Answered
Matrix column subtraction problem
C = zeros(5,2*3); for p = 1:2 for q = 1:3 C(:,3*p+q-3) = A(:,p)-B(:,q); end end Or this: C = re...

meer dan 6 jaar ago | 0

| accepted

Answered
Generate N observations from a uniform distribution on [0,1] and compare it to a threshold
Here's another way. Let there be N1 trues and N0 falses. x = [repmat(true,1,N1),repmat(false,1,N0)]; x = x(randperm(N1+...

meer dan 6 jaar ago | 1

| accepted

Answered
How to find minimal distance between elements?
Let your vector be called v. Then do this: d = min(diff(sort(v))); This finds the minimum distance between any two elem...

meer dan 6 jaar ago | 4

| accepted

Answered
please check the following code in shown the error
It looks to me as though the line H(t) = rand(M(t),K) + i*rand(M(t),K); is in error. On the first trip through that for...

meer dan 6 jaar ago | 0

Answered
key generation and inversing
Your code first puts the successive integers from 1 to n*m in the vector 'invKey'. Then it subjects them to a randomly determin...

meer dan 6 jaar ago | 1

| accepted

Answered
How can i generate continuous random numbers with multiple limit zones in matlab? For ex:i want numbers btw 50 and 150 but it should not contain numbers from 110 to 120
I interpret your words "continuous random numbers" to mean all real numbers within the given limits, not just integers. Suppose...

meer dan 6 jaar ago | 1

| accepted

Answered
Find the max value in a kernal
Let M be your matrix. Let R be a vector of the matrix's row subscripts of your kernel, and let C be a vector of corresponding c...

meer dan 6 jaar ago | 0

Answered
3 dimentions matrix Creation
I think you asking how to do this: A = repmat(A,1,1,100);

meer dan 6 jaar ago | 0

| accepted

Answered
Select nearest value on a vector for a given value
I notice that your vector 'Value' has ascending elements. If we can assume that, the following can be used: s = -8; % Or...

meer dan 6 jaar ago | 0

| accepted

Answered
Displaying complex roots of quadratic equation
On that 'else' part you need to find the two values real(x1) and imag(x1) as well as these two for x2. Then provide a display o...

meer dan 6 jaar ago | 0

Answered
A(:) = B, the number of elements in A and B must be the same. error, what am I doing wrong?
The problem lies with the lines x(k) = x(k-1)+dxdt*Ts; y(k) = y(k-1)+d2xdt2*Ts; z(k) = z(k-1)+d3xdt3*Ts; On the...

meer dan 6 jaar ago | 0

Answered
How to make 3 random numbers that sum to 1
If you want your results statistically uniform area-wise, you can use the 'randfixedsum' function in the File Exchange at: <h...

meer dan 6 jaar ago | 2

Answered
Finding the sum of a series without symsum
You don't need 'symsum' to evaluate that series. It's easy to see that its sum is com_cos = cos(x_val)-1 just by inspec...

meer dan 6 jaar ago | 1

| accepted

Answered
Different result by hand-differentiaion vs MATLAB diff() function.
Your "hand-differentiation" is not correct! The 'diff' answer is correct but can be simplified to an equivalent -2/(y+1)^3. (...

meer dan 6 jaar ago | 0

| accepted

Answered
plot plane through set of 3d point
If X, Y, and Z are vectors of the x,y,z coordinates of your points, do this: dX = X-mean(X); dY = Y-mean(Y); dZ = Z...

meer dan 6 jaar ago | 0

Answered
How to create a specific vector c that has two variables x and y ?
Assume your xi's and yi's are given by a couple of column vectors, x and y of the same length. n = length(x); A = [x.^(n...

meer dan 6 jaar ago | 0

Answered
How to solve a system of equations?
To solve these you would have to satisfy both x(1)^2 + (x(2)+10)^2 + x(3)^2 = x(1)^2 + (x(2)-10)^2 + x(3)^2 x(1)^2 + (...

meer dan 6 jaar ago | 1

Answered
Hi!!! I have a N-dimensional matrix. I want to convert into vector by discarding the decimal values less the 0. Please provide matlab code for this. Thank you
Let M be your matrix. M = M(M>=0);

meer dan 6 jaar ago | 0

| accepted

Answered
kindly help in debugging the following code for optimization
Matlab's error message is quite true - you have not defined P. Evidently you intended to have: P = [P1 P2 P3 P4 P5]; bu...

meer dan 6 jaar ago | 0

| accepted

Answered
Evaluate a Polynomial without polyval
Note that you can avoid the necessity of computing powers of x in the following. It works even if x is an array. It should sav...

meer dan 6 jaar ago | 0

Answered
Custom Uniform Random Distribution
If you want to obtain a density distribution proportional to 1/sqrt(x) for x in some finite interval [a,b], you can proceed as f...

meer dan 6 jaar ago | 0

Answered
how to generate combination through specific matrix dimension?
As James has stated, your question is not clear. I'm going to make a very wild guess as to your meaning. If it is wrong, as is...

meer dan 6 jaar ago | 0

Answered
I want to plot F(x) and G(x) in same graph for x=(-10,10) how can I do this?
x = linspace(-10,10); f = 5*x.^2+9*x+2; G = 3*x+12; plot(x,f,'r-',x,G,'g-')

meer dan 6 jaar ago | 0

Answered
How do I plot this?
I assume you had in mind that x is given in degrees. You will get some discontinuities with these: x1 = 1:.1:20; y1 = 2*s...

meer dan 6 jaar ago | 0

Answered
Undefined function or variable 'r', but I am confident I defined it
In your code you set xrold equal to xr and compute ea: ea=abs((xr-xrold)/xr)*100; which not surprisingly gives ea a zero...

meer dan 6 jaar ago | 0

Answered
How can I fix the error, or what does it mean "Subscript indices must either be real positive integers or logicals."?
The error refers to the line Density(n,N) = ... because both n and N are being as indices in 'Density' but neither are ...

meer dan 6 jaar ago | 0

Answered
Generate pair of random numbers with respect to a sum constraint?
(Corrected) Assuming you restrict x and y to non-negative values, the set of x and y values for which x+y<=1 would be a triangu...

meer dan 6 jaar ago | 1

| accepted

Answered
How to find a velocity when you have time and position values in an array?
Let x and y be row vectors of the same length where x gives successive values of the independent variable and y the correspondin...

bijna 7 jaar ago | 0

Answered
dr/dt* ln(a*r*dr/dt)=b/r^7 how to solve this equation
Here is how I would approach your problem. First we write a*r*dr/dt*log(a*r*dr/dt) = a*b/r^6 Now define w: w = log...

bijna 7 jaar ago | 0

Answered
According to SVD technique A=U*S*V'. But when I apply SVD to my image, I am not able to retrieve my original image. Is that because S matrix is not taking the all the eigen values? Eventhough, I had to get a partially correct image?
You've left off the transpose operator at the last step: ap*v'; It's a very small character, but it's all-important! ...

bijna 7 jaar ago | 0

| accepted

Load more