Answered
How to plot sine graph by using for loop?
You don't need a loop, just: theta = 0:0.1:2*pi; plot(theta,sin(theta))

6 years ago | 1

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Answered
Result producing 1x5 array instead of 10x5?
You need to specify the index: n = 10; result = zeros(n,5); for k=1:n; A0=1;P0=29;g=rand;p=rand;B=rand; result(k,:) = [A0,P...

6 years ago | 1

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Answered
Given a matrix "A", how to create a row vector of 1s that has the same number of elements as "A" has rows?
I think the goal of this forum is not to do anyone's homework, but to solve generic questions about Matlab that can help more us...

6 years ago | 7

Answered
Not enough input arguments?
In this line: broyden(x,F,7,0.001); you are calling the function F without inputs!

6 years ago | 0

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Error for mismatched delimiters in relative long equation.
I guess you are missing a product(*) eqn = ((xr(1-q))/k - r(1- (x(1-q))/k)-1)*((log(xq+1))-q*q/c) + ((r(1-(x(1-q))/k)+1)*((1-q)...

6 years ago | 1

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Answered
combine two Matrix in one column
L = [reshape(A',[numel(A),1]);reshape(B',[numel(B),1])]

6 years ago | 1

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Answered
Averaging values in column 2 if column 1 falls within a certain range
Try this (just changing by your real B): n = 1:60; B = rand(1000,2); B(:,1) = linspace(1,60,1000); means = arrayfun(@(i) m...

6 years ago | 0

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Solved

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 + ...

6 years ago

Solved

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...

6 years ago

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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 ...

6 years ago

Solved

Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

6 years ago

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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...

6 years ago

Solved

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...

6 years ago

Solved

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...

6 years ago

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

6 years ago

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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...

6 years ago

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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...

6 years ago

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Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

6 years ago

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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 ...

6 years ago

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Remove the two elements next to NaN value
The aim is to *remove the two elements next to NaN values* inside a vector. For example: x = [6 10 5 8 9 NaN 23 9 7 3 21 ...

6 years ago

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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:...

6 years ago

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Extract leading non-zero digit
<http://en.wikipedia.org/wiki/Benford%27s_law Benford's Law> states that the distribution of leading digits is not random. This...

6 years ago

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Make a Palindrome Number
Some numbers like 323 are palindromes. Other numbers like 124 are not. But look what happens when we add that number to a revers...

6 years ago

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Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

6 years ago

Solved

Flip the main diagonal of a matrix
Given a n x n matrix, M, flip its main diagonal. Example: >> M=magic(5); >> flipDiagonal(M) 9 24 1 ...

6 years ago

Solved

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

6 years ago

Answered
Consider a signal ?[?] = (0.2)??[?]. plot the magnitude, angle, real and imaginary parts of ?(???). Plot ?(???) at 101 101 equispaced points between 0 and ?. help me to find error in subplot command. all four items are not plotted.
Your problem is due to bad programming practices. I recommend to put each instruction in a separate line. If you do that your sc...

6 years ago | 0

Answered
How to change this function fun = @(x)x(1)*exp(-norm(x)^2) to x^2+y^2?
fun = @(x) (x(1)^2 + x(2)^2) %x(1) is x and x(2) is y %or fun = @(x,y) (x^2 + y^2)

6 years ago | 0

Answered
How can I append same size matrix vertically?
sample = [12 62; 93 -8; -1, 11]; sample2 = [10 60; 90 0; 0, 10]; new = [sample; sample2];

6 years ago | 1

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Answered
Sum of rows in a defined rhythm
A(1:5*270,1)=1; B(1:270,1) = sum(A(270:270:end,1))

6 years ago | 0

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