Answered
find the 3 maximum elements and their index
r = rand(100,1); [val ind] = sort(r,'descend'); val(1:3) ind(1:3) r(ind(1:3))

14 years ago | 3

Answered
"real positive integers or logicals" error
do you have a variable named cos? whos cos If you do, you will want to clear it out. clear cos

14 years ago | 2

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Answered
Using Variable Contents to Create Variable names
eval([MyPG{i} '_' RtnType{x} '= [' MyPG{i} '_' RtnType{x} ',' num2str(MyMedian) '];'])

14 years ago | 0

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Answered
norm square
Have you tried CRE = norm(P)^2; help norm doc norm

14 years ago | 1

Answered
computes days of the week
help weekday doc weekday

14 years ago | 0

Solved

Make one big string out of two smaller strings
If you have two small strings, like 'a' and 'b', return them put together like 'ab'. 'a' and 'b' => 'ab' For extra ...

14 years ago

Solved

The Hitchhiker's Guide to MATLAB
Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

14 years ago

Solved

Omit columns averages from a matrix
Omit columns averages from a matrix. For example: A = 16 2 3 13 5 11 10 8 9 7 ...

14 years ago

Solved

Project Euler: Problem 1, Multiples of 3 and 5
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

14 years ago

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Sorted highest to lowest?
Return 1 if the input is sorted from highest to lowest, 0 if not. Example: 1:7 -> 0 [7 5 2] -> 1

14 years ago

Solved

Factorize THIS, buddy
List the prime factors for the input number, in decreasing order. List each factor only once, even if the factorization includes...

14 years ago

Solved

Is my wife right? Now with even more wrong husband
Again, as in "Is my wife right?" ( <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right> ), answer 'yes' r...

14 years ago

Answered
Please Speed UP This Algoritm!!!
B4 = reshape(permute(bsxfun(@tims,IN4,aaa),[3 1 2]),size(aaa,3),[]); B = sum(abs(B4).^2,2);

15 years ago | 0

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Answered
Matlab while loop/array help.
Mary, there is no need for a while loop. You can do this simply by excluding the value you and, and then taking the min. ex...

15 years ago | 0

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Answered
Unrepeated random numbers
L = length(S); k = 5; ind = randperm(L,k); S_rand = S(ind);

15 years ago | 0

Answered
Color scaling
What you'll want to do is make sure you use a constant color axis. This can be set by using the command caxis. help caxis...

15 years ago | 0

Solved

Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

15 years ago

Solved

Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

15 years ago

Answered
Plot 3D line object with alpha gradient
amap = linspace(1,0,size(p,1))'; set(mfig,'FaceColor','none','EdgeColor','flat',... 'LineWidth',3,'FaceVertexAlphaDat...

15 years ago | 0

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Answered
Geometric diagonal of a non-squared matrix
Ersilia, Assuming your image is a 2D matrix, you could take "the rectangular main diagonal" from it by using the following co...

15 years ago | 0

Solved

The Goldbach Conjecture
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

15 years ago

Solved

Sort a list of complex numbers based on far they are from the origin.
Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...

15 years ago

Solved

All capital?
Are all the letters in the input string capital letters? Examples: 'MNOP' -> 1 'MN0P' -> 0

15 years ago

Solved

Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

15 years ago

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Distance walked 1D
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...

15 years ago

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

15 years ago

Solved

Given an unsigned integer x, find the largest y by rearranging the bits in x
Given an unsigned integer x, find the largest y by rearranging the bits in x. Example: Input x = 10 Output y is 12 ...

15 years ago

Solved

How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

15 years ago

Solved

Is my wife right?
Regardless of input, output the string 'yes'.

15 years ago

Solved

Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

15 years ago