I have a textfile with the following structure: 1999-01-04 1,100.00 1,060.00 1,092.50 0 6,225 1,336,605 37 1999-01-05 1,122.50 1,087.50 1,122.50 0 3,250 712,175 14 ... The file contains repeated sets of eight values (a date followed by seven numbers, each on their own line). I want to read it into MATLAB and get the values into diff...
I have a series of numbers. I calculated the "auto-regression" between them using Yule-Walker method. But now how do I extend the series? Whole working is as follows: a) the series I use: 143.85 141.95 141.45 142.30 140.60 140.00 138.40 137.10 138.90 139.85 138.75 139.85 141.30 139.45 140.15 140.80 142.50 143.00 142.35 143.00 142...
I'm working with an image retrieval system using color histogram intersection in MATLAB. This method gives me the following data: a real number which represents the histogram intersection distance, and the image file name. Because they are different data types, I store them in structure array with two fields, and then I save this structu...
Hello, I am trying to aquire image using a camera connected to the Matrix Vision frame grabber in Matlab. However, when I type imaqhwinfo, I see the installed adaptors as 'coreco' and 'winvideo'. When I checked the device info, it says that that are no devices installed to the adaptor. The Matrix Vision frame grabber and camera has alrea...
Sometimes after calling a function (which takes some 30 odd minutes to finish), you realize that you did something wrong and want to stop the program. How do you do that in MATLAB? What I do is shutdown MATLAB completely and restart. I think there would be a way to abort the execution of the function instead. Anybody know what that is...
I have used the SIFT implementation of Andrea Vedaldi, to calculate the sift descriptors of two similar images (the second image is actually a zoomed in picture of the same object from a different angle). Now I am not able to figure out how to compare the descriptors to tell how similar the images are? I know that this question is not ...
I'm trying to get data from a server. Right now, I am polling the server every couple of seconds for the current values. I am wondering if it is possible to have Matlab get the data in real-time or if I am stuck with my current implementation. Has anyone done anything like this? If so, maybe you can tell me how you got started with it. ...
I have a file a.txt which is like: 0 0 0 3 4 3 0 0 3 0 3 4 0 1 0 4 4 4 0 1 3 1 3 5 0 2 0 5 4 5 0 3 0 0 4 0 These are vertices of triangles [x1 y1 x2 y2 x3 y3] that I need to plot on a 6x6 grid. I need to see these triangles on a single graph. How can this be done in MATLAB? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~...
Hi everyone, thats my first post, so please be kind. I have a matrix with 3~10 coordinates and I want to connect these points to become a polygone with maximum size. I tried fill() [1] to generate a plot but how do I calculate the area of this plot? Is there a way of converting the plot back to an matrix? What would you reccomend me...
I have some code that plots triangles in MATLAB. I need to be able to somehow execute this code from my C program which generates these points. Is that possible? How can it be done? Just a thought: Can I somehow embed MATLAB code in C, so that it can compile on a C compiler? ...
How does one solve the (non-trivial) solution Ax = 0 for x in MATLAB? A = matrix x = matrix trying to solve for I've tried solve('A * x = 0', 'x') but I only get 0 for an answer. ...
I have some 9000 points that are plotted on a graph: [Full resolution] Actually, the plot is not as smooth as I wanted it to be. Is there some way I can smoothen the graph to a required degree? Or some form of thresholding so that I can selectively smoothen out the parts that is too bumpy? I am not sure but can fast-fourier-transfo...
I have this plot [Full Resolution] I need to make a straight vertical line at a point on x axis that the user enters and show the coordinates of the intersection of that vertical line with my plot. How can this be done in MATLAB? for example: the user enters 1020 then a straight vertical line will be drawn at 1020 that meets the pl...
Hi, I want to call matlab in bash non-interactively and use its result outside Matlab. For example, I have a script test.m rand(3,4) quit When I execute in bash $ matlab -nosplash -nodesktop -nodisplay -r test Warning: No window system found. Java option 'MWT' ignored < M A T L A B (R) > Co...
Greetings, I am trying to find an easy way to manipulate an image so that I can decrease the quality of it from 8bit to 3bit. What would be the easiest way to achieve this? Cheers ...
Doing a couple rotations in Matlab, one which is rotation about the y-axis, however online I've found two different answers: here and here. Which is correct, if both how does one get to the other? ...
When I run the following code: xdata2 = [1 3 4 5]; ydata2 = [3 9 76 73]; params = [0.1 0.5 0.0 -0.5 0.2 0.8]; y = svenssontest2(xdata2,ydata2,params,0.636,1.9632); I get the error message "Too many input arguments", but the number of input arguments is correct. Here's the code for the function svenssontest2: function [alpha L1 L2] = ...
I am trying to load an xls file in MATLAB. The xls file contains numerical values. I have successfully loaded and plotted the file but if I change the dimensions of the file (i.e. number of rows and number of columns) there is an error: Numeric = xlsread('Test_results_new') ??? No appropriate method or public field UsedRange for class I...
Is it possible to detect eye in the video mode in MATLAB? I am trying to detect the eye and make some predictions based on the movement of the eye. But am not sure on how to do that. Can someone help me in how to start about that? Thanks in advance. ...
I want to plot a heart shape in framework as shown in the following image (found on the website zedomax.com/blog/2008/09/03/i-love-meth-t-shirt/): I have tried to make it by using this MATLAB program: n=100; x=linspace(-3,3,n); y=linspace(-3,3,n); z=linspace(-3,3,n); [X,Y,Z]=ndgrid(x,y,z); F=((-(X.^2) .* (Z.^3) -(9/80).*(Y.^2).*(Z.^3...