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# Michelangelo Ricciulli

79 total contributions since 2016

Ph.D. in Information Technologies

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Subscripted assignment dimension mismatch.Error in fnc (line 12) matrix1(1,1)=cos(k*delta_z);matrix1(1,2)=(i/q)*sin(k*delta_z);
Hi, Before answering the question, I want to give you a couple of suggestions. First, try to post your code in better format...

environ un an ago | 0

| accepted

How to generate a joint probability matrix from a data matrix
Hi, A simple way to get the joint probability matrix for two dimension is using the hist3 function, (read the documentation <ht...

plus d'un an ago | 0

| accepted

Graph of function not match y(variable)
Hi Gabriel, you are mixing up the indexes of the vector and the argument of a mathematical function. y(10) means the 10th value...

plus d'un an ago | 0

| accepted

How can I show variable index in a for loop?
Hi there, a quick and dirty method could be using the eval function. First you define the variable name var=['x' num2str(...

plus d'un an ago | 0

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Polarisation
You have n polarising filters stacked one on top of another, and you know each axis angle. How much light gets passed through th...

plus d'un an ago

Solved

Missing five
Convert decimal numbers to a base-9 notation missing the digit *5* <<http://www.alfnie.com/software/missing5.jpg>> Too man...

plus d'un an ago

Solved

Circle/Pentagon Overlap
Your function will be provided with the five vertices of a pentagon (p) as well as the center point (cp) and radius (r) of a cir...

plus d'un an ago

Solved

Recaman Sequence - II
Take an arbitrary starting point as input and create Recaman Sequence. Then find the 1, return its index. For example: if n =...

plus d'un an ago

Solved

Recaman Sequence - I
Recaman Sequence (A005132 - <http://oeis.org/A005132 - OEIS Link>) is defined as follow; seq(0) = 0; for n > 0, seq(n) ...

plus d'un an ago

Solved

Write c^3 as sum of two squares a^2+b^2
write c^3 as sum of two squares a^2+b^2. a and b must be integer and greater than zero. For example 5^3 = 2^2 + 11^2 5...

plus d'un an ago

Solved

Predicting life and death of a memory-less light bulb
*&#128161 &#128161 &#128161 &#128161 &#128161 &#128161 &#128161 &#128161 &#128161 &#128161 &#128161 &#128161 &#128161 &#128161 &...

plus d'un an ago

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Pi Digit Probability
Assume that the next digit of pi constant is determined by the historical digit distribution. What is the probability of next di...

plus d'un an ago

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The Glass Half Full
Identical glasses are placed in a triangular tower structure, such that the top level (L = 1) comprises one glass, the next leve...

plus d'un an ago

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Is it really a 5?
A number containing at least one five will be passed to your function, which must return true or false depending upon whether th...

plus d'un an ago

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Write a function to provide a yes or no answer to the input string. However, it must plead the 5th amendment (return an empty st...

plus d'un an ago

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Spot the First Occurrence of 5
This problem series invites you to solve two simple problems related to the integer NUMBER FIVE, in order to celebrate <https://...

plus d'un an ago

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Octoberfest festival
A group of students decided to visit Octoberfest festival. First they ordered one beer, then after half-hour they taken one more...

plus d'un an ago

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A Simple Tide Gauge with MATLAB
*&#8767 &#8767 &#8767 &#8767 &#8767 &#8767 &#8767 &#8767* You are standing in a few inches of sea water on a beach. You a...

plus d'un an ago

Solved

Find the nearest prime number
Happy 5th birthday, Cody! Since 5 is a prime number, let's have some fun looking for other prime numbers. Given a positive in...

plus d'un an ago

Problem Writing an Autoregressive Process Function
Hello Roger, First I suppose the length N, is the output vector length. Right? Let's say your initial index is 1. Thus, samp...

plus d'un an ago | 0

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Van Eck's Sequence's nth member
Return the Van Eck's Sequence's nth member. For detailed info : <http://oeis.org/A181391 OEIS link> and <https://www.theguard...

plus d'un an ago

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5 Prime Numbers
Your function will be given lower and upper integer bounds. Your task is to return a vector containing the first five prime numb...

plus d'un an ago

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Is this is a Tic Tac Toe X Win?
For the game of <https://en.wikipedia.org/wiki/Tic-tac-toe Tic Tac Toe> we will be storing the state of the game in a matrix M. ...

plus d'un an ago

Solved

Extra safe primes
Did you know that the number 5 is the first safe prime? A safe prime is a prime number that can be expressed as 2p+1, where p is...

plus d'un an ago

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Basic electricity in a dry situation
&#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#...

plus d'un an ago

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Pentagonal Numbers
Your function will receive a lower and upper bound. It should return all pentagonal numbers within that inclusive range in ascen...

plus d'un an ago

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Pernicious Anniversary Problem
Since Cody is 5 years old, it's pernicious. <http://rosettacode.org/wiki/Pernicious_numbers Pernicious number> is an integer whi...

plus d'un an ago

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Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
Submit your answer to this problem a multiple of 5 seconds after the hour. Your answer is irrelevant; the only thing that matte...

plus d'un an ago

Solved

Energy of a photon
Given the frequency F of a photon in giga hertz. Find energy E of this photon in giga electron volts. Assume h, Planck's ...

plus d'un an ago

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How to subtract?
* Imagine you need to subtract one number from another using MATLAB. * You will not be using eval for this task. * Given two A...

plus d'un an ago