Rank: 738 based on 96 downloads (last 30 days) and 19 files submitted
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Joshua Carmichael

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Personal Profile:

Geophysics graduate student. Research: Glaciology, seismology, applied functional analysis.
http://www.ess.washington.edu/~joshuadc

Professional Interests:
Hilbert Spaces, best basis projections, applied math, geophysics

 

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Files Posted by Joshua View all
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(last 30 days) 		Comments Rating
25 Jun 2010 day of year Date vectors converted to day of the year. Author: Joshua Carmichael julian day, calender, measurement, earth sciences, time, geophysics 30 4
  • 5.0
5.0 | 1 rating
13 May 2010 Screenshot D8 Algorithm for Hydrological Models Finds most likely locations for water channels given a potential Author: Joshua Carmichael d8, hydrology, glacial, earth sciences, general, d8 algorithm 6 0
03 May 2010 plotXmatrix.m Plots data on separate y-axes Author: Joshua Carmichael matrix, signal processing, time series, plot 3 0
03 May 2010 xcorAlign.m Shifts data by maximum cross correlation Author: Joshua Carmichael cross correlation, time series, matrix, circularly shifting, signal processing 6 1
  • 5.0
5.0 | 1 rating
03 May 2010 normColumns.m normalizes matrix columns Author: Joshua Carmichael normalization, time series, signal processing, matrix, norm, matching pursuit 4 1
  • 4.0
4.0 | 1 rating
Comments and Ratings by Joshua View all
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16 Oct 2011 Plot earth Plot earth in 3D Author: Bruno Luong

A nice utility. However, there are few bugs with the plot2dmap options. The field name is accidentally called plot2Dmap after the "lower" function is used, and hence a field value other than false for plot2dmap can never be implemented.
24 Mar 2010 fshift Shifts the elements of an array by a (possibly non-integer) given number of elements. Author: Francois Bouffard

Never mind, now that I have more carefully read your file, I see that covered the 2*pi factor in the frequency digitization and you are not forcing the signal to be real.
22 Mar 2010 fshift Shifts the elements of an array by a (possibly non-integer) given number of elements. Author: Francois Bouffard

Helpful.
Two comments:
(1) Is the frequency domain shift appearing as:

exp(-1i*s*pi*f)';

Suppose to include a factor of 2 to be consistent with Matlab's definition of the fft, so that:

exp(-1i*s*2*pi*f)';

(2) Concatenate the input signal with it's flipped version, to make it even, to avoid forcing it to be real, then extract the latter half of the signal.
19 Mar 2010 NCHOOSE (v2.1 mar 2010) return all combinations of the elements of a set Author: Jos (10584)

Vectorized, and just what I need. Very fast.
31 Jan 2009 PDD Melt Calculates melt for a DEM based on positive degree days factor Author: Felix Hebeler

Seems to work well. Would like to use shorter time periods.
Comments and Ratings on Joshua's Files View all
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25 Jun 2013 xcorAlign.m Shifts data by maximum cross correlation Author: Joshua Carmichael Crane, David

Light, fast, does just what it says. Thanks!
27 Mar 2012 Conic Matching Pursuit Expands data as sum of conic projections Author: Joshua Carmichael chen, zhansheng

thx for your sharing
27 Mar 2012 Windowed Conic Matching Pursuit Projects long-time series onto lower-dim cones Author: Joshua Carmichael chen, zhansheng

Thx for you sharing

24 Aug 2011 normColumns.m normalizes matrix columns Author: Joshua Carmichael yu, wang

24 Aug 2011 normColumns.m normalizes matrix columns Author: Joshua Carmichael yu, wang

it can help me to set up mptk
Top Tags Applied by Joshua
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signal processing, plotting, time series, dsp, matching pursuit
Files Tagged by Joshua View all
  • 1 - 5 of
  • 19
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
25 Jun 2010 day of year Date vectors converted to day of the year. Author: Joshua Carmichael julian day, calender, measurement, earth sciences, time, geophysics 30 4
  • 5.0
5.0 | 1 rating
13 May 2010 Screenshot D8 Algorithm for Hydrological Models Finds most likely locations for water channels given a potential Author: Joshua Carmichael d8, hydrology, glacial, earth sciences, general, d8 algorithm 6 0
03 May 2010 plotXmatrix.m Plots data on separate y-axes Author: Joshua Carmichael matrix, signal processing, time series, plot 3 0
03 May 2010 xcorAlign.m Shifts data by maximum cross correlation Author: Joshua Carmichael cross correlation, time series, matrix, circularly shifting, signal processing 6 1
  • 5.0
5.0 | 1 rating
03 May 2010 normColumns.m normalizes matrix columns Author: Joshua Carmichael normalization, time series, signal processing, matrix, norm, matching pursuit 4 1
  • 4.0
4.0 | 1 rating

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