From d8adaf8ea6a31a380f6bf1fe65e88b661d3bb51e Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Fri, 21 Oct 2016 20:16:43 +0000
Subject: [PATCH] tree stuff
---
src/blas.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/src/blas.c b/src/blas.c
index 9d42562..d6ab88b 100644
--- a/src/blas.c
+++ b/src/blas.c
@@ -1,6 +1,7 @@
#include "blas.h"
#include "math.h"
#include <assert.h>
+#include <float.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -179,3 +180,21 @@
return dot;
}
+void softmax(float *input, int n, float temp, float *output)
+{
+ int i;
+ float sum = 0;
+ float largest = -FLT_MAX;
+ for(i = 0; i < n; ++i){
+ if(input[i] > largest) largest = input[i];
+ }
+ for(i = 0; i < n; ++i){
+ sum += exp(input[i]/temp-largest/temp);
+ }
+ if(sum) sum = largest/temp+log(sum);
+ else sum = largest-100;
+ for(i = 0; i < n; ++i){
+ output[i] = exp(input[i]/temp-sum);
+ }
+}
+
--
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