Answered
Masking out Image area using Binary Mask
Let I be the m-by-n image, and let M be the m-by-n mask. The new image, Inew, will be m-by-n and have zeros everywhere there ...

nästan 12 år ago | 14

| accepted

Answered
Surf z axis not visible
After issuing peaks issue the command zlabel('z')

nästan 12 år ago | 1

Answered
RESAMPLING DATA
One way: numData = xlsread('yourExcelFile.xlsx'); % read in data numDataOut = numData(1:15:end); % subsample (get every ...

nästan 12 år ago | 0

| accepted

Answered
compute the unit vector given the angle
Given the angle theta in radians (counter-clockwise is positive theta, theta = 0 points in the positive x-direction) you...

nästan 12 år ago | 0

Answered
I am writing code for a function but I get an error message
Just replace && with & and double pipes | | with | to operate on nonscalars.

nästan 12 år ago | 2

| accepted

Answered
merge number and character
If x = 3; y = '-'; merge with [num2str(x),y]

nästan 12 år ago | 1

Answered
dividing a matrix into equal submatrices
I assume that your vector, x, is n-by-1 where n is divisible by 10. Try xIntoTenPieces = reshape(x,[],10); which p...

nästan 12 år ago | 0

| accepted

Answered
Problem with the mean function
Try this meanWithoutNans = mean(refoulement(~isnan(refoulement)));

nästan 12 år ago | 0

| accepted

Answered
Count number of specific values in matrix
Try this: numberOfNonZeros = nnz(m==4); Using nnz is more efficient than converting logicals to numeric, which is requir...

nästan 12 år ago | 18

Answered
Operate on Successive Values Without Loops
Totally... first arrange your vectors as column vectors, then try distance = sum(sqrt((x(1:end-1)-x(2:end)).^2 + (y(1:end-1...

nästan 12 år ago | 0

| accepted

Answered
Attempt to have a 3D mesh plot of max value of real part of eigenvalues of a matrix. Shows error saying that 'Error showing Horzcat. CAT arguments dimensions are not consistent' even though my matrix is square.
When you create BKm, you use the output k from meshgrid. The output k is a 1001 square matrix that you are effectively trying t...

nästan 12 år ago | 0

Answered
still not getting the oop concept... please help
You can get the behavior you want if you subclass the handle class. To do this, 1.) replace the line classdef manlists ...

nästan 12 år ago | 1

Answered
matlab trick
I'm assuming the images all have the same extension and that the file format is supported by imread. Also, I'm assuming that th...

nästan 12 år ago | 0

Answered
Integral of sin(cos(x))
Ultimately, are you trying to compute a definite integral? If there are limits, you may be able to use Bessel functions to eval...

nästan 12 år ago | 0

| accepted

Answered
how to click a point in an image
Check out the function ginput doc ginput

ungefär 12 år ago | 0

Answered
equality operator between matrix and scalar
The value .1 and a(12) differ by only one bit as a result of numerical round-off. You can see this with the commands num2h...

ungefär 12 år ago | 1

Answered
Assigning time points on X axis
If your sampling frequency is 44.1 kHz, then one millisecond comprises 44.1 time samples. So, if x represents the vector of 18,...

ungefär 12 år ago | 0

| accepted

Answered
Sorting NaN
This will work newA = a; % copy original matrix isANanRow = any(isnan(a),2); % find rows that have a nan in them % mo...

ungefär 12 år ago | 0

Answered
Transforming uniform variables to normal variables
You know that the histogram shouldn't exactly match a Gaussian... Nevertheless, if you use the command above, you are guaranteed...

ungefär 12 år ago | 0

Answered
Transforming uniform variables to normal variables
I will assume that your uniform random variables are stored in an array just like the one created with the commands X = ran...

ungefär 12 år ago | 0

| accepted

Answered
Using a variable in a matrix then plotting one element of the matrix.
When matlab sees A.*B or A.^B the two arrays A and B need to be the same size. In the expression Z = -M.*Om.^2 + i.*Om.*C + K, ...

ungefär 12 år ago | 0

| accepted

Answered
Recursive relation
First, if y depends on the variable x, it would help if you renamed the coefficients in the power series expansion for y from x_...

ungefär 12 år ago | 0

Answered
Recursive relation
If I assume a power series solution of the form y(x) = \sum_{k = 0}^\infty\alpha_kx^x, I arrive at the recursion (n+1)\...

ungefär 12 år ago | 0

Answered
How to reshape a cell array of cell arrays
I assume your 1-by-10 cell is just like the 1-by-10 cell C created with the commands C = cell(1,10); for i = 1:10 ...

ungefär 12 år ago | 6

| accepted

Answered
Quickly converting country names to numbers
I assume your table is a n-by-2 cell array, where the first column contains cells whose contents are the names of each country a...

ungefär 12 år ago | 1

| accepted

Answered
MATLAB Matrice Function Question help please?
It's a toeplitz matrix... so use the command toeplitz(0:4) to recreate your example. I'm sure you can extrapolate to t...

ungefär 12 år ago | 2

| accepted

Answered
vectorizing nested loops
Sorry, but I don't have a suggestion to vectorize this thing. However, as the following code demonstrates, it looks like you co...

ungefär 12 år ago | 1

Answered
xlswrite dropping strings
It's hard to tell without more detail on the contents of result.xls_full_data. However, if your strings are nested in a cell in...

ungefär 12 år ago | 1

Answered
Need to make a 4D plot (3D + Colour)
I take it that the four dimensions are the four different indices you are using to index your signals? If so, why would you trea...

ungefär 12 år ago | 0

Answered
MATLAB OOP - calling an object method from within another object method
One way is via composition: (see <http://en.wikipedia.org/wiki/Object_composition>) Let your two classes be class A and class...

ungefär 12 år ago | 0

| accepted