Question

Camera measurements after calibration
Hi all, I have calibrated a camera successively using the calibrator app and a checkerboard pattern. I plan to use the camera...

nästan 10 år ago | 1 answer | 0

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how can calculate power spectral density from data (999*1)
If you have signal processing toolbox you can use the function, pwelch. Look in the documentation for it

nästan 10 år ago | 0

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Problem in data interpolation over different grids
Try repmat like this: obscon = repmat(obscon,128,1);

nästan 10 år ago | 0

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Problem in data interpolation over different grids
Hi Look in the documentation for interp2. I think you need to use the meshgrid function on your vectors to form matrices used...

nästan 10 år ago | 1

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FFT of tidal data - problems identifying Mf component in MATLAB
Hi, Have you tried to plot the power spectral density instead? If you provide the sampling frequency you can get better insig...

nästan 10 år ago | 0

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How to declare a function having bounds ?
function f=fcn(x) if x<0 y = 0; else if x>=0 && x<1 y = x; else if x>1 y = -1; end I...

nästan 10 år ago | 0

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Kalman filter and bounding box tracking
Hi, Do you have computer vision toolbox? There is vision.KalmanFilter method there you can use.

nästan 10 år ago | 0

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How common is MATLAB in academia?
Within my field (Energy technology and Multiphase flow) I saw authors of scientific papers refering to matlab code provided whic...

nästan 10 år ago | 0

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How common is MATLAB in academia?
Hi, From you name I guess you are Swedish?! I can tell you that at Chalmers Matlab is more or less standard.

nästan 10 år ago | 0

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Error using loadlibraryin mex file
Is the lib file "libcublas" in your path? Have you told the complier (mex) where to find the file? Usually you need to suppl...

nästan 10 år ago | 0

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Matrix must be a positive definite (geometry problem)
Hi, If you are sure the problem is set up correctely you can solve with the general solver: Z = A\B; Chol can only be u...

nästan 10 år ago | 1

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How to draw centroid that include the value inside bounding box?
Hi Use the vision.BlobAnalysis method. It returns both bounding box and centroid.

nästan 10 år ago | 0

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GPU amount of availible shared memory is less that it is seemed to be
Hi, I tried your code with A=magic(5000); It works on my Gpu. I am using a Nvidia Geforce GT 640M, with 2 GB memory. What f...

nästan 10 år ago | 0

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error I did not understand it?
The function scatterd is not a standard matlab function, do you mean scatter(d)? Is it a function you made? Is it in the correct...

nästan 10 år ago | 0

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My equation gives only one value for 1x200 vector variables
Hi You forgot the . symbol when doing elementwise operations. Try this instead: R_p = ((n_t*cos(theta_i)-cos(theta_t))./(c...

nästan 10 år ago | 0

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Why does filtfilt provide me wrong results?
Why do you write dfCoeff = double(LPsig); Everything is double precision already. Call the filter function like Filter...

nästan 10 år ago | 0

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Help understanding the error on 2-d ballistic trajector
Yes, write i=1; in between loops

nästan 10 år ago | 0

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error I did not understand it?
You have a space between the name and the argumment, scatterd (p); write scatterd(p);

nästan 10 år ago | 0

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Help understanding the error on 2-d ballistic trajector
Hi You need to reset your counter i in between the loops. When the fist while loop finish (y2>=0 condition is met) the value of...

nästan 10 år ago | 0

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Need with help with error on Newton's Method function
Hi, You cannot pass a symbolic variable to your functions in that way. Since you have you function and its derivative you can...

nästan 10 år ago | 0

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Making a movie from images
Hi, Reading the error message there is an error when you are using the function im2frame, which is called on line 13. What...

nästan 10 år ago | 0

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Rename images using counter
You can use num2str() to convert the loop index to a string. With strcat() you can combine 2 strings such as A and loopindex ...

nästan 10 år ago | 0

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Which video cards suitable for testing CUDA functionality
Hi, Check this: http://se.mathworks.com/discovery/matlab-gpu.html Check Nvidia cards specs. for their compute capabilit...

nästan 10 år ago | 0

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Subscript indices must either be real positive integers or logicals.
Check the values of pixel_location(1) and pixel_location(2). I guess you find either the value 0 or a decimal value. Indexes hav...

nästan 10 år ago | 0

Question

Can I convert a system of equations with a Toeplitz matrix to a system with a circulant matrix?
Reading the following post it seems that it is possible to zero pad a Toeplitz matrix to a circulant. http://scicomp.stackexc...

nästan 10 år ago | 1 answer | 1

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advice on Image acquisition & near real time processing
Hi Yale, Do you have Image Acquisition toolbox? There is a function (Matlab) called: imaq.VideoDevice Look in the documenta...

nästan 10 år ago | 1

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How can i acess to created objects out of the class
Don't you have to pass the "Milch" variable to the function PriceProducts? I don't see how the function gets this value otherwis...

nästan 10 år ago | 1

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what is mean by image gradient? what is mean by gradient filter ?
I agree with Mr Simon, look online. But to summarize image gradients are commonly used to detect edges in images. Look on wikipe...

nästan 10 år ago | 0

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advice on Image acquisition & near real time processing
Hi, Maybe you can get some ideas from this example: http://se.mathworks.com/help/imaq/examples/barcode-recognition-using-l...

nästan 10 år ago | 1

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Detection of Pressure Points Over a MATRIX.
Hi again! This function is much simpler to use http://www.mathworks.com/matlabcentral/fileexchange/25500-peakfinder/conten...

nästan 10 år ago | 0