. I rece...

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Hit Crossing driven by a signal of type 'single'
Hey, indeed this block only accepts the type "double" for input. Is it an acceptable way for you to use the block "Data Type Co...

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Redifinition of mxArray: error C2371
I find solution, it happens because "simstruct.h" (the C s-function hearder) does not include the same headers when compiling in...

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Matlab slider pass value to event handler
OK, you're right is see my mistake: I worte "@{pippo...", but it's "{@pippo..." the correct syntax. I never used the addlis...

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How declare a variable only once in a matlab function block and then use the previous value the nex time the function is used?
Is it possible for you to have one more input and one more output? What I suggest is to do like the image below: <</matlab...

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Matlab slider pass value to event handler
Hi, If you want to pass parameter with your callback you can do like this: hListener = addlistener(hSlider,'Value','PostS...

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Hiding simulink model content with s-function
The .mex (or .mexw32) is a compiled file. You don't need to compile it into dll file. If you give to your third part your model...

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Using string parameters in S-Functions generated by the legacy code tool
Hi, I don't know if I'm going to answer well to your question. What I understand is that you want to keep in your s-function a ...

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How can I compile (C) variables used several time in Simulink as global?
Do you try to use "Goto" and "From" simulink blocks? You declare your variables in constant blocks once and you connect them ...

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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 ...

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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...

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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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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...

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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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Is it a number?
Determine if input is numeric. If it is,output is 1; if it is not, output is 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...

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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...

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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...

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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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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 ...

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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...

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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...

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