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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...

oltre 11 anni fa | 1

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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));

oltre 11 anni fa | 0

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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...

oltre 11 anni fa | 0

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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'), ...

oltre 11 anni fa | 0

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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...

oltre 11 anni fa | 6

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

oltre 11 anni fa | 1

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

oltre 11 anni fa | 0

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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...

oltre 11 anni fa | 4

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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)

oltre 11 anni fa | 2

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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); ...

oltre 11 anni fa | 1

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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...

oltre 11 anni fa | 0

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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 ...

oltre 11 anni fa | 0

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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 ...

oltre 11 anni fa | 0

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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...

oltre 11 anni fa | 1

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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...

oltre 11 anni fa | 1

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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-...

oltre 11 anni fa | 0

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

oltre 11 anni fa | 1

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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...

oltre 11 anni fa | 0

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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...

oltre 11 anni fa | 1

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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 ...

oltre 11 anni fa | 0

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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. ...

oltre 11 anni fa | 0

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

oltre 11 anni fa | 0

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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...

oltre 11 anni fa | 0

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

oltre 11 anni fa | 18

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

oltre 11 anni fa | 0

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

oltre 11 anni fa | 1

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

oltre 11 anni fa | 1

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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...

oltre 11 anni fa | 0

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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...

oltre 11 anni fa | 0

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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...

oltre 11 anni fa | 0

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