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Alfonso


Universidad Politècnica de Valencia

Last seen: 5 years ago |  Active since 2018

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Question


Finding the error/difference between two 3D objects
I am trying to find the difference or error between two 3D models. The "error" I am trying to find would be defined as the exist...

6 years ago | 0 answers | 0

0

answers

Question


Converting 3D to 2D cloud of points
I am trying to convert a set of data which is a cloud of points from 3D to 2D, I am using this code: % Function from 3D t...

6 years ago | 1 answer | 0

1

answer

Answered
How to choose a random value from an array?
Take a look at this answer <https://es.mathworks.com/matlabcentral/answers/48852-choose-elements-from-array-randomly>

6 years ago | 0

Answered
How can I make my values become positive?
% Example: 3x2 array myArray = [-1,-2;-3,2;-3,-4]; % Make all values in array positive myArray = abs(myArray); %...

6 years ago | 0

| accepted

Question


Set y axis of image in imshow at the bottom without flipping the image
At the moment when I display the image with imshow the y axis are logically set with the origin at the top. I would like to know...

6 years ago | 1 answer | 0

1

answer

Question


Effect of depth in an echocardiography when retreiving distances of a segmented region
I have an echocardiography image where I want to segment a region inside it. At the moment I have been able to segment the part ...

6 years ago | 0 answers | 0

0

answers

Answered
How can i reorder NxM matrix into a 1D array
Without looping you can do: b = [a(end,:), a(end-1,:), a(end-2,:)]; % 1D array b = 7 8 9 4 5 ...

6 years ago | 0

Answered
Extracting a file path from a .txt file
Attending to the title of your question, in order to extract the full path filename of a file: % Select the file you want...

6 years ago | 0

Answered
I want to get the image I got in a function in another function
Try using the user data to save/load variables in different functions: function selectImage_Callback(hObject, eventdata, ha...

6 years ago | 0

| accepted

Answered
how to bold only one axis?
Look at this example: % Only put in bold X axis plot(randn(100,1)); title('X axis in bold'); xlabel('X axis','fontweig...

6 years ago | 1

Question


Perfectly fitting an image on a pushbutton of my GUI
I have created a GUI where I have two pushbuttons, I have embedded an image on these pushbuttons, but as you can see there are t...

6 years ago | 1 answer | 0

1

answer

Answered
How can I subtract 2 2D graphs made by vectors of different length?
If you want to quantify the "difference" between 2 datasets of different length, say dataset A with length 100 and dataset B wit...

6 years ago | 2

Question


Getting points with ginput from image and plotting simultaneously each selected point
I am trying to select an unlimited number of points from an image ([x,y] = ginput), and each time I select a point I want to plo...

6 years ago | 1 answer | 0

1

answer

Question


Passing a line through 2 determined points of a dataset automatically
I am trying to draw a line which cuts through approximately the middle of a cloud of points. The data sets have similar shape wi...

6 years ago | 1 answer | 1

1

answer

Question


Plot a line between 2 points and extend the line a determined distance
I am plotting a line between points: p1 and p2. Finally I want to extend this line a determined distance so it will still pass t...

6 years ago | 2 answers | 0

2

answers

Answered
delete rows in a table
Try this % define your table table_array = [1 2; 3 2; 4 0; 5 6; 1 0; 9 0]; % search index rows [index_row index_col] = f...

6 years ago | 1

Answered
I need to leave values in an array in blank. NaN problem
If you are saving all the water level values in an array 1xn or nx1 (a row or column vector) , you could delete the incorrect va...

6 years ago | 0

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Answered
How can I save 2D display view images of a 3D textured mesh from given view angles?
Take a look at this % 3D mesh (example) x = -2:0.25:2; y = x; [X,Y] = meshgrid(x); F = X.*exp(-X.^2-Y.^2); surf(X,Y,F)...

6 years ago | 0

| accepted

Answered
How to read file using textscan
Take a look here <https://es.mathworks.com/help/matlab/ref/textscan.html#btg0kes> You could try: filename = 'myFile.txt'...

6 years ago | 0

| accepted

Answered
Extracting lines from outer image.
An option would be using bwboundaries which obtains all the boundaries in the image. the variable boundary outputs the amoun...

6 years ago | 0

Answered
Join dots in binary image.
Take a look here <https://es.mathworks.com/matlabcentral/answers/122882-connecting-points-in-binary-image>

6 years ago | 0

Answered
How to convert from pixels to mm and from mm to pixels?
In order to obtain the number of pixels of the yellow line which you know it's real distance is 11.72 mm in the vertebral column...

6 years ago | 0

Answered
How to evaluate the height and width of an object in BW image
Try this % Get boundary bw = bwboundaries(binary_img); bw = bw{1}; bw_x = bw(:, 2); %columns bw_y = bw(:, 1); %rows ...

6 years ago | 0

Answered
How to plot figure from a stored file?
In order to combine the three graphs in a unique figure you could use subplot. figure % First set of data subplot(1,3,1...

6 years ago | 0

Answered
Difference between {} and []
A = {0,1,2} constructs an array of class cell, basically this type of class can contain any type of data. For further informatio...

6 years ago | 9

Question


Problem with bwboundaries in image processing
I am trying to do the next things: Objective: Find centroid and major axis of a set of x,y coordinates by using bwboundari...

6 years ago | 3 answers | 0

3

answers