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Summing Digits within Text
Given a string with text and digits, add all the numbers together. Examples: Input str = '4 and 20 blackbirds baked in a...

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Pattern matching
Given a matrix, m-by-n, find all the rows that have the same "increase, decrease, or stay same" pattern going across the columns...

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Trimming Spaces
Given a string, remove all leading and trailing spaces (where space is defined as ASCII 32). Input a = ' singular value deco...

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Symbolic substitution in matrices
vpa(T03n) vpa(T0Hn) help vpa VPA Variable precision arithmetic. R = VPA(S) numerically evaluates each elemen...

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Which doors are open?
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...

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Return a list sorted by number of occurrences
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 ...

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A Problem with bar3 Function
Are you trying to make 3 independent graphs on the same figure? Are you familiar with subplot()? That would give you mo...

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Estimate the minimum point given any function
FMINBND Single-variable bounded nonlinear function minimization. X = FMINBND(FUN,x1,x2) attempts to find a local minimizer X...

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Name for this practice: c = x.^2
"Element-wise power" <http://www.mathworks.com/help/matlab/ref/power.html> Also, "Element-wise multiplication" http://w...

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

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Anyone integrated photovoltaic generation system to the grid in matlab 2013a.
If you have SimPowerSystems: <http://www.mathworks.com/matlabcentral/fileexchange/34752-grid-connected-pv-array>

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How can I derive partitions of data sets in for loop
Creating arrays with the number in the name is considered bad programming practice, so instead of fixing your code, most people ...

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Elapsed Time
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, ...

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Balanced number
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...

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How to browse a Solar cell into your Simulink model Matlab 2013a
<https://www.mathworks.com/store/productselection.do> <http://www.mathworks.com/products/simelectronics/>

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

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Bottles of beer
Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...

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lsqcurvefit - problem with number of iterations
1) As a first try, I'd recommend scaling your x0, so they are all similar order of magnitude when passed into lsqcurvefit(). ...

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

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Remove Operations in a Vector
real(x)

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Implement simple rotation cypher
If given a letter from the set: [abc...xyz] and a shift, implement a shift cypher. Example: 'abc' with a shi...

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Choose the best fitting dominoes
You will be given a cell array of nx2 matrices. Choose one row from each matrix. These are the ordered pairs that will be plac...

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Need help with central difference method..
Perhaps you mean: plot(x_2,df,'LineWidth',1,'MarkerSize',100) instead of: plot(x_2,df(i-1),'LineWidth',1,'MarkerSi...

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Find best domino orientation
Given a list of pairs, find the orientation they should be placed in a line, such that the sum of the absolute values of the dif...

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Rotate and display numbered tile
Imagine a square tile with four numbers on it, one on each edge. We will call these edges north, east, south, and west. If th...

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Find best placement for ordered dominoes (harder)
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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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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Stuff the Board
You have a stack of tiles to put onto an array-like playing board. Each tile has a number (always an integer), and the board var...

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Scoring for oriented dominoes
Given a list of ordered pairs, and the order they should be placed in a line, find the sum of the absolute values of the differe...

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

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