udacity deep learning notes 6-model evaluation
This post is about some basic conceptions of model evaluation.
For predicting two-categry data, there are 4 possible results: True Positives, False Negatives, False Positives and True Negatives. To explain these conpects clearly, we can reference the picture below.
The blue dot represents the positive result while the red dot represents the negative result. Thus, the blue dots above the black line represent true positives, the blue dots below the line represents the false negatives, the red dot ...
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common evaluation ways for binary classification model
Confusion Matrix and Table of ConfusionConfusion matrix is a specific table layout that allows visualization of the performance of an algorithm, typically a supervised learning one. Here is a basic example:
Here is a prediction result from a classification model.
prediction
1
2
3
1
1
1
3
true
1
2
2
2
3
2
1
Use confusion matrix to interpret it and we get:
1
2
3
True
1
1
2
1
2
0
1
0
3
1
0
0
Prediction
To interpret this matrix, take look at the forth row. This mean there’ ...
「软件基础 - PLF」 19. Partial Evaluation
TBD
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angluarjs 初探
本篇文章主要是针对AngluarJS的基础知识，做一个大致的了解，对AngluarJS这一框架做简要介绍。
文章整理中，希望可以更加深入一点，敬请期待
基于lua的wireshark协议解析插件编写
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evaluate data for machine learning
“The data determines the upper bound of the machine learning model. The machine learning models approximate that upper bound.” I heard these words from my mentor during my first week internship in 个推. She was talking about how important it is to do data cleaning and feature engineering before building up sophisticated machine learning model.
In this article, I will talk about common strategies to examine your dataset during machine learning model construction.
Dataset OverviewFirst, check the ...
lua的一种continue实现
Lua中没有continue，通过另一种方式实现了continue的功能for var=exp1,exp2 do while true do if condition expressions do break end other statements ... ... break endend
Lua学习随笔
昨天刚立了FLAG，今天就来还愿了。因为是工作中接触到的，已经用了几次，比较熟悉。昨晚在晚上大概搜了下，看了两个教程，看进去了，今早又看了将近两小时，看到了些基础的东西。
我是在Windows上练习LUA，所以只用下个软件就可以开始了，非常方便。下载入口
下载后安装即可，使用方法就是首先打开SciTE，然后在里面直接敲代码，保存为以lua结尾的文件，按F5就可以看到运行结果了。
首先是注释，单行注释是
--单行注释
多行注释：
--[[
多行注释
多行注释
--]]
lua中变量不需要声明类型，默认所有变量都是全局变量，如果需要局部变量，需要使用local显式声明。
a = 5 -- 全局变量
local b = 5 -- 局部变量
lua中两个点“..”表示对字符串进行连接
print("字符串1" .. “字符串2”) --字符串1字符串2
Lua可以对多个变量同时赋值，变量列表和值列表的各个元素用逗号分开，赋值语句右边的值会依次赋给左边的变量。
a, b = 10, 2*x -- a=10; b=2*x
...
