Mercurial > hg > octave-terminal
changeset 12904:7cdf39348879
unwrap.m: Fix incorrect behavior when unwrapping gaps larger then 2*pi with tests for it (Bug #33883)
author | Andriy Shinkarchuck <adriano32.gnu@gmail.com> |
---|---|
date | Mon, 01 Aug 2011 01:18:51 +0300 |
parents | 35ea8b9b2a8e |
children | f7a8d1dafda3 |
files | scripts/signal/unwrap.m |
diffstat | 1 files changed, 29 insertions(+), 5 deletions(-) [+] |
line wrap: on
line diff
--- a/scripts/signal/unwrap.m +++ b/scripts/signal/unwrap.m @@ -75,10 +75,10 @@ idx{dim} = [1,1:m-1]; d = x(idx{:}) - x; - ## Find only the peaks, and multiply them by the range so that there - ## are kronecker deltas at each wrap point multiplied by the range - ## value. - p = rng * (((d > tol) > 0) - ((d < -tol) > 0)); + ## Find only the peaks, and multiply them by the appropriate amount + ## of ranges so that there are kronecker deltas at each wrap point + ## multiplied by the appropriate amount of range values. + p = ceil(abs(d)./rng) .* rng .* (((d > tol) > 0) - ((d < -tol) > 0)); ## Now need to "integrate" this so that the deltas become steps. r = cumsum (p, dim); @@ -128,4 +128,28 @@ %! t(++i) = xassert(any(abs(r - unwrap(w,0.8)) > 100)); %! %! assert(all(t)); - +%! +%!test +%! A = [pi*(-4), pi*(-2+1/6), pi/4, pi*(2+1/3), pi*(4+1/2), pi*(8+2/3), pi*(16+1), pi*(32+3/2), pi*64]; +%! assert (unwrap(A), unwrap(A, pi)); +%! assert (unwrap(A, pi), unwrap(A, pi, 2)); +%! assert (unwrap(A', pi), unwrap(A', pi, 1)); +%! +%!test +%! A = [pi*(-4); pi*(2+1/3); pi*(16+1)]; +%! B = [pi*(-2+1/6); pi*(4+1/2); pi*(32+3/2)]; +%! C = [pi/4; pi*(8+2/3); pi*64]; +%! D = [pi*(-2+1/6); pi*(2+1/3); pi*(8+2/3)]; +%! E(:, :, 1) = [A, B, C, D]; +%! E(:, :, 2) = [A+B, B+C, C+D, D+A]; +%! F(:, :, 1) = [unwrap(A), unwrap(B), unwrap(C), unwrap(D)]; +%! F(:, :, 2) = [unwrap(A+B), unwrap(B+C), unwrap(C+D), unwrap(D+A)]; +%! assert (unwrap(E), F); +%! +%!test +%! A = [0, 2*pi, 4*pi, 8*pi, 16*pi, 65536*pi]; +%! B = [pi*(-2+1/6), pi/4, pi*(2+1/3), pi*(4+1/2), pi*(8+2/3), pi*(16+1), pi*(32+3/2), pi*64]; +%! assert (unwrap(A), zeros(1, length(A))); +%! assert (diff(unwrap(B), 1)<2*pi, true(1, length(B)-1)); +%! +%!error unwrap()