Possible Duplicate: Plotting data on time (date) axis in matlab hi, I have 2 column vectors in matlab (I imported the data from excel). the first one is called textdata which contains a list of dates and times as string format: textdata = '1/11/2010 11:40:04 AM' '1/12/2010 11:40:04 AM' '1/13/2010 11:40:04 AM' the ...
Hello, Let's say I have 9 MxN black and white images that are in some way related to one another (i.e. time lapse of some event). What is a way that I can display all of these images on one surface plot? Assume the MxN matrices only contain 0's and 1's. Assume the images simply contain white lines on a black background (i.e. pixel valu...
Hi everyone, Im using matlab and am having some difficulty. I am trying to swap the columns of one matrix (A) with the column of another matrix (B). For Example: A = 4 6 5 7 8 4 6 5 9 1 0 0 0 1 0 0 0 1 B = 1 0 0 0 0 0 0 1 0 ...
I am using MATLAB and having some issues formatting the output of a matrix. Currently, the matrix looks like: Columns 1 through 7 4 6 5 1 0 0 0 7 8 4 0 1 0 0 6 5 9 0 0 1 0 1 0 0 0 0 0 -1 0 1 0 0 0 ...
Hello, I am looking for some suggestions on how to approach the following computer vision problem. Below are 4 samples of an eye tracking dataset that I am working with. I would like to write code takes one such image and calculates the (x,y) position of the center of the pupil. I am currently using MATLAB, but I am open to using other ...
How do I compute the perspective correction by scaling factor in MATLAB based on height or attitude, i.e. assuming that when I am moving upwards, an area, say a square should shrink or expand if I were to descend. There are 2 scenarios for this: Case I: using imresize(), however how do I determine the scaling factor proportional to...
EDIT: I figured it out. Just did not understand notation. Hello, Hopefully someone out there is familiar with the clustergram in the bioinformatics toolbox. I am interested in the graphical aspects of the function (the dendrogram/heat map), but am currently handicapped as it requires me to use Matlab's cluster() function. I would prefe...
I use zeros to initialize my matrix like this: height = 352 width = 288 nFrames = 120 imgYuv=zeros([height,width,3,nFrames]); However, when I set the value of nFrames larger than 120, MATLAB gives me an error message saying out of memory. The original function is [imgYuv, S, A]= changeYuv(fileName, width, height, idxFrame, nFram...
I would like to plot how the amplitude and orientation of a 2D vector evolves over time. To do this I would like to create a graph reminiscent of the canonical E & B field graphs you may recall from an introductory electricity and magnetism class. Specifically, I would like to connect my 2D vector points with a ribbon, so that they ...
I have two patch plots on the same graph. One is red and the other blue. Is it possible to make the overlap purple? ...
I have two subplots. One is 3D and rotation is useful, but the 2nd is 2D and I keep accidentally rotating it which is really annoying. Is it possible to only allow rotation of one subplot? ...
When using fprintf to convert floats to text in a decimal representation, the output is a series of decimal digits (potentially beginning with 0). How does this representation work? >>fprintf('%tu\n',pi) >>1078530011 >>fprintf('%bu\n',pi) >>04614256656552045848 Apologies if this is very trivial; I can't find an answer elsewhere, in ...
Hi everyone, I have some code below, and I cant seem to get the matrices formatted correctly. I have been trying to get the matrices to look more professional (close together) with \t and fprintf, but cant seem to do so. I am also having some trouble putting titles for each columns of the matrix. Any help would be much appreciated! cle...
i have an arry lets say A=[2 3 4 5 6 7 8 9] i want to get middle point like B=[5] how to do it? ...
Hi ppl. I'm currently working on storing pixels in XML format using Matlab. The problem is that I have no idea about data storage under XML. Can any expert please give me some guidelines? Any relevant materials are welcome and appreciated. Thanks!! ...
For this picture: How do I make filter that returns true on brown color (insect) and false on background? ...
I have: img = imread('pic.jpg','jpg'); r = img(:,:,1); g = img(:,:,2); b = img(:,:,3); subplot(3,1,1); imhist(r); subplot(3,1,2); imhist(g); subplot(3,1,3); imhist(b); How can I change colors of the histogram to Red, Green and Blue? How can I change size of window tha appears? EDIT: Luis Miguel's answer regarding size of window work...
I have: img = imread('pic.jpg','jpg'); r = img(:,:,1); g = img(:,:,2); b = img(:,:,3); figure, imshow(r); figure, imshow(g); figure, imshow(b); How to set title over each picture? ...
Hi, I am having issues manipulating a matrix. Any help would be much appreciated! Say I have a matrix: xb = 1.00 2.00 3.00 6.00 5.00 9.00 and another matrix: cb = 3000.00 4000.00 4000.00 0 0 0 Is there a way to code somet...
I am new to using MATLAB, and I came across some syntax about colon that I don't fully understand. First Question: The expression: 0:pi/4:pi results in the answer: 0 0.7854 1.5708 2.3562 3.1416 Why is this the case? I thought that colon operator is used as a quick way to refer to indices so that we don't have to write out...