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Unable to perform assignment because the indices on the left side are not compatible with the size of the right side - Jacobi method inverse calculation
Function errnorm(vec) has inconsistent size. Try the following modifications: function [abserr] =errnorm(vec) vec = abs(ve...

6年以上前 | 1

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Undefined function 'abs' for input arguments of type 'cell'.
It is saying A is a cell type. In order to check it, run the following code: class(A) If this is the case, the following shoul...

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Rewrite for loop with find function
The function find returns the indeces according to the condition. So, in order to diplay the values, you might use the following...

6年以上前 | 1

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How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for.

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Determine if input is a perfect number
A <http://en.wikipedia.org/wiki/Perfect_number/ perfect number> occurs whent the sum of all divisors of a positive integer, exce...

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Is it an Armstrong number?
An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. Fo...

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First N Perfect Squares
*Description* Return the first N perfect squares *Example* input = 4; output = [ 1 4 9 16 ];

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Project Euler: Problem 1, Multiples of 3 and 5
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

6年以上前

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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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Vector creation
Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

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Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

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Create a vector
Create a vector from 0 to n by intervals of 2.

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Flip the vector from right to left
Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

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Whether the input is vector?
Given the input x, return 1 if x is vector or else 0.

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Find max
Find the maximum value of a given vector or matrix.

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Get the length of a given vector
Given a vector x, the output y should equal the length of x.

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Inner product of two vectors
Find the inner product of two vectors.

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Arrange Vector in descending order
If x=[0,3,4,2,1] then y=[4,3,2,1,0]

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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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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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Accessing data variables from another function
I did not get the final goal, but I fixed your code. F2([1,1,1 ; 2 2 2 ; 3 3 3]) function [Q,R] = F1(A) Q = 2*A R ...

6年以上前 | 1

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I need a code to count how many raw in my matrix above zero?
You might use the function find (https://www.mathworks.com/help/matlab/ref/find.html). Check the following code: B = [1,-1; 2,...

6年以上前 | 0

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Index exceeds the number of array elements (2)
Hi Ali, Your dsolve function has 4 states variables: dx(1,1), dx(2,1), dx(3,1), and dx(4,1). Therefore you need an initial vari...

6年以上前 | 1

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How to define limit of quiver axis?
You could use axis function. For more information check here: https://www.mathworks.com/help/matlab/ref/axis.html See the follo...

6年以上前 | 3

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Multiply 2 numbers
Very easy, you just have to multiply 2 numbers but you cannot use the following signs (*, /, - ,^) ,mtimes , times, cross, pro...

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Angle between Two Vectors
The dot product relationship, a dot b = | a | | b | cos(theta), can be used to determine the acute angle between vector a and ve...

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Is the Point in a Circle?
Check whether a point or multiple points is/are in a circle centered at point (x0, y0) with radius r. Points = [x, y]; c...

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Calculate the area of a triangle between three points
Calculate the area of a triangle between three points: P1(X1,Y1) P2(X2,Y2) P3(X3,Y3) these three points are the vert...

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Angle between two vectors
You have two vectors , determine the angle between these two vectors For example: u = [0 0 1]; v = [1 0 0]; The a...

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Right and wrong
Given a vector of lengths [a b c], determines whether a triangle with those sides lengths is a right triangle: <http://en.wikipe...

6年以上前