Recently we were building a Shiny App in which we had to load data from a very large dataframe. It was directly impacting the app initialization time, so we had to look into different ways of reading data from files to R (in our case customer provide…

参考:https://pytorch.org/tutorials/beginner/data_loading_tutorial.html DATA LOADING AND PROCESSING TUTORIAL 在解决任何机器学习问题时,都需要花费大量的精力来准备数据.PyTorch提供了许多工具来简化数据加载,希望能使代码更具可读性.在本教程中,我们将看到如何加载和预处理/增强非平凡数据集中的数据. 为了运行下面的教程,请确保你已经下载了下面的数据包: scikit-image:为了图片的输入…

Redisql: the lightning fast data polyglot[翻译] - Linvo's blog - 博客频道 - CSDN.NET Redisql: the lightning fast data polyglot[翻译]…

eclipse中写入sql插入语句时,navicat中显示的出现乱码(???). 在修改eclipse工作空间编码.navicate中的数据库编码.mysql中my.ini中的配置之后还是出现乱码. 然后把mysql.navicate全部卸载,下载新版本. 再重新配置mysql中,因为新建data里面有文件出现“initialize specified but the data directory has files in in.Aborting.” 接着删除data里面的文件,修改my.ini…

springboot 表单体积过大时报错: The multi-part request contained parameter data (excluding uploaded files) that exceeded the limit for maxPostSize set on the associated connector. 修改springboot接受参数的大小 #设定Httppost数据大小 server.tomcat.max-http-post-size=102400000 #…

Failed to parse multipart servlet request; nested exception is java.lang.IllegalStateException: The multi-part request contained parameter data (excluding uploaded files) that exceeded the limit for maxPostSize set on the associated connector 最近项目中用到…

1.[ERROR] --initialize specified but the data directory has files in it. Abort [错误] -初始化指定,但数据目录中有文件.中止 解决方法:将数据目录下已存在的文件全部删除.如:rm -rf /data/mysql/* 重新初始化: /usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql…

目录 select The filter and arrange verbs arrange filter Filtering and arranging Mutate The count verb Summarizing top_n Selecting rename transmute Grouped mutates Window functions Data Manipulation with dplyr in R select select(data,变量名) The filter and…

启动MySQL5.7时报错:initialize specified but the data directory has files in it. Aborting 解决方法: vim /etc/my.cnf 查看文件,寻找datadir=... 查看到:datadir=/usr/local/mysql/data, 这个是data保存目录. 进入/usr/local/mysql/data后,查看到确实有数据: 将/usr/local/mysql/data备份, cd /usr/local/my…

AN2548 -- 使用 STM32F101xx 和 STM32F103xx 的 DMA 控制器 DMA控制器 DMA是AMBA的先进高性能总线(AHB)上的设备,它有2个AHB端口: 一个是从端口,用于配置DMA,另一个是主端口,使得DMA可以在不同的从设备之间传输数据. DMA的作用是在没有Cortex-M3核心的干预下,在后台完成数据传输. 在传输数据的过程中,主处理器可以执行其它任务,只有在整个数据块传输结束后, 需要处理这些数据时才会中断主处理器的操作. 它可以在对系统性能产生较小影响…