# Karl Ezra Pilario

### University of the Philippines - Diliman

Assistant Professor, University of the Philippines - Diliman, Department of Chemical Engineering. Research Interests: process data analytics, process systems engineering, machine learning.

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Draw matrix 'Swiss flag'( Euro 2020)

Draw a x-by-x matrix 'Swiss flag' using '0' and '1'.(x is odd and bigger than 4) Example x=5 ...

1 month ago

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Draw a x-by-x matrix British flag (Euro 2020)

Draw a x-by-x matrix 'British flag' using '0' and '1'.(x is odd and bigger than 4) x = 5 answer = [0 0 1 0 0 ...

1 month ago

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remove numbers from a string

check the given string for any numbers.in case one is found,remove it.but the two portions should be separated. if more than one...

1 month ago

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Draw a x-by-x matrix 'Denmark flag'(Euro(2020)

Draw a x-by-x matrix 'Denmark flag' using '4' and '1'.(x is odd and bigger than 4) Number 4: Caption S.Kjær and number 1: K.S...

1 month ago

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Matrix Indexing

Given a matrix A and scalars r,c,i, find the product of two elements, with the first element located at row r and column c (doub...

1 month ago

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balance vector

Given a non-empty vector x with integer elements. x shall be called balance vector if one can split the elements of x into two g...

1 month ago

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Map all the indices of an Array Indices into a Vector giving Index vs Row and Column

Create an array of the row and column values for the indices of an array. This is typically performed using [r c]=ind2sub(siz...

1 month ago

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Find the missing numbers.

Total *N* numbers are in the series of natural numbers ( *1,2,3,...,N* ). The input is an array (unsorted) of those natural num...

1 month ago

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The other half of the Fibonacci sequence

The <http://mathworld.wolfram.com/FibonacciNumber.html "Fibonacci sequence"> — F = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144,...

1 month ago

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The twelve days of Christmas

Traditionally there are twelve days of Christmas to celebrate ("Twelvetide"), typically starting with Christmas Day (25 December...

1 month ago

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short or buy ? take the opportunity

you had already calculated a theoretical stock value, now you checked in bloomberg the quoted price of that stock and you have t...

1 month ago

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Counting Squares

An algorithm starts with a single square and on each of its next iterations adds new squares all around the outside as shown bel...

1 month ago

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Calculate time taken by light to reach earth surface

We know the time(seconds) taken by light to reach surface of earth. What if the distance varies yearly or source of light moves ...

1 month ago

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Say type of roots in quadratic equation

Given the coefficients of a quadratic equation, write a function that gives the output y='RealDifferent' if the roots are real a...

1 month ago

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Alternating 1´s and 0´s in a matrix

Given an odd number n, write a function that creates a matrix y with dimension nxn alternating 1's and 0's, and starting with 1 ...

1 month ago

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Get the mean digit

Write a function that gives the mean digit (round towards nearest integer) of an input and positive number. For example: x ...

1 month ago

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Alternate list of elements

Write a function that combines two lists by alternating the elements, e.g. ['a','b','c'], ['1','2','3'] → 'a1b2c3'.

1 month ago

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Find argmax of a function

You are given vectors x and y (=f(x)). Return the element of x for which f(x) is maximized.

1 month ago

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Calculate the volume of a cone

Calculate the volume of a cone given an array containing one column of radii and one column of the height of the cone. * Reme...

1 month ago

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Find The Difference

Vector x is given.calculate the difference between the biggest and the smallest number that we can create from elements of x. f...

1 month ago

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Distance Between Points

Being n the number of points (If n = 3 there would be 3 points: A, B and C). The distance between each pair of points increases...

1 month ago

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Find the area of a triangle having vertices (A,B), (C,D), and (E,F)

Find the area of a triangle using if we have the three vertices of the triangle

1 month ago

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Hoax Numbers

A Hoax Number (OEIS A019506) is defined as a composite number, whose sum of digits is equal to the sum of digits of its distinct...

1 month ago