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Christian


Last seen: ungefär 3 år ago |  Active since 2012

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Question


Read parquet file error
Hi, I'm reading parquet files and facing some problems. For comparison the file was read with python using fastparquet with no ...

mer än 3 år ago | 1 answer | 0

1

answer

Question


Insert timestamp with timezone in database
Hi, I'd like to insert (table) data into an Oracle database. The data contains datetime variables with timezone information whi...

mer än 3 år ago | 1 answer | 0

1

answer

Question


Is there a way to create a custom cvpartition?
Hi, I'd like you use crossvalidation in a model with a custom set of training/test sample vectors. To use some of the built-...

mer än 3 år ago | 3 answers | 0

3

answers

Solved


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

mer än 5 år ago

Solved


How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

nästan 11 år ago

Solved


Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

nästan 11 år ago

Solved


New Cody Time-Out Time
Determine the New Cody Time-Out Time Consume the Maximum Possible Time without Timing out. *Score:* 60 (sec) - Time (sec) ...

nästan 11 år ago

Solved


Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

nästan 11 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...

nästan 11 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...

nästan 11 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...

nästan 11 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...

nästan 11 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...

nästan 11 år ago

Solved


Right and wrong
Given a vector of lengths [a b c], determines whether a triangle with those sides lengths is a right triangle: <http://en.wikipe...

nästan 11 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...

nästan 11 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...

nästan 11 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...

nästan 11 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 ...

nästan 11 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 ...

nästan 11 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...

ungefär 12 år ago

Solved


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

ungefär 12 år ago

Solved


Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...

ungefär 12 år ago

Solved


Unique - Very Very Large Numbers
Given a vector column, with some very large numbers, create the ascending sort and unique vector. *Input:* A (column vector)...

ungefär 12 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:...

ungefär 12 år ago

Solved


Swap the input arguments
Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

ungefär 12 år ago

Submitted


csvexport
Export cellarrays to csv files

ungefär 12 år ago | 1 download |

Solved


Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

ungefär 12 år ago

Solved


surface of a spherical planet
you just discovered its circumference, that is the input.

ungefär 12 år ago

Solved


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...

ungefär 12 år ago

Solved


Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

ungefär 12 år ago

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