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Cell joiner
You are given a cell array of strings and a string delimiter. You need to produce one string which is composed of each string fr...

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Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

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Combining excel files in a single file
You could do something like that (not tested): nRows = .. you define it. nCols = 1000 ; buffer = zeros(nRows, nCols) ;...

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Form a matrix from a structure
If it is a cell array and cells contents have matching sizes: >> doc cell2mat

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Looping over folders, skipping a folder if a file is present
EDIT: jump to the solution provided by Image Analyst, it is better. You should use |fullfile()| for building |subdirpath|. No...

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Create sparse matrix with zig-zag diagonal
You could use |sparse()|, building appropriate vectors of indices and values, e.g.: nCol = size(A, 2) ; nRow = nCol * size...

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[DISCONTINUED] MATLAB Answers Wish-list #2 (and bug reports)
Another feature that I would really appreciate is a _select_ instead of the _checkbox_ "Email me when answers are added to this ...

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Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

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Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

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Is there a built-in way to build a GET url in Matlab from a set of parameters?
If you just want to build a string from multiple components, you can use |sprintf|, e.g. >> v = 3 ; >> subfolder = 'WWW' ;...

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How do I create orthogonal basis based on two "almost" perpendicular vectors?
If you have no preference about which component to modify, you could perform something as simple as >> Z(end) = -Z(1:2)*Y(1:...

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How to extract data from a srting?
Solution with a regexp: regexp(s, '(?<=associate:).*(?=Start)', 'match') where |s| contains your string. EDIT: the fol...

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Find perfect placement of non-rotating dominoes (easier)
Given a list of ordered pairs, find the order they should be placed in a line, such that the sum of the absolute values of the d...

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

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Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

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Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

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Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

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

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Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

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Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

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Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

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[DISCONTINUED] MATLAB Answers Wish-list #2 (and bug reports)
As mentioned <http://www.mathworks.com/matlabcentral/answers/59216-discussion-about-answers-votes here>, I think that having the...

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[DISCONTINUED] MATLAB Answers Wish-list #2 (and bug reports)
I think that if people were reminded (e.g. weekly) on a verified email that they have to come back to "close" their threads (or ...

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how to make fscanf faster
15 years ago, I would use |fread| and "format" the data myself. I don't know how the technology evolved, but my guess is that |f...

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Finding the index value corresponding to a value closest to 0 in an array
You have several options. The first question is: do you really need the index, or could you use a vector of logicals, e.g. for i...

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repeat a loop for 10 times
Your for loop statement is not built correctly: for iterations=10 will just give |iterations| the value 10 and will execu...

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replace nan values with the mean of other cell array
You could build a solution based on the following: % -- Build a lookup table that associates to each JDay the mean of data ...

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i need to convert a cell with different datatype to a matrix please any one help me to do this
If you always have this structure with a numeric array first and then cell arrays, and if the second part of my comment above is...

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How can I save data to a CSV file in the format I want?
You cannot access a file in column. You have several options for achieving what you want, that will in principle all have the sa...

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grouping elements of a column that correspond to specific elements from another column
I would go for something like that: >> cName = 'MN' ; >> flagCountry = cellfun(@(cntry)strcmp(cntry, cName), out1(:,1)) ; ...

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