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

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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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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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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...

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

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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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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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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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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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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 ...

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

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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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Add two numbers
Given a and b, return the sum a+b in c.

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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...

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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:...

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Opening and writing into doc file
You will need to create a MATLAB COM object to be able to achieve this. See: <http://www.mathworks.co.uk/help/techdoc/mat...

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How to copy copy column with loop?
Using 'repmat' is also a possibility: A = [ 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8] out = [...

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Why "Model arguments can not be used in non-tunable expressions"? in Referenced Simulink Models?
It would appear as if you are indexing the parameter 'mfgz' based on model parameters. Indexing of this form is not allowed if y...

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rose diagram
The workaround I use to get the correct limits set on a polar plot is to simply draw a circle at your desired maximum, and set t...

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structuring element
See: doc zeros doc ones You can then add/subtract or reallocate these arrays to get what you need.

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How to display risetime of output response of my system in simulink?
Not entirely sure why you'd want to do this. But it is definitely possible - you should be able to do it with a combination of s...

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Log log plot
See: doc loglog

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How to draw a bar graph from cell array with different size length?
If you are going to pad out your arrays with zeros you don't even need to define it as a cell array, just use a matrix. Try t...

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How to check existence of worksheet in excel file
[A,B] = xlsfinfo('foofoo.xlsx'); sheetValid = any(strcmp(B, 'foo2'));

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problem of memory
Also ensure that if you are generating Matlab Figures (as an intermediate step) with the 'Visible' property set to false that yo...

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how to load .mat in GUI every time the GUI runs and the GUI connect to simulink model
You call add a call to load('alphabet.mat') within the Simulink model's InitFcn callback if the parameters are only needed by th...

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