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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...

8年以上前

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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年以上前

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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...

8年以上前

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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年以上前

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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...

8年以上前

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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...

8年以上前

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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...

8年以上前

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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...

8年以上前

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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年以上前

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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...

8年以上前

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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. Examp...

8年以上前

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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 ...

8年以上前

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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年以上前

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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 ...

8年以上前

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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...

8年以上前

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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...

8年以上前

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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.

8年以上前

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

8年以上前

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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年以上前

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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年以上前

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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:...

8年以上前

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how can i vectorize this for loop?
You could do: n1 = numel(1:0.5:10); n2 = numel(1:0.5:5); numpl2 = repelem(1:0.5:10,n2)'; denpl2 = repmat([ones(n...

8年以上前 | 0

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Plotting selected data from time series
If you want to plot the time versus the min temperature and the time versus the max temperature and if your min temperature is o...

8年以上前 | 2

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質問

Get the line number of the last warning found ?
Is it possible to get the line number of the last warning found in order to store it and use it afterwards? As long as the |...

8年以上前 | 1 件の回答 | 0

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dataset expansion keeping same values
To transform |myArray| by repeating its elements |nRepeat| times: myArray = 100*rand(1,144); % fake data nRepeat = 10; ...

8年以上前 | 0

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plot a graph with two axis
You can do like this, using |yyaxis|: % fake data generation: myMatrix = [(1.2-(-0.4))*rand(20,2)+(-0.4) , sort((90-80)*...

8年以上前 | 0

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How to compare a series of 50 values to a single value for each sample in a plot?
I don't know if you have your data in structure arrays, vectors or others, but is this example similar to what you want to achie...

8年以上前 | 0

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When printing mfile, how to change format (font, header)?
In the Editor menu, you can change the headers properties and the font in Page setup: <</matlabcentral/answers/uploaded_files...

8年以上前 | 2

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How can I store the values in a matrix while using for loop?
You have to give the position where you want to write, like this: k = 1.5:0.1:3; ws = zeros(1,length(k)); dof = zeros...

8年以上前 | 0

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I have this error msg (Matrix index is out of range for deletion. Error in tray1 (line 31) x1(:,rows) = []; ) what is the problem ????
You are deleting columns of your matrix |x1| in the loop, so its size has changed (moreover, you skip some columns). To avoi...

8年以上前 | 0

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