Question

make an r by m permutation matrix

I have the following code : A = eye(r); L = []; for i = 1:10 A = A(randperm(r),:); L = [L A]; % 10 x 100 matrix wit...

17 days ago | 0 answers | 0

Question

How to verify SNR of a signal after using the awgn function

I just added 60db noise to my signal and i wish to verify if the added noise is correct. How do i check this? pw=60; Wthe...

3 months ago | 1 answer | 0

Question

How can I use the MovieLens Dataset in matlab

I want to use the MovieLens dataset for my NMF algorithm for matrix completion. I have a function which i use to sample data in...

6 months ago | 0 answers | 0

Question

how can i reshape an indexed vector

Hello, I have the following problem: Q % e.g. 300 x 300 matrix M % e.g. 300 x 300 matrix omega=find(Q); % omega becomes a 86...

6 months ago | 2 answers | 0

Question

How can I add a 0db noise to my randomly generated data?

I simulated some random data and wish to add different db levels of noise to the data below n = 5000; m = 5000; r =5; Wt...

8 months ago | 1 answer | 0

Question

dynamically name function output

I would like to to dynamically name fuction output based on some inputs Like: As my variable para.algo will be changing, is i...

9 months ago | 0 answers | 0

Question

How can I randomly sample 10% and 20% pixels of an image

Hello guys I have an image of size 2,048×2,048 pixels, I would like to stack the 3 channels to get a matrix of size 6,144 ×...

10 months ago | 0 answers | 0

Question

Randomly samplying a matrix

Im currently modifying an algorithm which randomly samples a given matrix by % Omega - set of observed entries. Should be li...

10 months ago | 0 answers | 0

Question

Does running multiple instances of Matlab slow down algorithm?

I have 4 algorithms that i want to benchmark. and it takes time to run, and i dont want to run each of them seperatly, so i sta...

11 months ago | 0 answers | 0

Question

What is this Matlab symbol '' | ''

Guys, could someone explain what this expression does. Ive never seen this expression before. Thank you. pGrad=gradX(gradX<0|X>...

11 months ago | 1 answer | 0

Question

save all columns into a new variable in a loop

I have the following setup. Every time k changes i get new values of T. T is of size 1x1000, so i want to end the end have a 3...

1 year ago | 1 answer | 0

Question

reconstruction Error of 2 colored images

I have an original image of dimension 300x300x3 (RGB) after removing some entries, I apply an algorithm to reconstuct the ori...

1 year ago | 0 answers | 0

Question

Re-extract final images after vectorizing a set of images

I have 20 images each of which is 175 x 200. then i create a matrix X and unfold each image into it. so that X becomes a (175*20...

1 year ago | 0 answers | 0

Question

Given a matrix A^n. Comparing normal multiplication versus Diagonalization. I expect the former to be faster but its not in my case

I have been learning diagonalization and SVD. I tried to show by code that doing A^n = A* A* A*......* n is slower than when we ...

1 year ago | 2 answers | 0

Question

Error using sparse Index into matrix must be positive.

Im converting a code from python to Matlab % Python Code % ksq and old_dim are dimensions e.g. 5, or 10 C = np.arange(old_di...

1 year ago | 1 answer | 0

Answered

Please teach me by explaining to me what this question is asking me to do!

Hello, It will be hard to find a Tutor dedicated to teach you. On here the community just helps you with your programming probl...

Please teach me by explaining to me what this question is asking me to do!

Hello, It will be hard to find a Tutor dedicated to teach you. On here the community just helps you with your programming probl...

1 year ago | 1

Question

Find minimum of a 15x100 and return in a vector of 1x100. is this possible?

I have i=5 ; nu=150 ; for j =1:15 load(['output/GC/rank_', int2str(i), '/nu_',int2str(nu),'/NeNMF_GC_', int2str(j), '....

1 year ago | 1 answer | 0

Question

Write several 1x101 vectors to table for Latex

I have 2 variable each of which are 1x101 size A = AS_V ; % AS_V is 1x101 B = NeNMF_V; % NeNMF_V is 1x101 T = table(A,B)...

1 year ago | 1 answer | 0

Answered

Why do I receive the error message "The system cannot find the file specified"

It could be many possibilities Old files interfering with you previously installed Matlab Path of the installation. Check to s...

Why do I receive the error message "The system cannot find the file specified"

It could be many possibilities Old files interfering with you previously installed Matlab Path of the installation. Check to s...

1 year ago | 0

| accepted

Question

legend has same colors

Its been asked many times but my code looks fine. I dont know whats making matlab show same colors on the legend figure(1), ...

1 year ago | 1 answer | 0

Question

Create mask over image

I am trying to create mask over an image (input). I already used photoshop to create a mask (which is basiclly an image with sam...

1 year ago | 2 answers | 0

Question

remove zeros from a 15x300 matrix and find the median

when I run the code below I get 15x301 matrix AS_V with some receding zeroes for i=1:15 load(['output/NeNMF_V_', int2str(...

1 year ago | 1 answer | 0

Question

How do I make text color black when using the function insertText

Hello I created a white image using the code below. and then i inserted a text. but the text has yellow background. I dont know ...

1 year ago | 2 answers | 0

Question

Apply mask to RGB image. If mask is RGB as well do i have to seperet the mask to its channels too?

Hello I want to apply this mask onto this RGB color to use in NMF ... function [ R, B,G ] = Split_Image( ) Input=...

1 year ago | 1 answer | 0

Solved

Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

1 year ago

Answered

check a condition once and remember it later in the code

So i modified @Adam's answer. I edited the two functions GC and RSI so that they both have same number of inputs if strcmp(op...

check a condition once and remember it later in the code

So i modified @Adam's answer. I edited the two functions GC and RSI so that they both have same number of inputs if strcmp(op...

1 year ago | 0

Question

check a condition once and remember it later in the code

I want to check for an input at the beginning of my code. then when i enter a while loop i don't want to recheck this input, ...

1 year ago | 2 answers | 0

Question

Matab -clearvars equivalent in Python

Hello guys, Whats the Matab clearvars -except vars1 vars2 equivalent in Python. Thanks in advance

1 year ago | 0 answers | 0

Question

Label Columns and Rows of Dat file

Hello Guys,, How to I Label the rows of a dat file. to look like in the picture below clear clc nu= 50; ps=1; load([...

1 year ago | 0 answers | 0

Question

write output to .dat file yielding repeated values

Hello Matlabers, I'm trying to write my output to a dat file but it apears not all the values are entered. I want the .dat fil...

1 year ago | 0 answers | 0