Answered
Find minimum difference between matrices.
Another way using histc() function (may be faster for large matrices). A = rand(5,5); %first matrix B = rand(2,3); %s...

11 years ago | 1

Answered
How to repeat rows of matrix?
One way: f = @(k) repmat(M(k,:), round(V(k)), 1); MM = cell2mat(arrayfun(f, (1:length(V))', 'UniformOutput', false));

11 years ago | 0

| accepted

Answered
Size of data points in random scatter image
This is actually a relatively straightforward process. Steps: 1. Threshold image to convert to black and white. im2bw() fu...

11 years ago | 0

| accepted

Answered
Comparing Vector Elements (of 2 vectors)
I think this should do what you want: Rc = mat2cell(R, 1, ones(size(R))); comp = cellfun(@(x) find(P<x,1,'last'), ...

11 years ago | 0

| accepted

Answered
Find consecutive values in a vector that are above a threshold
One way: s = RandStream('mcg16807','Seed',0); RandStream.setDefaultStream(s); %set seed so example is reproducible m...

11 years ago | 6

| accepted

Answered
How to divide an arc?
If I understand your question correctly, John D'Errico's interparc ( <http://www.mathworks.com/matlabcentral/fileexchange/34874-...

11 years ago | 1

Answered
Extract Variable from Filename?
You can use strtok() or other methods, but I prefer regexp here: filename = 'sitename.yr.synth.daily.mat' %example ...

11 years ago | 0

| accepted

Answered
Matlab code for system of differential equations (chemical kinetics) fitting to data
To be clear, you want to fit experimental data to a system of differential equations with some number of unknown parameters, cor...

11 years ago | 4

Answered
I have matrix A, how can I add a row in matrix A with others rows of matrix A ?
b = sum(a(:,1:10:91),2)

11 years ago | 2

| accepted

Answered
thermal images processing || Need help! :)
Here's an example of an approach that might work: X= imread('coins.png'); %sample indexed image BW = (X > 100); ...

11 years ago | 1

Answered
convert Vector into matrix ?
It might not be very efficient, but I think it should work: nc = 3; %number of columns in B nc = nc-1; c = 1:(length...

11 years ago | 0

Answered
Improve Ellipse Fit around a Binary Image
To build on Image Analyst's point, you can do something like this. outline = bwmorph( isolatedBean, 'skel'); %convert ...

11 years ago | 0

Answered
How to resample a signal by a fraction
You could use interpolation instead. Something like this: vnew = interp1( t, v, t/(1+a), 'linear'); You could use other ...

11 years ago | 0

| accepted

Answered
Filling gaps in time series with Nan
One way that considers floating point errors: startValue = datenum(2013,5,17,0,0,0); %your starting observation endVa...

11 years ago | 1

Answered
How do I get regexp to read specific values in a text file?
This seems to work for me: pattern = 'Platform:\s+(\d+)'; data = regexp(indata, pattern, 'tokens'); data = cell2mat...

11 years ago | 1

| accepted

Answered
how to find indices on a boundary?
You can use the inpoly() function on the file exchange ( <http://www.mathworks.com/matlabcentral/fileexchange/10391-fast-points-...

11 years ago | 0

Answered
I need help (palindrome vector)
y = x([1:end, end-1:-1:1])

11 years ago | 1

Answered
Extract non-zero elements from matrix with double precision numbers
notZeros= M(M~=0); Keep in mind that due to numerical precision, some of your matrix elements may be small but not identica...

11 years ago | 0

Answered
index of a sequence
You don't really need the loops: a=[50 150 80 200 30]; b=[60 50 150 70 200]; [d,rows]= min([a;b], [], 1); %get l...

11 years ago | 1

| accepted

Answered
How to a partition a data set of days into weekdays and weekends
Hi Torrey, I think this should do it: %Matrix is your 365x48 matrix %Every 4th and 5th rows are Saturday and Sunday ...

11 years ago | 0

Answered
Script Writes Correctly, The Graph Still Doesn't Show Up
Call hold on after your silhouette() call. 'hold on' prevents the current axes from being cleared after each plotting command. ...

11 years ago | 0

| accepted

Answered
replacing components of a matrix
%your matrix is M isBetween = (M >= 2.9) & (M <= 3.2); M(isBetween) = -1

11 years ago | 0

| accepted

Answered
how to calculate the area under a plot? when I use the area option, I'm not getting a satisfactory value. someone pls help me.
This isn't what the area() function does. The area function plots a filled shape below the line that is passed into it. The grap...

11 years ago | 0

Answered
How do I get both the minimum of a 2D matrix and it's indices?
minMatrix = min(matrix(:)); [row,col] = find(matrix==minMatrix);

11 years ago | 18

Answered
How to open .dat file
Use the functional form of load, i.e. load(f)

11 years ago | 0

| accepted

Answered
How can shape a matrix with predefined vectors?
N = [N1; N2; N3];

11 years ago | 1

| accepted

Answered
XTick Visibility off with XTickLabel showing
set(axes2, 'TickLength', [0 0]);

11 years ago | 1

| accepted

Answered
How to avoid for loops when generating index arrays?
It's kind of hack-y, but it gives the same output as your original posting: n=4; l = cell2mat(arrayfun(@(x) x*ones...

11 years ago | 0

Answered
How can I plot 3D TENT with MATLAB?
For part (a), I would look up the documentation for the following two commands: linspace %to create your x and y domain ve...

11 years ago | 0

Answered
Loading ascii data file with headers
This should do it fid = fopen('path/to/your/file.txt', 'rt'); Data = textscan(fid, '%d %f %f', 'headerLines', 3, 'Collec...

11 years ago | 0

| accepted