upgrade gridflow

svn path=/trunk/; revision=12728

1 files changed, 164 insertions, 0 deletions

diff --git a/externals/gridflow/doc/flow_classes/#moment-help.pd b/externals/gridflow/doc/flow_classes/#moment-help.pd
new file mode 100644
index 00000000..0d47f338
--- /dev/null
+++ b/externals/gridflow/doc/flow_classes/#moment-help.pd
@@ -0,0 +1,164 @@
+#N canvas 663 46 632 642 10;
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+#X msg 234 48 4 2 # 1 1 1 -1 -1 -1 -1 1;
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+#X obj 43 258 display;
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+#X obj 67 181 #t;
+#X obj 110 207 #moment;
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+#X text 162 460 red filter;
+#X text 121 105 draw rectangles;
+#X text 238 31 rectangle polygon;
+#X obj 42 206 #moment 2;
+#X obj 269 192 #moment_polar;
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+;
+#X text 141 329 this is a fudge factor.;
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+#X text 143 341 depending on what you want to do \,;
+#X text 140 353 you set it to 2 \, 3 \, 4 \, whatever.;
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+#X text 232 589 1: average index of the values in the grid \, weighted
+by the values themselves.;
+#X text 232 624 2: average square of index of the values in the grid
+\, weighted by the values themselves. this can be used to compute a
+variance (covariance) matrix \, which in turn can be fed to [#moment_polar]
+to figure out the standard deviation and the direction of the standard
+deviation.;
+#X text 232 848 mode 1: a grid[2];
+#X text 232 870 mode 2: a grid[2 \, 2];
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+#X text 232 760 mode 2: alleged centroid (doesn't have to be the real
+centroid \, but when it is \, the output will be the variance matrix
+\; else it won't be a centred moment);
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