Rank: 221 based on 408 downloads (last 30 days) and 15 files submitted
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M. A. Hopcroft

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Files Posted by M. A. Hopcroft View all
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(last 30 days)
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18 Mar 2014 Screenshot allan Calculates standard Allan Deviation (ADEV) of a time domain signal. Author: M. A. Hopcroft statistics, probability, allan deviation, allan variance, frequency stability, stability 105 12
  • 4.5
4.5 | 6 ratings
18 Mar 2014 Screenshot allan_modified allan_modified.m calculates the modified Allan deviation (MDEV) of a time domain signal. Author: M. A. Hopcroft adev, mdev, frequency stability, allan variance, probability, statistics 16 2
  • 3.0
3.0 | 1 rating
18 Mar 2014 Screenshot allan_overlap Calculates overlapping Allan Deviation (ADEV) of a time domain signal. Author: M. A. Hopcroft adev, statistics, frequency stability, allan variance 23 2
  • 5.0
5.0 | 2 ratings
10 Dec 2013 Screenshot labJack U6 class LABJACKU6 is a class file for working with a LabJack U6 data acquisition device on Linux or OS X. Author: M. A. Hopcroft instrument control, data acquisition, instrument driver, daq 14 0
10 Oct 2013 Screenshot rd scripts A collection of scripts which load the data from contact surface profilometers Author: M. A. Hopcroft hardware driver, surface profilometer ... 17 1
  • 5.0
5.0 | 1 rating
Comments and Ratings by M. A. Hopcroft View all
Updated File Comments Rating
27 Sep 2013 allan Calculates standard Allan Deviation (ADEV) of a time domain signal. Author: M. A. Hopcroft

@Mauricio: yes, you are correct. The values returned by the function are ADEV values and you can square them to get AVAR values.

24 Sep 2013 LVM file import Imports LabView .lvm data files into MATLAB Author: M. A. Hopcroft

I have uploaded a new version with more fixes for comma-separated files and better overall performance. Thanks to @die-kenny for bug reports and testing and S. Danylenko for suggestions.

16 Jan 2013 allan Calculates standard Allan Deviation (ADEV) of a time domain signal. Author: M. A. Hopcroft

I'll have a look at it if you send me an email with some more details.

31 May 2012 LVM file import Imports LabView .lvm data files into MATLAB Author: M. A. Hopcroft

@Omar: good point. LabView creates an empty column with the label "X_Value" even if there is no X data in the file. The latest version of lvm_import ignores the label if there is no X data in the file.

19 Mar 2012 LVM file import Imports LabView .lvm data files into MATLAB Author: M. A. Hopcroft

Thank you for all the feedback. There was a bug in lvm_import related to LVM files that use a comma as a decimal separator instead of a period, so that in files that use a comma, the data was returned as strings instead of numbers, as @Pedram and @Andreas experienced. That has been fixed in the latest version of lvm_import.

Comments and Ratings on M. A. Hopcroft's Files View all
Updated File Comment by Comments Rating
10 Dec 2014 serialDataStream serialDataStream shows you how to capture continuous data streams from USB devices and serial ports. Author: M. A. Hopcroft Pablo Menendez-Aponte

This Function (and the comments) were very useful. For my application I need to store the data coming in over the serial buffer (so that I can analyze later). I am having issues with record function. In particular it seems to add 1 to the MSb of each of the values that are read on the serial. I was wondering if you have ever used the record function or if you have ever had to store the values for further analyzing and if you might have any tips. Thanks

03 Dec 2014 allan Calculates standard Allan Deviation (ADEV) of a time domain signal. Author: M. A. Hopcroft Simon

Dear Hopcroft, i get an error when using DATA.phase together with DATA.rate (put to 1). Maybe something to do with the latest update (18 Mar 2014 v2.24 fix bug related to phase data and timestamps)? Have no old version to compare with.

Error:
Index of element to remove
exceeds matrix dimensions.

Error in ==> allan at 220
data.time(1)=[]; % make time
stamps correspond to freq data

24 Nov 2014 allan Calculates standard Allan Deviation (ADEV) of a time domain signal. Author: M. A. Hopcroft MIN ZHOU

Hi,it is a convenient program to calculate the ADEV. However, the error bars seem incorrect. The error is not simply +/- 1-sigma estimation, as I know. I am not sure. Thank you!

14 Aug 2014 serialDataStream serialDataStream shows you how to capture continuous data streams from USB devices and serial ports. Author: M. A. Hopcroft shouchuan

27 Sep 2013 allan Calculates standard Allan Deviation (ADEV) of a time domain signal. Author: M. A. Hopcroft M. A. Hopcroft

@Mauricio: yes, you are correct. The values returned by the function are ADEV values and you can square them to get AVAR values.

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