Answered

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...

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

Answered

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));

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

Answered

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') ...

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

Answered

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]

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

Answered

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...

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

Answered

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(:,:,...

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

Answered

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...

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

Answered

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; ...

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

Answered

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...

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

Answered

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...

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

Answered

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...

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

Answered

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...

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