Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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 ...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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 ...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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

mer än 7 år ago

Solved

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

mer än 7 år ago

Solved

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

mer än 7 år ago

Solved

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 ...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

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:...

mer än 7 år ago

Answered
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...

mer än 7 år ago | 0

| accepted

Answered
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...

mer än 7 år ago | 2

| accepted

Question

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 |...

mer än 7 år ago | 1 answer | 0

1

answer

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

mer än 7 år ago | 0

| accepted

Answered
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)*...

mer än 7 år ago | 0

| accepted

Answered
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...

mer än 7 år ago | 0

Answered
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...

mer än 7 år ago | 2

| accepted

Answered
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...

mer än 7 år ago | 0

Answered
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...

mer än 7 år ago | 0

| accepted