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Bullseye Matrix
Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

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Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

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Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

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Need to read data from text format to matlab
I was able to reproduce your error as below: A = str2num('') % An empty character vector; Result: A = [] B = str2num([]) % An ...

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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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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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Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

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Find the Pattern 1

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Finding the shortest path
After you have found the minimum value of the function, you can simply replot over the same line in a different color. The most ...

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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.

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Calculate Amount of Cake Frosting
Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...

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Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

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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...

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

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

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Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; ...

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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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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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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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Réponse apportée
it says the right side does not equal to the left i dont know what should i do can anyone help me pls?
If the error says "Unable to perform assignment because the left and right sides have a different number of elements" the issue ...

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how to get matlab to disply zero as the last value
a,b, and h are 18x1 so you'll only get 18x1 unless you add a zero at the end. You can do that in a few ways: x(19)=0; %or x(...

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How can I plot coordinates up on a map?
You can use the hold command to plot two things to the same figure. imshow('map_image') hold on plot(points_of_interest_x,poi...

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Saving image in correct format or how do I save only image-part of the figure?
This answer by Adam Danz shows how you can remove the borders and interactive parts of the figure window. After you've done so,...

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Index exceeds the number of array elements(3)
The error Index exceeds the number of array elements (3). This means that you are asking for an element beyond the boundaries ...

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How to supply perticular varargin entries of the 'main_function(varargin)' to a 'subfunction(varargin_new)'?
Solution When you call the original function, you do so with original_function(arg1,arg2,arg3,arg4,..) Using varargin lets ...

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How to import a column from an Excel file?
Since it seems that you just need to get rid of the NaN values, try using logical indexing with the isnan command. p_time = p_t...

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Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

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Add two numbers
Given a and b, return the sum a+b in c.

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