语法:row_number() over (partition by 字段a order by 计算项b desc ) rank --这里rank是别名partition by:类似hive的建表,分区的意思;order by :排序,默认是升序,加desc降序;这里按字段a分区,对计算项b进行降序排序例子:over()中也可以什么都不写 就是多加一列输出行数hive> select * from ...【阅读全文】
https://jamesmccaffrey.wordpress.com/2013/11/05/why-you-should-use-cross-entropy-error-instead-of-classification-error-or-mean-squared-error-for-neural-network-classifier-training/James D. McCaffrey Software Research, Development, Testing, and Education ...【阅读全文】
The output from short read aligners like Bowtie and BWA is commonly stored in SAM/BAM format. When presented with one of these files a common first task is to calculate the total number of alignments (reads) captured in the file. In this post I show some examples for finding the total number of re...【阅读全文】