Use in-place operators in m-files where possible. * scripts/audio/@audioplayer/set.m, scripts/audio/@audiorecorder/set.m, scripts/audio/mu2lin.m, scripts/elfun/cosd.m, scripts/general/del2.m, scripts/general/profexplore.m, scripts/general/quadl.m, scripts/general/rat.m, scripts/general/rotdim.m, scripts/help/get_first_help_sentence.m, scripts/help/private/__strip_html_tags__.m, scripts/image/cubehelix.m, scripts/io/textread.m, scripts/linear-algebra/duplication_matrix.m, scripts/linear-algebra/housh.m, scripts/linear-algebra/krylov.m, scripts/linear-algebra/logm.m, scripts/linear-algebra/normest.m, scripts/linear-algebra/onenormest.m, scripts/optimization/fminsearch.m, scripts/optimization/lsqnonneg.m, scripts/optimization/qp.m, scripts/plot/appearance/annotation.m, scripts/plot/appearance/axis.m, scripts/plot/appearance/legend.m, scripts/plot/appearance/specular.m, scripts/plot/draw/colorbar.m, scripts/plot/draw/hist.m, scripts/plot/draw/plotmatrix.m, scripts/plot/draw/private/__stem__.m, scripts/plot/util/__actual_axis_position__.m, scripts/plot/util/__gnuplot_drawnow__.m, scripts/plot/util/findobj.m, scripts/plot/util/print.m, scripts/plot/util/private/__go_draw_axes__.m, scripts/plot/util/private/__print_parse_opts__.m, scripts/plot/util/rotate.m, scripts/polynomial/pchip.m, scripts/polynomial/polyaffine.m, scripts/polynomial/polyder.m, scripts/polynomial/private/__splinefit__.m, scripts/polynomial/residue.m, scripts/signal/arch_fit.m, scripts/signal/arch_rnd.m, scripts/signal/bartlett.m, scripts/signal/blackman.m, scripts/signal/freqz.m, scripts/signal/hamming.m, scripts/signal/hanning.m, scripts/signal/spectral_adf.m, scripts/signal/spectral_xdf.m, scripts/signal/stft.m, scripts/sparse/bicgstab.m, scripts/sparse/cgs.m, scripts/sparse/private/__sprand_impl__.m, scripts/sparse/qmr.m, scripts/sparse/sprandsym.m, scripts/sparse/svds.m, scripts/specfun/legendre.m, scripts/special-matrix/gallery.m, scripts/statistics/base/gls.m, scripts/statistics/models/logistic_regression.m, scripts/statistics/tests/kruskal_wallis_test.m, scripts/statistics/tests/manova.m, scripts/statistics/tests/wilcoxon_test.m, scripts/time/datevec.m: Use in-place operators in m-files where possible.

--- a/scripts/signal/arch_fit.m	Mon May 25 22:02:15 2015 -0700
+++ b/scripts/signal/arch_fit.m	Tue May 26 21:07:42 2015 -0700
@@ -96,17 +96,17 @@
     tmp = esq ./ h.^2 - 1 ./ h;
     s   = 1 ./ h(1:T-p);
     for j = 1 : p;
-      s = s - a(j+1) * tmp(j+1:T-p+j);
+      s -= a(j+1) * tmp(j+1:T-p+j);
     endfor
     r = 1 ./ h(1:T-p);
     for j = 1:p;
-      r = r + 2 * h(j+1:T-p+j).^2 .* esq(1:T-p);
+      r += 2 * h(j+1:T-p+j).^2 .* esq(1:T-p);
     endfor
     r = sqrt (r);
     X_tilde = x(1:T-p, :) .* (r * ones (1,k));
     e_tilde = e(1:T-p) .*s ./ r;
     delta_b = inv (X_tilde' * X_tilde) * X_tilde' * e_tilde;
-    b   = b + gamma * delta_b;
+    b  += gamma * delta_b;
     e   = y - x * b;
     esq = e .^ 2;
     Z   = autoreg_matrix (esq, p);
@@ -114,7 +114,7 @@
     f   = esq ./ h - ones (T,1);
     Z_tilde = Z ./ (h * ones (1, p+1));
     delta_a = inv (Z_tilde' * Z_tilde) * Z_tilde' * f;
-    a = a + gamma * delta_a;
+    a += gamma * delta_a;
   endfor
 
 endfunction