elias GR
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Awarded to elias GR on 27 Jan 2012
How to get the the arrow length as legend in quiver function ?????
I had the same problem. I finally used the following workaround: 'hold on' the figure and use the 'quiver' command again in orde...
presque 3 ans ago | 2
| accepted
Solved
Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...
plus de 4 ans ago
How to speed up a for loop ?
If A have 3 rows and n columns, try that: angle=asin(A(3,:))./(sqrt(A(3,:).^2+A(2,:).^2+A(1,:).^2));
plus de 4 ans ago | 0
Hello, I have been trying to surf two parallel circles but data dimensions don't match and I don't know why. Any help would be nice. Thank you, Omar
Furthermore, surf is not the right command to do what you want. Try the following instead: fill3(X(1,:),Y(1,:),Z(1,:),'r') ...
plus de 4 ans ago | 0
| accepted
Hello, I have been trying to surf two parallel circles but data dimensions don't match and I don't know why. Any help would be nice. Thank you, Omar
Erase Z=[Z;Z]; This is not needed because X already have 2 rows and size(X)=[2 100]
plus de 4 ans ago | 0
Solving Poisson type of equation, increasing tolerance requirement leads to no response
The solution does not converge. It does not converge even with the 10-5 tolerance. You should print the max variable at each ste...
plus de 4 ans ago | 0
transform matrices into a single matrix?
Make a 3D matrix. If your 6x6 matrices are in the variables A1,A2,...,A20, then: A=zeros(6,6,20); A(:,:,1)=A1; A(:,:,...
plus de 4 ans ago | 0
How do I store output from double for loops, I only get the last iteration?
flygplatsmetar = cell(1,length(Data)); %initialize your 1D cell array for l = 1:length(Data) ... flygplatsmetar...
plus de 4 ans ago | 0
How to assign two values randomly among 2 variables?
r=rand; %random number between 0 and 1 if r<0.5 sensor1 = c1; sensor2 = c2; else sensor1 = c2; ...
plus de 4 ans ago | 0
Solved
radius of a spherical planet
you just measured its surface area, that is the input.
plus de 4 ans ago
Problem
Maximum of ND-array
Find the maximum element of a N dimensional array. Example: A=[1 2 4 ; -20 4 10]; The maximum is 10.
plus de 4 ans ago | 0 | 22 solvers
How to colour some node in a graph
Take a look here <https://www.mathworks.com/help/matlab/ref/plot.html?searchHighlight=plot#inputarg_LineSpec> You can give als...
plus de 4 ans ago | 0
How to remove a pattern in a table column
strfind function is what you need ( <https://www.mathworks.com/help/matlab/ref/strfind.html> ). I suppose that you have a cell a...
plus de 4 ans ago | 0
Solved
Convert a vector to a lower triangular matrix
I now have a row vector and I want to convert it to a lower trilangular matrix. The rows of the lower trilangular matrix have...
plus de 4 ans ago
Solved
Simple polynomial evaluation
Compute the value of a polynomial of degree n with all coefficients '1', at value x. n is always n>=0. p(x)=1+x+x^2+...+x^n...
plus de 4 ans ago
Problem
Sum of digits of 2^n number
Given n, find the *cumulative* sum of the digits of the number 2^n (where n>=0). Example: Input n = 7 Output sum = 2 ...
plus de 4 ans ago | 0 | 23 solvers
Solved
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 ...
plus de 4 ans ago
Solved
Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...
plus de 4 ans ago
Solved
Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...
plus de 4 ans ago
Solved
Circle area using pi
Given a circle's radius, compute the circle's area. Use the built-in mathematical constant pi.
plus de 4 ans ago
Solved
Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]
plus de 4 ans ago
Solved
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.
plus de 4 ans ago
Error calculation and using for loop
# You need to put your code inside a function, in order x and n to be parameters. # You can estimate the true value by just us...
plus de 4 ans ago | 0
trying with bisection method to create a function that finds the root of an equation, approximated error, and numbers of iteration
A first problem in your code is that the returned variable "root" does not always take a value. A second one is the "i= i+1;". i...
plus de 4 ans ago | 0
| accepted
Solved
Numbers with prime factors 2, 3 and 5.
Make a function which takes one positive integer n and returns a matrix with the numbers of the form (2^i)*(3^j)*(5^k) which are...
presque 9 ans ago
Problem
Numbers with prime factors 2, 3 and 5.
Make a function which takes one positive integer n and returns a matrix with the numbers of the form (2^i)*(3^j)*(5^k) which are...
presque 9 ans ago | 3 | 166 solvers
Solved
First N Perfect Squares
*Description* Return the first N perfect squares *Example* input = 4; output = [ 1 4 9 16 ];
presque 9 ans ago
Solved
Cannon Ball
Given g (acceleration due to gravity) and desired altitude x, find the minimum ground velocity of a cannon ball to reach x.
presque 9 ans ago
Solved
Tell me the slope
Tell me the slope, given a vector with horizontal run first and vertical rise next. Example input: x = [10 2];
presque 9 ans ago
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