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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 13 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 13 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 13 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 13 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 13 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 13 år ago
Solved
Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...
mer än 13 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 13 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 13 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 13 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. Example...
mer än 13 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 13 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 13 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 13 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 13 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 13 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 13 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 13 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 13 år ago
Question
Conditionally Format Bar Chart
Is it possible to create a conditionally formatted bar chart? I have a time series bar chart that has positive and negative v...
mer än 13 år ago | 2 answers | 0
2
answersQuestion
String and cell compares?
I am having a problem with the below code. I have a field, "name" which I included a sample below. I am trying to do some contr...
mer än 13 år ago | 1 answer | 0
1
answerQuestion
Webinar - PDF?
For this webinar Algorithmic Trading : Simple Lead Lag EMA There was a PDF that had all of the code and a write up of the we...
nästan 14 år ago | 1 answer | 0
1
answerQuestion
Logical Indexing into 2d matrix
I am trying to use a logical vector to pull out all data from a 2d matrix. The data is below 67 75 52 44 2...
nästan 14 år ago | 1 answer | 0
1
answerQuestion
Control Break Processing
[EDIT: 20110720 16:05 CDT - reformat - WDR] I have 3 column vectors (Date1 Date2 and Error) and what I want to do is create the...
mer än 14 år ago | 2 answers | 0
2
answersSorting Cell stucture with different data types
This is what C looks like <3503x1 cell> <3503x1 double> <3503x1 cell> <3503x1 double> <3503x1 cell> <3503x1 double>...
mer än 14 år ago | 0
Sorting Cell stucture with different data types
Also, all of the string data are cell arrays. So this is a Cell Array in a Cell Array
mer än 14 år ago | 0
Question
Sorting Cell stucture with different data types
I have a cell structure with 32 columns of data I read in the data in a cell Structure C = textscan(fid,'%s%f%s%f%s%f%f%f%f%f...
mer än 14 år ago | 3 answers | 0
