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I'm a postdoctoral physicist at Oxford University.

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3 years ago

Given a vector x, return a vector y of the unique values in x sorted by the number of occurrences in x. Ties are resolved by a ...

Solve this!

27 days ago

There are n doors in an alley. Initially they are all shut. You have been tasked to go down the alley n times, and open/shut the...

Find the mean of each consecutive pair of numbers in the input row vector. For example, x=[1 2 3] ----> y = [1.5 2.5] x=[1...

12 months ago

Create a row array from 9 to 1, using the double colon operator.

Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

Given a Fahrenheit value F, convert to a Celsius value C. While the equation is C = 5/9 * (F - 32), as an exercise use two state...

Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

you just measured its surface area, that is the input.

1 year ago

Given a "counting sequence" vector x, construct the original sequence y. A counting sequence is formed by "counting" the entrie...

Given an amount of currency, return a vector of this form: [100 50 20 10 5 2 1 0.5 0.25 0.1 0.05 0.01] Example: Input a = ...

Add the numbers given in the cell array of strings. The strings represent amounts of money using this notation: $99,999.99. E...

Remove all the redundant elements in a vector, but keep the first occurrence of each value in its original location. So if a =...

Given two date strings d1 and d2 of the form yyyy/mm/dd HH:MM:SS (assume hours HH is in 24 hour mode), determine how much time, ...

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...

given a number x, return y, which is x - 12

Given a vector of lengths [a b c], determines whether a triangle with those sides lengths is a right triangle: <http://en.wikipe...

Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

Given a circle's radius, compute the circle's area. Use the built-in mathematical constant pi.

Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...

Given a positive integer find whether it is a balanced number. For a balanced number the sum of first half of digits is equal to...

Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

Given a string s1, find all occurrences of the single quote character and replace them with two occurrences of the single quote ...

A pangram, or holoalphabetic sentence, is a sentence using every letter of the alphabet at least once. Example: Input s ...

Given a positive, scalar integer n, create a (2^n)-by-n double-precision matrix containing the binary numbers from 0 through 2^n...

Write a function that accepts a cell array of strings and returns another cell array of strings *with only the duplicates* retai...

Remove all the consonants in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill'; Output s2 is 'a ...

Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

If the input string s is a word like 'hello', then the output word product p is a number based on the correspondence a=1, b=2, ....

Given an integer n >= 0, generate the length n+1 row vector representing the n-th row of <http://en.wikipedia.org/wiki/Pascals_t...

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