scripts/matlab/*: add function to omit binary overflow false-positives

This function is useful to omit false positives when detecting non consecutives samples, such as the wraparound from 32767 to -32768, which are consecutive samples to the binary point of view.

scripts/matlab/*: add function to omit binary overflow false-positives
This function is useful to omit false positives when detecting non consecutives samples, such as the wraparound from 32767 to -32768, which are consecutive samples to the binary point of view.
2b74f8e5 · Lucas Russo · 5981696a · 2b74f8e5
Commit 2b74f8e5 authored Jan 29, 2016 by Lucas Russo
Hide whitespace changes
Inline Side-by-side

Showing with 20 additions and 0 deletions

omit_wraparound.m scripts/matlab/omit_wraparound.m +20 -0

No files found.
--- a/scripts/matlab/omit_wraparound.m
+++ b/scripts/matlab/omit_wraparound.m
+function x = omit_wraparound(a, nc_idx, mode, num_bits)
+
+if strcmp (mode, "twoscomplement")
+    limit_bot = -2^(num_bits-1);
+    limit_up  =  2^(num_bits-1)-1;
+elseif strcmp (mode, "offsetbinary")
+    limit_bot = 0;
+    limit_up  = 2^(num_bits)-1;
+else
+    error ("mode is not valid! Supported modes are \"twoscomplement\" and \"offsetbinary\"");
+end
+
+x = [];
+for n = 1:2:size(nc_idx,1)*size(nc_idx,2)
+    if a(nc_idx(n)) != limit_up || a(nc_idx(n+1)) != limit_bot
+        x = [x, [nc_idx(n);nc_idx(n+1)]];
+    end
+end
+
+end