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Desiree


Last seen: ongeveer 2 maanden ago |  Active since 2019

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why am I getting this difference in the plotting?
I have a system of equations: This system satisfies a relation where is an initial condition. For I plotted the relation...

4 maanden ago | 1 answer | 0

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answer

Question


How it changes the the resulting figure?
Hello. I wrote a code that makes a 2d embedding from the columns of P to the first 2 non trivial eigenvectors and works fine. ...

meer dan 4 jaar ago | 0 answers | 0

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answers

Question


converting this LIBSVM data to a normal matrix?
Hello, I need to convert this LIBSVM data in form of struct with 2 fields to a normal matrix 8192x12. The data is here: https:...

meer dan 4 jaar ago | 0 answers | 0

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answers

Question


Getting inf in matrix?
I wrote a code where I’m implementing an algorithm. The code works, but the values in my Z matrix are all inf and I don’t know w...

meer dan 4 jaar ago | 0 answers | 0

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answers

Question


Plotting test time or train time?
I be have an algorithm which has the O((n*log(n))/eps^2 + d*log^3(n)/eps^4) train time where eps and d here are fixed. I want t...

meer dan 4 jaar ago | 1 answer | 0

1

answer

Question


Embedding data points problem
Hello. I wrote this following which I have theta data column points (1024 in my case)and finds the eigenvectors of the Laplace-...

meer dan 4 jaar ago | 0 answers | 0

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answers

Question


Creating a vector randn
Hi, I would like to know how to create a 1x301 vector that has Gaussian distribution with 0 mean and some variance sigma. Th...

meer dan 4 jaar ago | 1 answer | 0

1

answer

Question


How to add a noise in Shepp Logan Phantom?
Hello. I wish to know how to add for example SNR=(-5)DB or SNR=(-3)DB to a Shepp Logan Phantom. I already know how to deploy...

meer dan 4 jaar ago | 0 answers | 1

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answers

Question


Finding intrinsic dimensionality of data set
Suppose I have a random (100,10) matrix. Here’s a code that gives the pca: rng 'default' X=rand(100,10); X=bsxfun(@minus...

bijna 5 jaar ago | 1 answer | 0

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answer

Question


How to calculate amplitude of each frequency?
I have an image and I have a code which gives the 2d fft of each color of the image. Now I need to calculate the amplitude of ea...

ongeveer 5 jaar ago | 1 answer | 0

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answer

Question


Why it doesn’t work out?
I have an image im=imread(...)/255 and If want to take the 2d fft of a color then I use this: im=im(:,:,1); im_fft2=fft2...

meer dan 5 jaar ago | 1 answer | 0

1

answer

Question


Display maximal value in a range?
Hello. I would like to display the max(abs(sigma)) from around t=7 to t=10 from this code. The plot is from 0 to 10 and I tried ...

meer dan 5 jaar ago | 2 answers | 0

2

answers

Question


How to plot this while loop?
Hello. I’m trying to plot this while loop with no success. Each time it gives me a blank plot. Tried using hold on at the end of...

meer dan 5 jaar ago | 1 answer | 0

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answer