Beantwortet
Anyone know the algorithum of bwconncomp/bwlabel ?/Coding problem
In a BW image, I would first find the boundaries, using shifts. Then do systematic marching along the boundaries, as in, start f...

mehr als 11 Jahre vor | 0

Beantwortet
Get new variable if a condition verifies in a cell
First eliminate any rows that are not 2010, 2009 or 2008. I am assuming here that 2010 is the latest year so: check1=nnz(A(:...

mehr als 11 Jahre vor | 1

| akzeptiert

Beantwortet
How can I measure how many pixels a single irregular object has?
I assume the sea of blue there are all 0s, so I would do image(image~=0)=1, and you will have a black and white image of only 1s...

mehr als 11 Jahre vor | 0

Beantwortet
Changing variable names based on a string
Use _eval_ alongside _strcat_ and _num2str_.

mehr als 11 Jahre vor | 1

Beantwortet
A simple matrix operation
BB=repmat(B,[n 1]); C=A./BB;

mehr als 11 Jahre vor | 1

Beantwortet
Calculate how often a 1 turns into a 0 or 1, and vice versa
check1=(a+circshift(a,[-1 0])); check2=(a-circshift(a,[-1 0])); check1==0 % is 0's followed by 0's check1==2 % is 1's f...

mehr als 11 Jahre vor | 1

Beantwortet
Image reconstruction from edge information
Your problem if I understand correctly, is in fact solvable. I don't think you communicated the fact that the image is binary ef...

mehr als 11 Jahre vor | 0

Beantwortet
How to shuffle some arrays of a matrix?
p = randperm(n)

mehr als 11 Jahre vor | 0

Beantwortet
Bi-linear Regression- Model fitting
That sounds like a problem that would be better solved with a clustering or classification tool rather than regression. If you r...

mehr als 11 Jahre vor | 0

Beantwortet
How I can to rename a variable in loop for?
There is an ugly way to do this using the _eval_ function. Something like: for i=1:12:t eval(strcat('moist_',mes(o),...

mehr als 11 Jahre vor | 0

Beantwortet
find an equation for the set of coordinates
I would use cftool, easier to play around with different fits, and not confined to polynomials.

mehr als 11 Jahre vor | 0

Beantwortet
Adding all possible combinations of array elements
Use combnk to get the the unique combinations over a,b,c and d. For each of those combinations, use base math to get the repetit...

mehr als 11 Jahre vor | 0

Beantwortet
Anyone has bwconncomp source code? Or its algorithm
C:\Program Files\MATLAB\R2013b\toolbox\images\images\private is a good place to start. You might have to chase a lot of depen...

mehr als 11 Jahre vor | 0

Beantwortet
Extract (splined) function from two vectors
This might sound like a simple-minded suggestion, if you are looking for a function "slightly below" the one you drew, why not j...

mehr als 11 Jahre vor | 0

Beantwortet
How to extend the fitting curve in command
All you need to do is calculate Y axis for that entire range using the fit you calculated. Pass x=0:1:1400 through f(x), then pl...

mehr als 11 Jahre vor | 0

| akzeptiert

Beantwortet
How to eliminate the rows with replication?
C = unique(A,'rows')

mehr als 11 Jahre vor | 0

| akzeptiert

Beantwortet
Efficient alternative to bwconncomp?
Have you tried using the circular Hough transform? I am not sure if it would be faster, but should be worth a try.

mehr als 11 Jahre vor | 0

Beantwortet
Polynomial arrays intersection and area within intersection
help polyval And the rest is your homework. Good luck.

mehr als 11 Jahre vor | 1

Beantwortet
How can I change Axis properties in cftool?
I was able to do this easily using file->print to figure, then changing the scale as in any other figure. Also, make sure you do...

mehr als 11 Jahre vor | 0

Beantwortet
Crossvalidation of liinear models?
This depends on how you would like to do the cross validation. Leave-one-out cross validation has a nice trick for linear models...

mehr als 11 Jahre vor | 1

Beantwortet
Max()-function and multiple dimensions
Do: [C I]=max(x(:)); now C is the maximum value, I is the index of where it is, so that x(I) is C. If you want the 5...

mehr als 11 Jahre vor | 3

| akzeptiert

Beantwortet
Solve Poisson Problem with Finite Difference using parallelization
Poisson equation boils down to a simple Ax=b problem. If you have the parallel computing toolbox, using mldivide (or the plain \...

mehr als 11 Jahre vor | 1

Beantwortet
Two dimensional projections of a three dimensional curve
This is not a very clear question. If you are just interested in 3 2D projections of a 3D object, all you have to do is plot x&y...

mehr als 11 Jahre vor | 0

| akzeptiert

Beantwortet
How to export 3d surface plot figure(matlab figure) to xhtml?
Check out plot.ly, very nice interactive plotting tool for MATLAB. https://plot.ly/matlab/

mehr als 11 Jahre vor | 0

Beantwortet
how can I find the cell no: of the minimum value in a m*n*x matrix
index=find(A==min(A(:))); Then A(index) will give you the minimum value. If you need the explicit 3D index checkout the func...

mehr als 11 Jahre vor | 0

Beantwortet
Principle Component Analysis (PCA) bi-plot vector magnitude
I am not sure how princomp works, but here is a quick way to do this. 1) mean center your data, meaning subtract the mean acr...

mehr als 11 Jahre vor | 1

| akzeptiert

Beantwortet
How to plot the contour of a circle, when the data are stored as vectors from the origin.
Your values are in polar form. You can contour plot them in a cartesian frame as x-axis=r and y-axis=angle in which case you wou...

mehr als 11 Jahre vor | 0

| akzeptiert

Beantwortet
Efficient way of reading cell arrays
This really doesn't make much sense without context to me. This is an incredibly inefficient data storage configuration. From wh...

mehr als 11 Jahre vor | 0

Beantwortet
sum of an array and checking condition
checksum = 0; I=0; while checksum<=limit I=I+1; checksum=checksum+yourarray(I); end

mehr als 11 Jahre vor | 0

Beantwortet
how can I solve a over deterministic system with least square method?
Check the function regress if you have the statistics toolbox. If you don't have the toolbox, you can use a variety of functi...

mehr als 11 Jahre vor | 0