Salad Box
Last seen: 3 meses ago
73 total contributions since 2017
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Question
'word2vec' not found
Hi I'm using 2018b and 'text analytics toolbox' appears in my toolbox list. However, when I type >> which word2vec 'wor...
4 meses ago | 1 answer | 0
1
answerQuestion
Looking for the RGB values of the 8-bit 256 colours?
Hi, My question is below at the bottom. So what are the RGB values of these 256 colours mentioned in the red box above? ...
4 meses ago | 1 answer | 0
1
answerQuestion
How to select only ADJECTIVES from a list of strings?
Hi I have a list of words in the string format. See below I would like to only select adjectives from this list. How...
5 meses ago | 1 answer | 0
1
answerQuestion
what does it mean and what do i need to do? (warning message)
Warning: MATLAB previously crashed due to a low-level graphics error. To prevent another crash in this session, MATLAB is using...
alrededor de 1 año ago | 0 answers | 0
0
answersQuestion
Is this a valid expression?
Hi offsets = [32 48 64 80 96 112]; [X,Y,Z] = ndgrid([-1, 0, 1]); offsetArray = [Z(:), Y(:), X(:)]; offsetA...
alrededor de 1 año ago | 2 answers | 0
2
answersQuestion
'combnk' enumeration of combinations
Hi, If I use 'combnk' in a all positive region, it gives me all the possible combinations. >> c = combnk(1:3,2) c = ...
alrededor de 1 año ago | 1 answer | 0
1
answerQuestion
How to evaluate the performance of K-means?
Hi, I would like to evaluate the performance of k-means. I saw the below cost function (1) online, where wik=1 for data point...
alrededor de 1 año ago | 1 answer | 0
1
answerQuestion
'break' in 'while' loop
Hi, I have a 'while' loop inside a 'while' loop. while %%% while %%% break end %%% sta...
alrededor de 1 año ago | 1 answer | 0
1
answerQuestion
Sort matrix based on values in the first row from small to large
Hi, I have a matrix M M = 39 93 143 64 36 1 2 3 4 5 I would like to sort the matrix M by v...
alrededor de 1 año ago | 1 answer | 0
1
answerQuestion
How to use 'center pixel' in a sliding block to represent this block using 'nlfilter'?
Hi, I am dealing with all the coloured images rather than greyscale images. So a lot of the filtering algorithms appear sligh...
alrededor de 1 año ago | 0 answers | 0
0
answersQuestion
To apply a median filter on a coloured image, why do I have to use 'medfilt2' on each channel separately rather than use 'medfilt3'?
Hi, I have a color image and would like to use a 9 x 9 median filter. Method A - using 'medfilt2' on each channel separatel...
alrededor de 1 año ago | 0 answers | 0
0
answersQuestion
How to apply a median filter on a coloured image?
Hi, I'm not exactly sure how 'median filter' works on a coloured image. I can understand how the median filter work on a b...
alrededor de 1 año ago | 0 answers | 0
0
answersQuestion
Sliding Neighbourhood Operation (Image Filtering)
Hi, I have a sample image and I would like to apply a 4 by 5 'sliding block' to this image. In each 4 x 5 block, I would ...
alrededor de 1 año ago | 0 answers | 0
0
answersQuestion
Does 'imresize' generate artificial pixel RGB values which are not contained in the original image?
Hi, I would like to know whether 'imresize' generate artificial pixel values which are not contained in the original image. ...
alrededor de 1 año ago | 1 answer | 0
1
answerQuestion
How to know the real row and column indices of a pixel in the image
Hi, I have an image. See below. >> fn = 'Unknown.jpg'; >> RGB = imread(fn); >> whos RGB Name Size ...
más de 1 año ago | 1 answer | 0
1
answerQuestion
How to replace values of certain rows in a matrix?
Hi, I have a matrix "a" a = 1 1 2 2 3 3 4 4 I would like to replace the 2nd and...
más de 1 año ago | 1 answer | 0
1
answerQuestion
Evaluation of k-means performance in terms of 'sumd'
Hi, To give a simple example: I have 4 data points p1, p2, p3, p4 (in blue dots). I performed k-means twice with k = 2 and...
más de 1 año ago | 1 answer | 0
1
answerQuestion
Initial centroids selection - Kmeans
Hi, Am I allowed to choose k initial centroids that are not contained in the original data set, in another word, not using th...
más de 1 año ago | 1 answer | 0
1
answerQuestion
Is there a 'value range' of INITIAL CENTROIDS for kmeans and kmeans ++?
Hi, We know that the initial centroids are randomly generated for Matlab's default 'kmeans' function. I wonder whether th...
más de 1 año ago | 1 answer | 0
1
answerQuestion
How to draw circle in a 3D space?
Hi, I would like to draw 2 circles. One in plane [P1 P6 P5], the other in plane [P1 P8 P5]. RGB values of points P1, P5,...
más de 1 año ago | 2 answers | 0
2
answersQuestion
Initial centroids for K-means clustering
If I have an array (i.e., 5 by 3 matrix) can serve as the initial centroids for kmeans clustering, how can I properly initialize...
más de 1 año ago | 1 answer | 0
1
answerQuestion
How to save the image WITHOUT the white background using imwrite (advanced problem)
Hi RGB = imread('bird1.png'); figure imshow(RGB) Then I get: Then: s = size(RGB); rectangle('position',[1 1 s(2) s(...
más de 1 año ago | 2 answers | 0
2
answersHow to add box to an image?
clear close all clc RGB = imread('bird1.jpg'); s = size(RGB); figure imshow(RGB); rectangle('position',[1 1 s(2) ...
más de 1 año ago | 0
Question
How to add box to an image?
Hi I have two images ('yellow.png' and 'bird.png'). See below. How can I make a box AROUND...
más de 1 año ago | 4 answers | 0
4
answersQuestion
Why my 'bboxes' and 'scores' variables are all empty while certainly my image contains a person?
Hi, This is my example image clearly with a person in it. I would like to use Matlab's 'people detector' to detect the p...
más de 1 año ago | 2 answers | 1
2
answersQuestion
How to identify skin or detect human or skin in an image using Matlab (detection problem not recognition problem) ?
Hi, I would like to detect whether there is any human or just skin in an image using Matlab. It doesn't have to be the face t...
más de 1 año ago | 0 answers | 0
0
answersQuestion
Text Analytics Toolbox seems making lots of mistakes on recognizing language and PartOfSpeech
Hi, My input is a list of VERY BASIC ENGLISH words shown below. I would like to find out the part of speech of them. k...
más de 1 año ago | 1 answer | 0
1
answerQuestion
How to parse noun and adjective words from an array of texts
Hi I have an array (n x 1) of strings. See example below. 'I thought about illness' 'I think I associated it with fresh or ...
más de 1 año ago | 0 answers | 0
0
answersQuestion
Any possibilities of using sortrows for strings
Hi, I have a cell named 'b' consisted of n by 1 of strings, each row in a cell is a string. See below. The 1,2,3,4 is n...
más de 1 año ago | 1 answer | 0
1
answerQuestion
Saving texts read from edit box in GUI
Hi, I have a edit box in GUI design. This edit box is specifically for puting texts/strings in rather than numbers. So I ...
más de 1 año ago | 0 answers | 0
0
answers
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