Professor of Mathematics

Grand Valley State University

Allendale, Michigan

Professional Interests: optimization; support vector machines

Answered

Looking for an efficient way of finding elements in a cell array of character vectors

Thanks very much. The ismember will return a logical array. If I tack on the find command, I get the desired indices as well: f...

Looking for an efficient way of finding elements in a cell array of character vectors

Thanks very much. The ismember will return a logical array. If I tack on the find command, I get the desired indices as well: f...

8 meses ago | 0

Question

Looking for an efficient way of finding elements in a cell array of character vectors

I have a cell array of character vectors, named "Channels", in which each entry corresponds a particular EEG channel label. I'd ...

8 meses ago | 2 answers | 0

Question

Error message when plotting network graph in 2018a

I'm having a problem creating a simple network graph from a symmetric adjacency matrix. A=[0,1,1,0,0;1,0,1,0,0;1,1,0,1,1...

11 meses ago | 2 answers | 0

Question

digraph plot bug in 2018a?

I've tried creating and plotting a simple digraph as follows: G = digraph([1 1], [2 3]); e = G.Edges; G = addedge(G,2,3...

alrededor de 1 año ago | 1 answer | 0

Answered

Sendmail and attaching images

Thank you so much. Am I correct that your code prompts the use to specify the attachment directory, as described below the line ...

Sendmail and attaching images

Thank you so much. Am I correct that your code prompts the use to specify the attachment directory, as described below the line ...

más de 1 año ago | 0

| accepted

Question

Sendmail and attaching images

I'm encountering a problem when using sendmail to include an image attachment. I have sendmail set up so that it works. When I h...

más de 1 año ago | 3 answers | 0

Question

How do I extract a portion of a string after a prescribed symbol?

I have a string of the form mystring='C\users\me\data\mymatrix.mat' What operation will permit me to create the string con...

más de 2 años ago | 1 answer | 0

Question

How to find occurrences of a vector of strings in a cell string.

I have a cell string, named Channels, that lists 69 distinct EEG channels, A1, A2, ... To find an occurrence of a particular ...

más de 2 años ago | 1 answer | 0

Question

How do I enumerate a family of 0-1 matrices

I'm trying to generate the family of all 10-by-3 matrices, where each matrix in the family, call it S, has the property that S(i...

alrededor de 3 años ago | 0 answers | 0

Question

How do I apply a multiple comparison method to linear mixed effect model results?

I have a data file (available for download at http://www.bodowinter.com/tutorial/politeness_data.csv and based upon the research...

más de 3 años ago | 2 answers | 0

Question

How to combine linear mixed model results across different test subjects?

Suppose I have three test subjects and for each I have collected data and formulated a linear mixed-effects model using fitlme. ...

más de 3 años ago | 0 answers | 0

Question

How to combine linear mixed model results across different test subjects?

Suppose I have three test subjects and for each I have collected data and formulated a linear mixed-effects model using fitlme. ...

más de 3 años ago | 0 answers | 0

Question

What is the best way to create and implement a Kaiser bandpass filter subject to certain specified conditions?

I'm trying to create and implement a 100-300 Hz bandpass filter as described in a signal processing research article. Specifical...

más de 3 años ago | 1 answer | 0

Question

How can I find multiple strings in a cell array?

I have a cell array of strings, called Channels, each containing an EEG channel label, e.g. 'A1', 'A2', ...., I'd like to fi...

más de 3 años ago | 2 answers | 1

Question

Using the "find" command with arrays of cells

I have 91-by-1 cell array, named "Channels," in my workspace whose entries correspond to EEG channels. For example, Channels{...

alrededor de 4 años ago | 1 answer | 0

Question

4-D Matrix Indices Corresponding to an Entry Inequality

I have a 4-dim matrix, A, of size say 10-by-10-by-200-by-30. I would like to find all 4-tuples [i,j,f,t] for which A(i,j,f,t...

más de 4 años ago | 1 answer | 0

Question

How do I convert a cell array of char to a single plot title?

I have a 3-by-1 cell, call it "labels," each of whose entries is a char. For example, labels{1,1}=A1,A2,A3 labels{2,1}=B1,B2,B...

más de 4 años ago | 1 answer | 0

Question

Building mex files on Mac Yosemite OSX.

I have some .C files associated with a toolbox I recently downloaded. My C compiler is XCode 6.2 and I'm running Yosemite OS 10....

más de 4 años ago | 1 answer | 0

Question

Axes resolution problems using VideoWriter

I'm facing some issues trying to improve the resolution of graph axes when creating an .avi file. Each frame in the file consist...

más de 4 años ago | 0 answers | 1

Question

Converting matrix entries satisfying a threshold condition.

I have a matrix of numeric entries and wish to convert each entry above a specified threshold to one and all other entries to ze...

más de 4 años ago | 1 answer | 0

Answered

Plotting tool for weighted digraphs

Thanks so much. I just tried out the gplotcolor.m and feel it shouldn't be too hard to visually convey the weight magnitudes by ...

Plotting tool for weighted digraphs

Thanks so much. I just tried out the gplotcolor.m and feel it shouldn't be too hard to visually convey the weight magnitudes by ...

más de 4 años ago | 0

Question

Plotting tool for weighted digraphs

I'm looking a tool to plot a weighted, directed graph, specifically one represented by a 44-by-44 matrix having nonnegative entr...

más de 4 años ago | 3 answers | 0

Question

How to compute the Instantaneous Power Spectrum ???

I'm looking for a means of computing the *instantaneous* *power spectrum* (IPS) of a signal, as described in the master's thesis...

alrededor de 5 años ago | 0 answers | 0

Question

Determining indices upon which a sequence of real numbers is convex

I have a vector, X, of real numbers which has a minimum at index k, where 1<k<n. I want to determine the smallest index k1 an...

más de 5 años ago | 1 answer | 1

Question

Colormap with Image command

I'm trying to plot intensity levels from an 8-by-8 matrix A whose values vary from 0 to 1. As a start, I entered the following, ...

casi 6 años ago | 1 answer | 0

Question

Plotting time-course of matrix entries

I have a matrix with real-valued, nonnegative entries. For entry (i,j), I wish to plot a filled circle at the point (i,j) whose ...

alrededor de 6 años ago | 1 answer | 0

Question

Averaging values in rank orderings with repeats

I'm wondering if there is a straightforward way for me to complete the following task. Suppose u=[1,3,2,2,4,7,2,5] and I wish...

alrededor de 6 años ago | 1 answer | 0

Question

Does anyone know of a simple script for performing the Hinkley-Page Cumulative Sum Algorithm?

I'm looking for a basic implementation of the Hinkley-Page Cumulative Sum Algorithm ('CUSUM') for automatic detection of change ...

más de 6 años ago | 0 answers | 0

Question

Syntax for Computing the Complex Morlet Wavelet of a Discrete Signal

I'm trying to find the easiest way to compute the complex continuous Morlet transform of a discrete signal. If x is my signal, I...

casi 7 años ago | 0 answers | 0

Question

Computing the Spectral Density Matrix of a Multivariate Time Series

I'm fairly new to signal processing, and I have a multivariate time series whose spectral density matrix I wish to compute using...

casi 7 años ago | 0 answers | 1