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JPEG compression algorithm implementation in MATLAB
I think that you might as well replace t = dctmtx(8); y = blkproc(x, [8 8], 'P1 * x * P2', t, t'); with y = blkp...

environ 11 ans il y a | 1

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How to Subtract two rows of same matrix?
tmp = A(1,:)-A(2,:) But A1 is a 3x3 matrix and not like A which is a 2x2, so how do you want to insert the elements? We c...

environ 11 ans il y a | 0

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separate codes work, together don't
I don't know the values of the variables you are using but this seems to work n = 5; k = rand(n,n); sk = size(k) ...

environ 11 ans il y a | 0

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Scatter3 and surf yields a bug?
The reason the points disappear when you move the eye's position is because of axis clipping planes used by Matlab. When the poi...

environ 11 ans il y a | 0

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Is there a a function/code which can make the darker bits darker and the lighter bits lighter?
If you have the image processing toolbox you can use imcontrast. <http://www.mathworks.se/help/images/ref/imcontrast.html>

environ 11 ans il y a | 0

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Fast matrix computation of a 'riccati like' equation in a 'for' loop
I would like to preface my answer by saying that your code is essentially as fast as it gets. Matlab is very fast when it comes ...

environ 11 ans il y a | 0

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Help reduce the time.
On my computer it takes *0.0374 s* (q = 1:10⁷). The code is essentialy copying data. I tried with just removing the second eleme...

environ 11 ans il y a | 0

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Attempted to access indx(1); index out of bounds because numel(indx)=0.
It would be better if you could give us an example of all the arguments, so we can try it out for ourselves. I know what the imm...

environ 11 ans il y a | 0

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Image division into blocks
If you have the image processing toolbox you could use blocproc <http://www.mathworks.se/help/images/ref/blockproc.html blockpro...

environ 11 ans il y a | 0

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Convert a vector into a number
This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

environ 11 ans il y a

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How to set units of image of an array to pixels?
I believe you are looking for truesize(gcf, [1000 1000]) See <http://www.mathworks.se/help/images/ref/truesize.html doc...

environ 11 ans il y a | 1

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Building cylinder using isosurface
I would try using a function test = @(x) abs( cos(4*x) ); [x,y,z] = meshgrid(-1:.02:1); blob = z <= 0 & z >= -1 &...

environ 11 ans il y a | 0

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can anyone provide some literature on rician and rayleigh noise?
I don't know much about Rician noise in particular, but I have heard is the most difficult noise to reduce because it is not add...

environ 11 ans il y a | 0

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Problem plotting date from excel file
I think you want <http://www.mathworks.se/help/matlab/ref/datenum.html Datenum>.

environ 11 ans il y a | 0

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How can I determine or formulate certain intervals from a given set of data.
If I understand it correctly, you want something like this? %mock data, increasing numbers data = 50*rand(50,1); data...

plus de 11 ans il y a | 0

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Code for find the MST using Kruskal or Prims algorithm.
Do you want the code or just a function that computes MST? For the function, see <http://www.mathworks.se/help/bioinfo/ref/graph...

plus de 11 ans il y a | 0

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How do I convert a vector of vertex coordinates and a list of edges to a DXF file?
The program you mention can only convert one curve to a DXF file. Is it able to convert to a ascii DXF file? If that is the case...

plus de 11 ans il y a | 0

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Loop with different images on Matlab
I don't know exactly what you do in the function READINGPARAMETERS, but I would first let the function store the values in a mat...

plus de 11 ans il y a | 0

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Hello all, am a beginner to image processing,
Convolution, both linear and circular, is used in many areas of optics, image processing, signal processing and beyond. My m...

plus de 11 ans il y a | 0

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How do I create a grid of squares with text labels inside each square?
There are a couple of ways to do this, it depends on whether you want to have adjacent squares or squares with space between the...

plus de 11 ans il y a | 0

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How can i call the value of another variable defined or solved above for solving another equation?
Try syms x p = 1:7; f = 1:7; solve(p(1)*x^6+p(2)*x^5+p(3)*x^4+p(4)*x^3+p(5)*x^2+p(6)*x+p(7)==f(1), x)

plus de 11 ans il y a | 0

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How do I count the total number of conditions from .CSV file
_Edit: I first thought you wanted to store the values of 'i' when the conditions are true. So, I would use a vector for that. If...

plus de 11 ans il y a | 0

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Help with excel to matlab
Given the new problem I will give a new answer ;-) I would not store the characters as variable names, it is better to store ...

plus de 11 ans il y a | 0

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Help with excel to matlab
*Edit: I fixed the while so it uses Raw instead of tekst.* I think this code will do what you want. I only consider the examp...

plus de 11 ans il y a | 0

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How to vectorize a loop over rows ?
Jan: Nice. That was actually my first thought, but I only used it on x_test (regged and downloaded from Kaggle before Karan uplo...

plus de 11 ans il y a | 0

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Is there any way to control the number of decimal places for the outputs?
I would use num2str(pi,5) to get a string of pi with 5 decimals, for instance.

plus de 11 ans il y a | 0

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How to concatenate value calculated in a for loop?
I guess you want to place the values in a vector? Ratek = zeros(10,1); %preallocate vector for t=1:10 Ratek(t...

plus de 11 ans il y a | 0

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Batch file: how to access .mat files in different folders?
I assume that all your .mat files are at a certain level (one "folder" down) in the file tree. This could be modified to suit yo...

plus de 11 ans il y a | 1

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Adding values to a variable in a loop?
It seems as though pixel_data(i,1) is still a cell. Have you tried pixel_data{i,1}? If I try pixel_data={1,4,7,8} ...

plus de 11 ans il y a | 0

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code gives me a false values?
You want to store the result in the correct positions in the resulting vector. You keep placing the value in e1. It is better to...

plus de 11 ans il y a | 0