# Paul Fishback

### Grand Valley State University

Professor of Mathematics

Grand Valley State University

Allendale, Michigan

Professional Interests: optimization; support vector machines

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**Content Feed**

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...

mer än 4 år 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 ...

mer än 4 år ago | 2 answers | 0

### 2

answersQuestion

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...

nästan 5 år ago | 2 answers | 0

### 2

answersQuestion

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...

ungefär 5 år ago | 1 answer | 0

### 1

answerSendmail 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 ...

mer än 5 år 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...

mer än 5 år ago | 3 answers | 0

### 3

answersQuestion

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...

mer än 6 år ago | 1 answer | 0

### 1

answerQuestion

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 ...

mer än 6 år ago | 1 answer | 0

### 1

answerQuestion

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...

ungefär 7 år ago | 0 answers | 0

### 0

answersQuestion

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...

mer än 7 år ago | 2 answers | 0

### 2

answersQuestion

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. ...

mer än 7 år ago | 0 answers | 0

### 0

answersQuestion

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. ...

mer än 7 år ago | 0 answers | 0

### 0

answersQuestion

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...

mer än 7 år ago | 1 answer | 0

### 1

answerQuestion

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...

mer än 7 år ago | 2 answers | 1

### 2

answersQuestion

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{...

ungefär 8 år ago | 1 answer | 0

### 1

answerQuestion

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...

mer än 8 år ago | 1 answer | 0

### 1

answerQuestion

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...

mer än 8 år ago | 1 answer | 0

### 1

answerQuestion

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....

mer än 8 år ago | 1 answer | 0

### 1

answerQuestion

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...

mer än 8 år ago | 0 answers | 1

### 0

answersQuestion

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...

mer än 8 år ago | 1 answer | 0

### 1

answerPlotting 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 ...

mer än 8 år 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...

mer än 8 år ago | 3 answers | 0

### 3

answersQuestion

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...

ungefär 9 år ago | 0 answers | 0

### 0

answersQuestion

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...

mer än 9 år ago | 1 answer | 1

### 1

answerQuestion

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, ...

nästan 10 år ago | 1 answer | 0

### 1

answerQuestion

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 ...

nästan 10 år ago | 1 answer | 0

### 1

answerQuestion

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...

ungefär 10 år ago | 1 answer | 0

### 1

answerQuestion

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 ...

mer än 10 år ago | 0 answers | 0

### 0

answersQuestion

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...

nästan 11 år ago | 0 answers | 0

### 0

answersQuestion

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...

nästan 11 år ago | 0 answers | 1