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Vectors

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Added: May 19, 2013 | Visits: 187

findFFT findFFT returns fft amplitude and frequency vectors from input data, with options to return normal fft, zeropadded fft, windowed fft, or both windowed and zeropadded to remove spectral leakage.IN data - vector containing information to perform fft on '-sampFreq',## - inputs sampling frequency of...



Platforms: Matlab

License: Freeware Size: 317.44 KB Download (18): findFFT Download

Added: July 20, 2013 | Visits: 213

RUNMEAN For vectors, Y = RUNMEAN(X,M) computes a running mean (also known as moving average) on the elements of the vector X. It uses a window of 2*M+1 datapoints. M an positive integer defining (half) the size of the window. In pseudo code: Y(i) = sum(X(j)) / (2*M+1), for j = (i-M):(i+M), and...





Platforms: Matlab

License: Freeware Size: 10 KB Download (20): RUNMEAN Download

Added: May 07, 2013 | Visits: 219

convlution matrix in four lines CONV_MTX Convolution matrix. If 'x' is a column vector of length 'nx', then conv_mtx(x,nh) gives a toeplitz matrix 'X' of size (nx+nh-1) times (nh). 'nh' is the length of the column vector 'h' with which 'x' is convolved. Thus finally 'X*h' is same as conv(x,h). If 'x' and 'h' are row vectors,...


Platforms: Matlab

License: Freeware Size: 10 KB Download (20): convlution matrix in four lines Download

Added: July 29, 2013 | Visits: 236

Gaussian Mixture Modeling GUI (GMM DEMO) The Expectation-Maximization algorithm (EM) is widely used to find the parameters of a mixture of Gaussian probability density functions (pdfs) or briefly Gaussian components that fits the sample measurement vectors in maximum likelihood sense [1]. In our work, the expectation-maximization (EM)...


Platforms: Matlab

License: Freeware Size: 573.44 KB Download (18): Gaussian Mixture Modeling GUI (GMM DEMO) Download

Added: April 23, 2013 | Visits: 326

Inverse Kinematic for 6DOF arm Anthropomorphic arm with 6 DOF and spherical wrist It calculates the Inverse Kinematic of an Anthropomorphic arm with 6 DOF. 'q' is the solutions in radiant and K is the direct Kinematic matrix. K = [ n s a p; 0 0 0 1] where n, s, a are three vectors fo 3 elements that represents the...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): Inverse Kinematic for 6DOF arm Download

Added: May 15, 2013 | Visits: 214

STRUCTURED TETRAEDRAL MESH GENERATION StructTetraMesh is a tool to build structured tetreaedral mesh on cuboid dataset. This is usefull in avoiding delaunay 3D triangulation that for this kind of dataset are particularly slow and numerically unstable.This tool allows a huge speed improvement against delaunayn for 3D points, the...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): STRUCTURED TETRAEDRAL MESH GENERATION Download

Added: April 24, 2013 | Visits: 269

Inverse Kinematic algorithm It calculates the Inverse Kinematic of an Anthropomorphic arm with 3 DOF. 'q' is the solutions in radiant and K is the direct Kinematic matrix. K = [ n s a p; 0 0 0 1] where n, s, a are three vectors fo 3 elements that represents the end-effector's orientation, and p is the desired end-effector...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): Inverse Kinematic algorithm Download

Added: July 08, 2013 | Visits: 248

Least-Squares optimal affine subspace The zip includes:(1) lsqAffineSpace: a 'low level' routine that takes a set of m-dimensional real sample data and returns the optimal-fit k-dimensional affine subspace, with some options for discarding outliers.(2) lsqPlane and lsqLine: lsqAffineSpace wrappers, that compute optimal line and...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): Least-Squares optimal affine subspace Download

Added: June 29, 2013 | Visits: 199

Natural Log Binning This function take the input of a data vector x, which is to be binned; it also takes in the amount bins one would like the data binned into. The output is two vectors, one containing the normalised frequency of each bin (Freq), the other, the midpoint of each bin (midpts).


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): Natural Log Binning Download

Added: May 29, 2013 | Visits: 215

Straight-line fitting genetic algorithm [M,B] = AG_RECTA(X,Y) finds the the slope M and the y-intercept B of the line that better fits to the X,Y data. X and Y are vectors of the same length.


