From fb9e0fe33681280112e4e33939c5844dba994dca Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Wed, 04 Mar 2015 22:56:38 +0000
Subject: [PATCH] Big changes to detection
---
src/utils.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/src/utils.c b/src/utils.c
index a4071e2..1db8101 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -2,15 +2,28 @@
#include <stdlib.h>
#include <string.h>
#include <math.h>
+#include <unistd.h>
#include <float.h>
#include <limits.h>
#include "utils.h"
+
+int alphanum_to_int(char c)
+{
+ return (c < 58) ? c - 48 : c-87;
+}
+char int_to_alphanum(int i)
+{
+ if (i == 36) return '.';
+ return (i < 10) ? i + 48 : i + 87;
+}
+
void pm(int M, int N, float *A)
{
int i,j;
for(i =0 ; i < M; ++i){
+ printf("%d ", i+1);
for(j = 0; j < N; ++j){
printf("%10.6f, ", A[i*N+j]);
}
@@ -147,6 +160,27 @@
return line;
}
+void read_all(int fd, char *buffer, size_t bytes)
+{
+ size_t n = 0;
+ while(n < bytes){
+ int next = read(fd, buffer + n, bytes-n);
+ if(next <= 0) error("read failed");
+ n += next;
+ }
+}
+
+void write_all(int fd, char *buffer, size_t bytes)
+{
+ size_t n = 0;
+ while(n < bytes){
+ size_t next = write(fd, buffer + n, bytes-n);
+ if(next <= 0) error("write failed");
+ n += next;
+ }
+}
+
+
char *copy_string(char *s)
{
char *copy = malloc(strlen(s)+1);
@@ -233,6 +267,14 @@
return a;
}
+float mse_array(float *a, int n)
+{
+ int i;
+ float sum = 0;
+ for(i = 0; i < n; ++i) sum += a[i]*a[i];
+ return sqrt(sum/n);
+}
+
void normalize_array(float *a, int n)
{
int i;
@@ -253,6 +295,16 @@
}
}
+float mag_array(float *a, int n)
+{
+ int i;
+ float sum = 0;
+ for(i = 0; i < n; ++i){
+ sum += a[i]*a[i];
+ }
+ return sqrt(sum);
+}
+
void scale_array(float *a, int n, float s)
{
int i;
--
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