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# engstr

## (Toolbox/engstr.m in BrainStorm 2.0 (Alpha))

### Function Synopsis

    str = engstr(num,prec);

### Help Text

    ENGSTR - create a string for the number in engineering format
     function str = engstr(num,prec);
     If Format is given, then the number of values
      after the decimal point is equal to the integer prec
     Otherwise, prec defaults to 1, as in 2.5 K

### Cross-Reference Information

This function is called by

    data_manager                       C:\BrainStorm_2001\Toolbox\data_manager.m

### Listing of function C:\BrainStorm_2001\Toolbox\engstr.m

    function str = engstr(num,prec);
    %ENGSTR - create a string for the number in engineering format
    % function str = engstr(num,prec);
    % If Format is given, then the number of values
    %  after the decimal point is equal to the integer prec
    % Otherwise, prec defaults to 1, as in 2.5 K

    %<autobegin> ---------------------- 26-May-2004 11:30:14 -----------------------
    % --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
    %
    % CATEGORY: Utility - General
    %
    % At Check-in: $Author: Mosher $  $Revision: 12 $  $Date: 5/26/04 9:59a $
    %
    % This software is part of BrainStorm Toolbox Version 2.0 (Alpha) 24-May-2004
    %
    % Principal Investigators and Developers:
    % ** Richard M. Leahy, PhD, Signal & Image Processing Institute,
    %    University of Southern California, Los Angeles, CA
    % ** John C. Mosher, PhD, Biophysics Group,
    %    Los Alamos National Laboratory, Los Alamos, NM
    % ** Sylvain Baillet, PhD, Cognitive Neuroscience & Brain Imaging Laboratory,
    %    CNRS, Hopital de la Salpetriere, Paris, France
    %
    % See BrainStorm website at http://neuroimage.usc.edu for further information.
    %
    % Copyright (c) 2004 BrainStorm by the University of Southern California
    % This software distributed  under the terms of the GNU General Public License
    % as published by the Free Software Foundation. Further details on the GPL
    % license can be found at http://www.gnu.org/copyleft/gpl.html .
    %
    % FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
    % UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
    % WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
    % MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
    % LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
    %<autoend> ------------------------ 26-May-2004 11:30:14 -----------------------

    if(~exist('prec','var')),
       prec = [];
    end
    if(isempty(prec)),
       Format = '%.1f'; % default
    else
       Format = sprintf('%%.%.0ff',prec); % user given
    end

    base = floor(log10(num)/3);

    mant = num/10^(3*base);

    switch base
    case -3
       suffix = 'nano';
    case -2
       suffix = 'micro';
    case -1
       suffix = 'milli';
    case 0
       suffix = '';
    case 1
       suffix = 'K';
    case 2
       suffix = 'M';
    case 3
       suffix = 'G';
    otherwise
       suffix = sprintf('x 10^(%.0f)',base*3);
    end

    str = sprintf([Format ' %s'],mant,suffix);

    return

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