Nikolaos Nikolaou

Last seen: Today

2,540 total contributions since 2015

I can derail any conversation to the time i first had an olive :)

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combine cells
A cell type variable is created. However it has other cells in itself. we want to integrate them all in a single cell. the conte...

22 hours ago

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Low level NaN
* I have a dataset. Columns represents different variables. * A variable may start with NaN or any double type number. * If i...

22 hours ago

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replace nan values iteratively.
replace nan values with the average of two neighbour non-nan value iteratively as follow; x = [2; 4; 6; nan; nan; nan; 10]; ...

22 hours ago

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Delete the rows in the middle
We will delete the rows in the middle and keep the first and the last rows. For example if input is [1 2 1 7 1 8 ...

23 hours ago

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Calculate trends in time series
Create a new variable that has trends in input series. If _t+1_ is bigger than or equal to _t_, than trend in _t_ will be 1, oth...

23 hours ago

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Calculate Simple Intrest for given data
P,N,R stands for Principle amount, No. of years and rate of intrest resp. Calculate intrest I

23 hours ago

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Best Problem Elections
When I am writing those words, there are 2002 problems on Cody. Many of them are simply wonderful. Do you remember which of them...

23 hours ago

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pay it forward
Choose a number (integer between 0 and 65535) You will pass this problem if you are the *second* person to choose that same n...

23 hours ago

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unique with nan
input x = [2 NaN 3 5 NaN; 1 NaN 4 9 NaN; 8 -2 7 6 -2; 7 4 8 5 4]; output y_correct = [2 ...

1 day ago

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Fill the matrix - 1
Input is a column vector and n. n columns will be added to the left of the input column. The first value of the row is the s...

1 day ago

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Go back n times
You will be given a column vector (such as x = [1; 2; 3; 4; 5; 6]). If (n=3) you will return following; [ 1 NaN NaN NaN ...

2 days ago

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Double Factorial
Return double factorial n(n-2)...(5)(3)(1), n>0, odd n!! = n(n-2)...(6)(4)(2), n>0, even 1 ...

2 days ago

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Polybius Square
Given a string, calculate the coordinates. Input will be always in lowercase. If string is a sentence then use 0 (zero) to indic...

2 days ago

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Bridge and Torch Problem - Minimum time
<https://en.wikipedia.org/wiki/Bridge_and_torch_problem Details of the problem ...> Input is crossing time list. (for exampl...

2 days ago

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Calculate the h-index
H-index is a powerful tool for quantifying the scientific contribution of a researcher. H-index is defined as follows (source - ...

2 days ago

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Seperate 2nd column in a matrix

2 days ago

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Find the value of Y

3 days ago

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Electro-static Force

3 days ago

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Raise Matrix to Power
For a given square matrix x and scalar a, find x^a without using '^' or 'mpower'.

3 days ago

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Half the length of the vector

4 days ago

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PRIME GENERATOR

4 days ago

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size

4 days ago

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area

4 days ago

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Procrustean bed
Given a vector x and an integer n, convert x to a vector of length n by (1) chopping off the end if it is too long, or (2) addin...

5 days ago

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Inequalities

5 days ago

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Sudoku

5 days ago

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Diagonal Prod

5 days ago

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Sort accordingly

5 days ago

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Sum of all the divisors of n

5 days ago

Solved

List the emirps

6 days ago

Nikolaos Nikolaou

Last seen: Today

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