Indices Maths

The iStocks Widget displays quotes and historical charts for international stocks, indices, currencies, futures and mutual funds. It uses the symbols from Yahoo Finance. Localization available for German, French and Italian. What's new in this version: Sorting by performance; multiple instance...

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Sequenzetto is a utility for reordering files in a given folder by prefixing their filenames with appropriately formatted indices. To use the utility first find the folder by clicking the button labelled "Choose Folder..." to navigate and sele


Platforms: Mac

This script has the next actions: finds the set of elements in input_array that are closest to elements in target_array and records the indices of the elements in target_array that are within tolerance, tol, of their closest match. Also it records the indices of the elements in target_array...


Platforms: Windows, Mac, *nix, Python, BSD Solaris

In many filtering problems one receive not just a single measurement, but a set of measurements at each time step. The most straightforward way of dealing with such variable cardinality entities in Matlab is to store them in cell arrays, but for various reasons the user may not want that. The...


Platforms: Matlab

The function implement the 1D Walash Transform which can be used in signal processing,pattern recognition and Genetic algorithms. The Formula of 1D Walsh Transform is defined as : N-1 q-1 ---- -- 1 | | b[i](m)*b[q-1-i](u) W(u) = --- / f(m)| | (-1) ,u = 0,...,N-1 N ---- | | m=0 i=0 where for...


Platforms: Matlab

% also incorrectly known as Shannon-Weaver,is one of% several diversity indices used to measure versity% in categorical data. It is simply the Information% entropy of the distribution, treating species as% symbols and their relative population sizes as the% probability.% The advantage of this...


Platforms: Matlab

This function treats a matrix as a column-wise set of signals and circularly shifts each column so that it aligns with the first column of data so that the inner product between those columns is maximized with respect to all other shifts. USAGE:[dataout,lagout]=xcorAlign(data);If only 1 output is...


Platforms: Matlab

Clipping is the main program. There are three inputs: y is the time record, threshhold_value is the clipping threshhold, and threshhold_samples is the number of consecutive data points exceeding the threshhold_value to indicate that the data is clipped.The program returns two cells arrays...


Platforms: Matlab

Most PID tuning rules are based on first-order plus time delay assumption of the plant hence cannot ensure the best control performance. Using mordern optimization techniques, it is possible to tune a PID controller based on the actual transfer function of the plant to optimize the closed-loop...


Platforms: Matlab

D = DISTMAT(X,Y) for matrices X and Y returns the distance matrix where the (i,j)th entry is the d-norm distance between the ith and jth row of X and Y respectively.DISTMAT(X,Y,d) computes a specific d-norm distance. Default=2[D,XI,YI]=DISTMAT(X,Y,d,var) gives the indices of the sorted values of...


Platforms: Matlab

Given element and nodal data, this routine can be used to refine the selected elements. Only 4-node tetrahedron elements are allowed. During the refinement, only the edge which is the longest one of all the elements that share it will be cut, otherwise, recursive search will be performed in...


Platforms: Matlab

Function to solve the Minimum Perfect Matching on non-biparite graphs problem using Integer linear programming.Returns vector of matched indices and cost of the match. Requires symmetric adjacent matrix of even rank. function [ indices, cost ] = min_perfect_matching( G )Function _requires_...


Platforms: Matlab

The characterisation of the downsampler block can be done by the formula:y(n)=x(nM)Syntax:[y ny]=downsampler(x,n,M)x is an input sequence over indices specified by n.L is the downsampling rate.It ignores (M-1) samples between kth sample and (k+M)th sample.y is the output sequence over indices...


Platforms: Matlab

This program gets the stock symbols of a user-defined index (NASDAQ, NYSE, AMEX, OTCBB, LSE) and/or sector. The data is retrieved from http://www.eoddata.com/ and from Yahoo Finance.For example: - get_stock_symbols('NASDAQ') : gets all stock symbols from NASDAQ -...


Platforms: Matlab

Where several instruments record a time-series of data with a common time record, quality control and despiking of the data is often linked between the instruments. This function allows a variable number of datasets (with a common time record) to be plotted and scrolled through. Bad data can be...


Platforms: Matlab

This is a collection of functions I wrote for use of MATLAB with tree-ring time series. Functions are included for skeleton plotting, group time-series plotting, and correlation analysis of seasonal climatic time series with tree-ring indices ("tree-ring response-functions").


Platforms: Matlab

Computes region adjacency graph of a labeled 2D or 3D image.Two regions are considered as neighbor if they are separated by a background (i. e. with color 0) pixel in the horizontal or vertical direction, as well as depth direction for 3D images.The result is a N*2 array, containing 2 indices for...


Platforms: Matlab

Computation is vectorized, no loops% H = gui_comp_h_tet4( id, ix, x)%-----------------------------------------------------------% compute the heights for the nodes of selected elements% WZ. Shan, 23/01/09%-----------------------------------------------------------% input:% ix : elem. con. mat....


Platforms: Matlab

function [i,i_] = fgridmin(y)% Search an N-dimensional array y for points that may be proximate to a global minimum% of the interpolated array; return the proximate points' N-D subscripts (i) in y. Also% optionally return the subscripts (i_) for discrete local minima in y.%% syntax:% i =...


Platforms: Matlab