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My own suggestion might be to generate the 3D surface using g = surf(x), remove the edges using set(g,'EdgeColor','none'), and t...

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Answered 2 years ago

Hi I've got some code that preallocates some matrix L = zeros(50,50,50,50); and then iterates along the first two dimensions ...

2 Answers

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Asked 2 years ago

Hi I want my x-axis to be tight to the data on a plotyy graph. I can't seem to do it without messing up the axes. My data ...

Asked 3 years ago

Say I have some region-of-interest filter X, and I use B = A(X~=0) to only extract the values of A where X~=0, is it then possib...

4 Answers

If the ellipse has a uniform value the integral becomes the product between that value and the length of each beam through the e...

Answered 3 years ago

Hi I've got two matrices, one 30x30x50 and one 30x30x80 I would like to multiply them in such a way that the result is a 5...

This may be possible without a loop but I don't have the knowledge, however you can loop over i: for i = 1:360; out(i,:...

accepted

Answered 4 years ago

Hello I have the same problem, I found a solution earlier today although I have not myself tested it. It can be found here: htt...

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Responded 4 years ago

Hi, I asked this before and accepted an answer before having some trouble implementing the code, so I think I need to ask again....

3 Answers

Hi, I've created a figure and annotated it using "text(x,y,'sample)" code, and I've got about 8 instances of it on my figure....

1 Answers

Hello I can't find any mention of the spectral norm in the documentation. I want to calculate max(|Ax|)/x for any vector x...

Hi, I've got a loop which creates three matrices, and I want to store these for each iteration. Previously I've been saving t...

Hello I have a 128x128 matrix and I want to scale it down to 32x32. MATLAB's algorithm "imresize" seems to involve a smoothin...

I'm trying to compare different algorithms by imposing a time limit, however one of my algorithms calls fmincon and it seems imp...

Hi. Does anyone know why fmincon would ignore a 'Display','off' setting in the options? Here is my code: opt = optimset('Ma...

Hi I have a pixel grid (16,16) and I've generated a matrix A whose (i,j,k,l)th element specifies a property of the pairing of...

hello I'm trying to filter a circular image, the circle fits inside a square matrix, so for a 100x100 matrix the radius is 50...

I have a set of variables called "error1", "error2", etc. Each is a 4D matrix and I want to extract certain parts of them for...

I'm trying to write notes for my code and I want to know if there's a common notation which means what abs(A) does, ie. multiply...

Hi I'm trying to save a figure using 'print' but this process doesn't preserve the image/text proportions that are on my scre...

Hi I'm running a large code that is basically: for i = 1:50 load(i.mat, input); output = myfun(input); ...

Hi I tried to surf plot a discrete Laplacian matrix operator and it has broken MATLAB... I managed to close the figure, but t...

Hi I'm fitting using lsqcurvefit and the OUTPUT structure tells me there are 4 steps with 20 function evaluations before the ...

Hello I've been experimenting with a driver wiper program designed to remove sensitive data from a hard drive, eg. before it ...

Asked 4 years ago

ydata is 70x5 xdata is 70x1 plot(xdata, ydata) generates five lines with different colours how do I find what these colou...

I can't see any reason why, and if my PC crashes during a 20,000 loop iteration, it's a pain to figure out which iterations are ...

Hi, this may be a little vague I have a set of points in the unit circle and I want to quantify their separation, for example...

Hi I've got a square matrix and I'm using imshow and colorbar to plot it. The values are small, so colorbar naturally uses x1...

0 Answers

I don't know what LL1 or HH1 are but the 2D discrete Fourier transform should find you the frequency components of the image, in...

Hi I have five pairs of curves to plot on a 2d graph. This, I can just about manage- I use five colours and then distinguish ...

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