大约有 30,000 项符合查询结果（耗时：0.0120秒） [XML]
For each row return the column name of the largest value
...make examples using sample reproducible):
DF <- data.frame(V1=c(2,8,1),V2=c(7,3,5),V3=c(9,6,4))
colnames(DF)[apply(DF,1,which.max)]
[1] "V3" "V1" "V2"
A faster solution than using apply might be max.col:
colnames(DF)[max.col(DF,ties.method="first")]
#[1] "V3" "V1" "V2"
...where ties.method...
How can I determine whether a 2D Point is within a Polygon?
...ntersecting(
float v1x1, float v1y1, float v1x2, float v1y2,
float v2x1, float v2y1, float v2x2, float v2y2
) {
float d1, d2;
float a1, a2, b1, b2, c1, c2;
// Convert vector 1 to a line (line 1) of infinite length.
// We want the line in linear equation standard form: A*x + ...
What are the differences between GPL v2 and GPL v3 licenses? [closed]
...ms, what are the reasons for, and what are the differences between the GPL v2 and GPL v3 open source licenses? Explanations and references to legal terms and further descriptions would be appreciated.
...
How to combine multiple conditions to subset a data-frame using “OR”?
...
my.data.frame <- subset(data , V1 > 2 | V2 < 4)
An alternative solution that mimics the behavior of this function and would be more appropriate for inclusion within a function body:
new.data <- data[ which( data$V1 > 2 | data$V2 < 4) , ]
Some peopl...
Bootstrap: How do I identify the Bootstrap version?
...e bootstrap.css you should have comments like the below:
/*!
* Bootstrap v2.3.1
*
* Copyright 2012 Twitter, Inc
* Licensed under the Apache License v2.0
* http://www.apache.org/licenses/LICENSE-2.0
*
* Designed and built with all the love in the world @twitter by @mdo and @fat.
*/
If they...
How to put Google Maps V2 on a Fragment using ViewPager
...s and viewpager from androidhive. However, I can't implement google maps v2 on it. I searched the internet for hours already, but I can't find a tutorial on how to do it. Can some one please show me how?
...
Tokumx 副本集（集群）全攻略 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...查看同步详情。（详细参见：https://www.tsingfun.com/it/bigdata_ai/335.html）
仲裁节点（投票）：一个虚拟的从库（不可作为主库），不同步任何数据。
程序连接Mongo集群：不能单独连接从库，主库可以。
查看状态：
./mongo
rs.statu...
【未发布】AI2 UDP Extension 拓展研究 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
http://ullisroboterseite.de/android-AI2-UDP.html
最新升级了AI2Starter4.6，使用三星手机样式，提升显示分辨率 - App Invent...
最新版下载点这里：https://www.fun123.cn/reference/creative/ai2_starter.html
之前的样式及分辨率：
最新版样式及分辨率：
Appinventor的人工智能组件在哪里？ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...hatBot”及“ImageBot”组件。
都是调用ChatGPT，第一个是AI对话，第二个是AI绘图。
更多指导，请查看中文文档：https://www.fun123.cn/reference/ ... mental.html#ChatBot
另外，除了调用ChatGPT外，还有很多拓展可以自行训练AI数据集，自...