# Andrew Newell

A geophysicist who uses MATLAB for most of his modeling. Professional Interests: geophysics

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Solved

The Piggy Bank Problem

Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...

mer än 2 år ago

Solved

Lambert's W

Matlab cody does not support lambertw. Try to create a lambert's w function yourself. Lambert's W is the function that solves...

nästan 3 år ago

Solved

First use of arrayfun() and anonymous function @(x)

Create an anonymous function using @(x) for a parabola equation for the given coefficients stored in s with s(1)x2 + s(2)x +...

nästan 3 år ago

Solved

The End of the World

given a date -- represent it in the Maya long count system. <https://en.wikipedia.org/wiki/Maya_calendar> <https://maya.nm...

nästan 3 år ago

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Lost days

Given two dates in a particular format, calculate the difference between them.

nästan 3 år ago

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Leap Year

According to Gregorian Calender(which is in use now, in many countries),decide whether a given year is a leap year or not. Give...

nästan 3 år ago

Solved

Friday or not

I love Friday. Please tell me whether the day is Friday. Dateformat is 'yyyy-mm-dd' or 'dd-mmm-yyyy' or 'mm/dd/yyyy'. Exa...

nästan 3 år ago

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Find the day for a date

Today's day and date will be given to you. By utilising that you need to find the day of the old date. (Date will be in DD/MM/YY...

nästan 3 år ago

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Friday the 13th

According to superstition, lots of unpleasant stuff happens on Friday the 13th, so you might like to find the next occurence of ...

nästan 3 år ago

Solved

Day counter function

Write a function called _day_counter_ that returns the number of Mondays that fell on the first day of the month in a given year...

nästan 3 år ago

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Count the days

Count the occurrence of a particular day (e.g. Monday) in a given year.

nästan 3 år ago

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How long until the weekend?

Write a function a that takes a date vector as an input and returns the number of hours until the weekend begins. The beginning...

nästan 3 år ago

Solved

Days until next NewYear ball drop

Given a date string in the form 'yyyy-mm-dd' or 'yyyy-mm-dd hh:mm:ss', calculate the number of *days* until the dropping of the ...

nästan 3 år ago

How do I generate a random number with beta distribution?

You can use the function betarnd, but you'll need to do some normalizing to get it in the standard form used by MATLAB (see Beta...

nästan 3 år ago | 0

| accepted

Newton Raphson - saving all values and using last iteration value as initial for next

Sorry, I just realized that you wanted to save the iterations. Here's how: x = -0.001*ones(6,length(A1)); for i=1:5 x(i+1...

nästan 3 år ago | 0

| accepted

Newton Raphson - saving all values and using last iteration value as initial for next

O.k. So here is how you do it: x = -0.001*ones(size(A1)); for i=1:5 x = x - f(x)./fd(x); end

nästan 3 år ago | 0

Solved

Combinations without using nchoosek

You have to generate a matrix with all possible combinations of n elements *taken 2* at a time, *without using nchoosek(1:n,2)* ...

nästan 3 år ago

Solved

Rotate Matrix @180 degree

Rotate Matrix @180 degree Example A=[8 1 6; 3 5 7; 4 9 2], then answer would be [2 9 4;...

nästan 3 år ago

Solved

Calculate the average value of the elements in the array

Calculate the average value of the elements in the array

nästan 3 år ago

Solved

the average value of the elements

Calculate the average value of the elements in the array

nästan 3 år ago