In MATLAB we can pick elements from a matrix using : operator. We can also pick elements in any sequence like for example picking elements like SubMat = Mat(1:2:end,1:2:end); % Sequential picking in rows and columns My question is how can we do this in OpenCV without explicitly looping over the Mat. Source: Windows Questions ..
Category : matlab
Can someone please translate a part of the following matlab code for welch method to C++? I do not know how I can do the compute its power part after calculating the FFT in C++. % loop over frequencies for wi=1:length(winonsets) % get a chunk of data from this time window datachunk = eegdata(winonsets(wi):winonsets(wi)+winlength-1); % ..
I need to implement the same logic and values we get in MATLAB using interp1 with ‘pchip’ or ‘cubic’ flags and I’m unable to find a fitting replacement in OpenCV other than implementing by myself the cubic interpolation in Numerical Recipes (as noted by another question, this is based on De Boor’s algorithm, which is ..
I want to create a special case of a room-impulse-response. I am following this implemetation for a room-impulse-response generator. I am also following this tutorial for integrating c++c with python. According to the tutorial: You want to speed up a particular section of your Python code by converting a critical section to C. Not only ..
if a Best Fit calculation routine finds Slope, intercept of linear regression of x and y, how to find residue?. – for (i=0;i<n;i++) y_fit[i]=Slope*x[i]+Intercept; residue = sum of all (y[i]-y_fit[i])*(y[i]-y_fit[i])?. Source: Windows Que..
I need to run a fortran (77) script from the Windows 10 command window, but it should be a one-liner. The reason is that the fortran scipt – a file called external_command.f – is actually part of a Matlab script, where I can run external code through the operating system’s command window (by using the ..
I am observing some weird behaviour when pinning (cudaHostRegister) memory managed by Matlab. My goal is to develop a MEX application that will first be initialized, and can be execute faster when called again with new data. The initialization stage: Pin/page-lock the memory from a Matlab array (using cudaHostRegister) allocate device memory (cudaMalloc) Then I ..
I have compiled a mex file using MATLAB. I am having trouble since every time I try to run the code, MATLAB crushes. I have tried using feval() function with a mexhost in order to separate the processes and debug, following this guide. When I am executing using feval(mh,’functionName’,input), all I am getting is: Invalid ..
I have a dataset within a .mat file that is a cell array filled with categorical arrays: yData is a 1×2 cell per say and within: {[1×4 categorical] [1×3 categorical]} and accessing the first cell: yData(1) = {1×4 categorical}. I am able to get the cells of yData but I’m not sure which function I ..
I’m having issues linking the mat.h file from Matlab to my c++ file. My portion where I’m including the directory for the .h file within my Makefile is here: set(MAT_ROOTDIR "/Applications/MATLAB_R2021a.app/extern/include") target_include_directories(onnxruntime_test PRIVATE ${MAT_ROOTDIR}) I simply #include <mat.h> within my cpp file, but I get this error: Undefined symbols for architecture x86_64: "_matClose_800", referenced from: ..
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