mirror of https://github.com/gnss-sdr/gnss-sdr
46 lines
1.2 KiB
Matlab
46 lines
1.2 KiB
Matlab
function [x,msg] = roundn(x,n)
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%ROUNDN Rounds input data at specified power of 10
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%
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% y = ROUNDN(x) rounds the input data x to the nearest hundredth.
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%
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% y = ROUNDN(x,n) rounds the input data x at the specified power
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% of tens position. For example, n = -2 rounds the input data to
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% the 10E-2 (hundredths) position.
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%
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% [y,msg] = ROUNDN(...) returns the text of any error condition
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% encountered in the output variable msg.
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%
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% See also ROUND
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% Copyright 1996-2002 Systems Planning and Analysis, Inc. and The MathWorks, Inc.
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% Written by: E. Byrns, E. Brown
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% $Revision: 1.9 $ $Date: 2002/03/20 21:26:19 $
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msg = []; % Initialize output
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if nargin == 0
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error('Incorrect number of arguments')
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elseif nargin == 1
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n = -2;
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end
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% Test for scalar n
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if max(size(n)) ~= 1
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msg = 'Scalar accuracy required';
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if nargout < 2; error(msg); end
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return
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elseif ~isreal(n)
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warning('Imaginary part of complex N argument ignored')
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n = real(n);
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end
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% Compute the exponential factors for rounding at specified
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% power of 10. Ensure that n is an integer.
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factors = 10 ^ (fix(-n));
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% Set the significant digits for the input data
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x = round(x * factors) / factors; |