Solved

I've got the power! (Inspired by Project Euler problem 29)
Consider all integer combinations of a^b and b^a for the integer values 2 ≤ a ≤ 4 and 2 ≤ b ≤ 5: 2^2=4, 2^3=8, 2^4=16,...

13 years ago

Solved

Renaming a field in a structure array
MATLAB has a <http://www.mathworks.com/help/techdoc/ref/setfield.html setfield> and a <http://www.mathworks.com/help/techdoc/ref...

13 years ago

Solved

When can one be the Life Member of the IEEE?
Consult the site http://en.wikipedia.org/wiki/Ieee from where it can be seen that IEEE Members who have reached the age of 65 an...

13 years ago

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Decoding : Find the value
'u' in the function below is of type char or string and 'v' is of type int or double. function y = your_fcn_name( u, v) ...

13 years ago

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It dseon't mettar waht oedrr the lrettes in a wrod are.
An internet meme from 2003 (read more <http://www.snopes.com/language/apocryph/cambridge.asp here>) asserted that readers are re...

13 years ago

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Convert Hard Drive marketing sizes to actual data sizes
Hard drive sizes are typically marketed using the decimal meaning of prefixes, whereas RAM uses binary meanings. For example: ...

13 years ago

Solved

Overwrite/Re-defination PROBLEM
>> M = magic(3) M = 8 1 6 3 5 7 4 9 2 >> result = -det(M) result = 36...

13 years ago

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Grandpa's telescope
Two grandkids Dorothy and Benjamin are sharing a telescope made by their grandpa, who used an old lens of spectacles as the obje...

13 years ago

Solved

Cell Array Inception?
Jimmy is a beginning MATLAB student who is trying to read in a text file and build a cell array of strings, where A{k} is the kt...

13 years ago

Solved

Nonuniform quantizer as a piecewise constant function
Implement a nonuniform quantizer as the following piecewise function: y = -3.5, x < 3 y = -1.5, -3 ≤ x < -1 y = -...

13 years ago

Solved

Surface Fit z(x,y)
Given three vectors x,y,z. Find four coefficients c = [cxx cxy cyy c00], such that z = cxx*x.^2+cxy*x.*y+cyy*y.^2+c00. For e...

13 years ago

Solved

Four quadrant inverse tangent function.
Create a function that returns an array P the same size as X and Y containing the element-by-element, four-quadrant inverse tang...

13 years ago

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Output any real number that is neither positive nor negative
Output any real number that is neither positive nor negative

13 years ago

Solved

Who is the smartest MATLAB programmer?
Who is the smartest MATLAB programmer? Examples: Input x = 'Is it Obama?' Output = 'Me!' Input x = 'Who ?' Ou...

13 years ago

Solved

Find the biggest empty box
You are given a matrix that contains only ones and zeros. Think of the ones as columns in an otherwise empty floor plan. You wan...

13 years ago

Solved

Determine the number of odd integers in a vector
Determine the number of unique odd integers in a vector. Examples: Input x = [2 5 8 3 7 1]; Output y = 4; Inp...

13 years ago

Solved

Differential equations I
Given a function handle |f| an initial condition |y0| and a final time |tf|, solve numerically the differential equation dy...

13 years ago

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RMS value from a set of observations
Find rms value of a set of observations of a physical quantity? Hint: The observations are accessed in the form of vectors

13 years ago

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ranch area?
Your friend has a ranch with four distinct boundary lines. Three boundary lines are ideal straight roads: (1) North Club Road, (...

13 years ago

Solved

Flexible Anonymous Function
Given a function handle, return a handle to a function that would accept an arbitrary number of inputs, applies the function to ...

13 years ago

Solved

create a circulant matrix
create a circulant matrix

13 years ago

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Find: Faster Alternatives for Large Sorted/Unique Vectors
The Challenge is to create faster Find methods for large unique ascending vectors. Methods exist that are 1000 times faster t...

13 years ago

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How long is the longest prime diagonal?
Stanislaw Ulam once observed that if the counting numbers are <http://en.wikipedia.org/wiki/Ulam_spiral arranged in a spiral>, t...

13 years ago

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Given a window, how many subsets of a vector sum positive
Given a vector: [1 0 -1 3 2 -3 1] and a window of 2, A sliding window would find: 1 + 0 = 1 0 - 1 = -1 ...

13 years ago

Solved

Mean ignoring NaNs
Define a function that behaves in the same way as mean(x) and mean(x,d) except that it ignores NaNs (unless all of the values be...

13 years ago

Solved

DNA N-Gram Distribution
Given a string s and a number n, find the most frequently occurring n-gram in the string, where the n-grams can begin at any poi...

13 years ago

Solved

Create an 'arrow-head" matrix
Write a function that when given an odd number, produces an arrow-head function pointing to the right. Examples n = 3 ...

13 years ago

Solved

Two-output anonymous function?
Return a function handle that when applied to an input, it produces two outputs: the first is the same as the input, and the sec...

13 years ago

Solved

Phonebook-like problem
strcmpi('Yes', 'No')

13 years ago

Solved

Count up then down
Create a function that produces counting up from 0 up to n then down to 0 n=2 --> 0 1 2 1 0 n=3 --> ...

13 years ago