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): Straight-line fitting genetic algorithm Download

Active Shape Model (ASM) and Active Appearance Model (AAM) This is an example of the basic Active Shape Model (ASM) and also the Active Appearance Model (AAM) as introduced by Cootes and Taylor, with multi-resolution approach, color image support and improved edge finding method. Very useful for automatic segmentation and recognition of biomedical...


Platforms: Matlab

License: Freeware Size: 9.88 MB Download (21): Active Shape Model (ASM) and Active Appearance Model (AAM) Download

Added: June 12, 2013 | Visits: 219

FFT2 optimization Many image processing applications require an extensive usage of FFT2 routine (or, in the most general case, a N-dimensional FFT) of matrices having the same dimensions. In these cases MATLAB FFT2 can result extremely inefficient. In general the execution time can be significantly reduced by...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): FFT2 optimization Download

Added: August 29, 2013 | Visits: 215

polyfitweighted Like polyfit.m but includes weighting of each data point.Summary----------------Find a least-squares fit of 1D data y(x) with an nth order polynomial, weighted by w(x).Usage-----P = polyfitweighted(X,Y,N,W) finds the coefficients of a polynomial P(X) of degree N that fits the data Y best in a...


Platforms: Matlab

License: Freeware Size: 10 KB Download (20): polyfitweighted Download

Added: July 28, 2013 | Visits: 214

State-machine simplex minimizer This is a single M-file that implements a Nelder-Mead simplex minimizer. It makes use of MATLAB's persistent variables to create a "state machine" implementation. This allows entire minimization programs to be written as MATLAB scripts, as it does not require a function to be defined and passed...


Platforms: Matlab

License: Freeware Size: 10 KB Download (20): State-machine simplex minimizer Download

Added: July 05, 2013 | Visits: 208

Constrained LLA to predict a chaotic time series 4 files are included in the package:(1) fs01.m - the 1st-order local linear approximation (LLA) very similar to algorithm by Farmer and Sidorowich (1987). Uses constrained linear least squares (lsqlin) and(2) ts1.m - to reconstruct the vectors of the state space.(3) Example.m - runs fs01 and ts1...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): Constrained LLA to predict a chaotic time series Download

Added: April 09, 2013 | Visits: 210

Back Propogation Algorithm The training input vectors and target vectors are read from files data1in and data1out respectively. The no of nodes in input and output layer is decided depending on the no. of rows in these datasets.The no of hidden layers, No of nodes in each hidden layer and the target error (put 0.1) is to...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): Back Propogation Algorithm Download

Added: July 01, 2013 | Visits: 229

C#, ActiveX Server Interfaces a C# generated dll to MATLAB using the COM interface. Currently the .NET platform is not supported by MATLAB as such to connect to C# requires the use of COM technology. The code makes an ActiveX server using C#, this server has a single event that functions in a similar way to the...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): C#, ActiveX Server Download

Added: March 25, 2013 | Visits: 209

grdwrite2 GRDWRITE2(X,Y,Z,'file.grd') will create a grid file containing the data in the matrix Z. X and Y should be either vectors with dimensions that match the size of Z or two-component vectors containing the max and min values for each. The file will be a COARDS-compliant NetCDF file, the standard...


Platforms: Matlab

License: Freeware Size: 10 KB Download (19): grdwrite2 Download

Added: April 24, 2013 | Visits: 180

INVDISTGRID INVDISTGRID Simple, robust gridding using inverse-distance interpolation. [Xi,Yi,Zi] = invdistgrid[X,Y,Z,dx] Grids values in vector Z with coordinates X and Y into an array with spacing dx using inverse-distance weighting (default power =2). All data between grid points are used in weighting. If...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): INVDISTGRID Download

Added: September 13, 2013 | Visits: 209

Plots a surface coloring by layers (using contour curves) Different elevations cannot be identified with standard matlab functions such as surf, even changing FaceColor attribute to activate interpolation. In contrast, with this function alows one can define contour levels and different colors are applied to each level.Instead of using surf(x,y,z), you...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): Plots a surface coloring by layers (using contour curves) Download

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