# Andrew Newell

A geophysicist who uses MATLAB for most of his modeling.

Professional Interests: geophysics

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**Content Feed**

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...

3 months 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...

7 months 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 +...

8 months 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...

8 months ago

Solved

Lost days

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

8 months ago

Solved

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...

8 months 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...

8 months ago

Solved

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...

8 months ago

Solved

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 ...

8 months 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...

8 months ago

Solved

Count the days

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

8 months ago

Solved

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...

8 months 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 ...

8 months 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...

8 months 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...

8 months 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

8 months 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)* ...

8 months 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;...

8 months ago

Solved

Calculate the average value of the elements in the array

Calculate the average value of the elements in the array

8 months ago

Solved

the average value of the elements

Calculate the average value of the elements in the array

8 months ago