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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))

約14年前 | 3

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"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

約14年前 | 2

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

約14年前 | 0

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

約14年前 | 1

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computes days of the week
help weekday doc weekday

約14年前 | 0

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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年以上前

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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年以上前

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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年以上前

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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年以上前

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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年以上前

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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年以上前

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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年以上前

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

14年以上前 | 0

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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...

14年以上前 | 0

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

14年以上前 | 0

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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...

14年以上前 | 0

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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.

14年以上前

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

14年以上前

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

14年以上前 | 0

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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...

14年以上前 | 0

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

14年以上前

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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...

14年以上前

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

14年以上前

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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...

14年以上前

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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...

14年以上前

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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...

14年以上前

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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 ...

14年以上前

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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...

14年以上前

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

14年以上前

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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...

14年以上前