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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))

7年弱前 | 1

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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...

7年弱前 | 1

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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...

7年弱前 | 7

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

7年弱前 | 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)...

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

7年弱前 | 1

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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...

7年弱前 | 0

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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 + ...

7年弱前

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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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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...

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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...

7年弱前

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

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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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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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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...

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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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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 ...

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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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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...

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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...

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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...

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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 ...

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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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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...

7年弱前 | 0

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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)

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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];

7年弱前 | 1

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

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