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Raldi

Technological Educational Institute of Athens

Active since 2011

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Question

Best way of drawing multiple circles and updating their position
What is the best way to draw a variable number of circles in a plot and update their position? I have tried F = rectang...

4 years ago | 3 answers | 0

3

Question

Define an ellipse with a given angle and find if a point lies inside its boundaries

4 years ago | 1 answer | 0

1

Question

Update viscircles position in an interactive plot
I am creating a circle at a specified position using F = viscircles([Xposition Yposition], radious); Later on the code...

4 years ago | 0 answers | 0

0

Question

Plot a moving dot inside a quiver plot that is constantly being updated
I have the following code that will create a quiver plot (imagine a team of players in a football game) and I would like to upda...

4 years ago | 1 answer | 0

1

Question

Find neighboring nodes in a list of node positions
I have two vectors of X and Y positions x = randn(10,1); y = randn(10,1); So *x(1)* with *y(1)* together make the po...

4 years ago | 2 answers | 0

2

Question

How to compute softmax and its gradient?
I am creating a simple two layer neural network where the activation function of the output layer will be softmax. I have thi...

5 years ago | 0 answers | 1

0

Question

Get bits of number.
I have a _16 bit_ double I got from using *wavread* that I want to get the first _8 bits_ from. As an example lets say I hav...

7 years ago | 1 answer | 0

1

Question

Function similar to isnan for zeros
Is there a function that does what isnan does but with zeros?

7 years ago | 1 answer | 0

1

Question

Create black columns/rows in image.
Hi everyone, I have an image and I want to only keep visible small patches of lets say 8x8 alternatively. So I start at th...

7 years ago | 2 answers | 0

2

Question

Find struct size in bytes.
Hi all, I have a struct element that contains some vectors and another struct that in it's turn contains some more data. What...

8 years ago | 1 answer | 0

1

Question

Matrix indexing, getting back my original matrix.
Hi, I have a matrix mat= [ 1 2 3 4 5 6 7 8 9; ... 1 2 3 4 5 6 7 8 9; ... 1 2 3 4 5 6 7 8 9; ... ...

8 years ago | 2 answers | 0

2

Question

Correct way of using blockproc
I have a matrix, and a function similar to function val = name(matWin, a, b, c) What is the right way of calling _blockp...

8 years ago | 1 answer | 0

1

Question

Quickly create a vector of ones and zeros
My question is if there is a way to create a vector of zeros vec = 0 0 0 0 0 0 0 0 and specify a position lets s...

8 years ago | 5 answers | 0

5

Question

Apply function to image window.
Hi all, After reading an image and converting it to gray I want to apply a simple function I created est = findest(seg...

8 years ago | 0 answers | 0

0

Question

Using a base bigger than 36
Hi everyone, Do you know how can I possibly transform a vector that could be _base2_ , _base7_ , but also bigger like _base1...

8 years ago | 1 answer | 0

1

Question

Matrix with all possible value combinations
Hi everyone, I have a quick question. Lets say i want to form a matrix with all possible combinations of some acceptable valu...

8 years ago | 1 answer | 2

1

Question

Import .csv that has the characters '-'
I have an .csv file as you can see below and was wondering how to import it into matlab. 'csvread' wont work from what I've tr...

8 years ago | 1 answer | 0

1

Question

Use abslolute colormap scale.
Hi everyone, I have a quick question. Lets assume that we have a two dimentional matrix and each of its values represents the t...

9 years ago | 1 answer | 0

1

Question

How to use an absolute scale with colormaps
Hi everyone, I am using image to plot a matrix of some heat data, the thing is that i want a specific color mapped in a spec...

9 years ago | 1 answer | 0

1

Question

Stop a while loop using a GUI
Hey everyone, I need to stop a while loop using a 'Stop' button in a GUI and i was wondering what are the best ways of doing...

9 years ago | 3 answers | 0

3

Question

Dynamicaly show size of imrect
Hi guys, I wanted to know is there a way to make imrect show its x and y length while the user is moving it inside the axes. ...

9 years ago | 1 answer | 1

1

Question

Make button down function work for objects inside axes.
Hi, I have a quick question, I am using the "WindowButtonDownFcn" in order to get the location i clicked inside an axes object...

9 years ago | 1 answer | 1

1

Question

Matlab GUI problem with multiple panels
Hello, I have created this big GUI(not using guide) that has 3 main panels, each one of them with different axes and buttons....

9 years ago | 1 answer | 0

1

Question

Compute average of each value in a matrix without using for
Hi all, I was wondering is it possible to alter each value of a matrix based on the average value of its neighbors, wihtout u...

10 years ago | 1 answer | 0

1

Question

Use a nx2 matrix to indicate desired positions on another matrix
Hello everyone, I have a quick question, how can i use the matrix lets say pos = [1 2; 3 3]; as a guide to change the...

10 years ago | 1 answer | 0

1

Question

Update a text object's position used with a movable rectangle.
Quick question, Lets say i have created a rectangle using h(i) = imrect(gca, [1,1,4,4]); and then i add a text object ...

10 years ago | 1 answer | 0

1

Question

How to pass values into addNewPositionCallback
Hey guys, I am using the following line of code id(i) = addNewPositionCallback(h(i),@updateFun); but when i try to mo...

10 years ago | 0 answers | 0

0

Question

How can i know what object created with imroi did i move
Lets say i create a bunch of rectangles usind the following way for i = 1:2 h(i) = imrect(gca, compdata(i,:)); ...

10 years ago | 1 answer | 0

1

Question

Pass variables into set(frt,'WindowButtonDownFcn',@mousePos)
Quick question, how can i pass some other variables that i want in mousePos function mousePos(hObject,~) mPos=get(hObjec...

10 years ago | 2 answers | 0