merge的原则是什么?
SAS数据步中，set和merge均可以对两个以上数据库进行合并，但在使用过程中应当注意：
1、set用于数据库的纵向合并，即合并后的数据库记录是多个数据库记录的总和；使用之前不需要对数据库根据一定原则进行排序。
2、merge用于数据库的横向合并，即合并后的数据库记录为最多一个数据库的记录；使用之前需要对数据库根据一定原则进行排序。
在一些药物临床试验统计分析宏的编写中，可以使用merge对不同分析数据集分析的结果进行拼接，可以常看到的FAS与PP数据集的分析结果在一个统计表中表达。
c语言中的merge函数
merge()是C++标准库的函数，主要实现函数的排序和合并，不仅仅是合并，具体要求参照标准库。#include"stdafx.h"#include#include#include#includeusingnamespacestd;boolcomp(constinti,constintj){returni>j;}intmain(void){/*自定义谓词*/std::arrayai1={1,3,4,5};std::listlsti1;for(constauto&i:ai1)lsti1.push_front(i);//从大到小std::arrayai2={2,6,7,8};std::listlsti2;for(constauto&i:ai2)lsti2.push_front(i);lsti1.merge(lsti2,comp);std::cout):";for(constauto&i:lsti1)std::cout<<i<<"";std::cout<<std::endl;/*默认谓词*/std::arrayai1d={1,3,4,5};std::listlsti1d;for(constauto&i:ai1d)lsti1d.push_back(i);//从小到大std::arrayai2d={2,6,7,8};std::listlsti2d;for(constauto&i:ai2d)lsti2d.push_back(i);lsti1d.merge(lsti2d);std::cout<<"merge(<):";for(constauto&i:lsti1d)std::cout<<i<<"";std::cout<<std::endl;return0;}扩展资料Merge算法的两种接口，把两个有序的数组合并到另一个数组中：void Merge(int *A, int f, int m, int e){int temp[e-f+1];int i,first=f,last=m+1;for(i=0;i<(e-first+1)&&f<=m&&last<=e;i++){if(A[f]<=A[last]) {temp[i]=A[f];f++;}else {temp[i]=A[last];last++;}}while(f>m&&last<=e){temp[i]=A[last];i++;last++;}while(fe){temp[i]=A[f];i++;f++;}for(i=0;first<=e;i++,first++){A[first]=temp[i];}}参考资料来源：百度百科—c语言
新概念4课文
Bertrand Russell 伯特兰·罗素
新概念四册有一篇文章是罗素的，其中有一段话非常经典，很多人都会背：An individual human existence should be like a river -- small at first, narrowly contained within its banks, and rushing passionately past boulders and over waterfalls. Gradually the river grows wider, the banks recede, the waters flow more quietly, and in the end, without any visible break, they become merged in the sea, and painlessly lose their individual being.
An individual human existence should be like a river，一个人的存在就应该像是一条河，这是非常优美的表达方式，small at first就象征着人类的童年，narrowly contained within its banks，这里的bank指的是什么呢？既然河流象征人的一生，bank也一定有它的象征意义，值得是社会和家庭，因为这时候人还没有自己生存的能力。and rushing passionately past boulders and over waterfalls. 这象征的是人类的青年时代，rushing,冲，怎么样的冲呢，他用了一个副词修饰，passionately，激情地，我们的学习方法叫做激情联想法，人生一定不能少了激情，少了激情人生就无法迈向成功，即使你可能很有能力，没有激情也很可能时常陷入一种迷茫当中。因为你的人生是不可能一帆风顺，boulders石头，指人生的困难。Waterfalls瀑布，象征着人生遇到的困难。人生难免遇到困难和挫折，应该怎么办呢？我们要充满激情的越过这些困难和挫折，越过了所有的障碍之后怎么样呢？Gradually the river grows wider, the banks recede, the waters flow more quietly。象征着人类的老年阶段，阅历丰富，人生变得广阔，没有什么可以限制他们了。in the end, without any visible break, they become merged in the sea, and painlessly lose their individual being.融入到普遍的生命当中，就是死亡，消失了个体的存在。他认为这是毫无痛苦的。这是进入一个更加广阔的生命群体里面。这对于人生的思考有着非常深的启迪。
Python_merge file
您安好.
----------------------------
# File : warmup.py
def lines_starts_with(f, s):
____"""Return a list containing the lines of the given open file that start with
____the given str. Exclude leading and trailing whitespace.
____
____Arguments:
____- `f`: the file
____- `s`: str at the beginning of the line
____"""
____result = []
____for line in f:
________if line.startswith(s):
____________result.append(line.strip())
____return result
def file_to_dictionary(f, s):
____"""Given an open file that contains a unique string followed by a given
____string delimiter and more text on each line, return a dictionary that
____contains an entry for each line in the file: the unique string as the key
____and the rest of the text as the value (excluding the delimiter, and leading
____and trailing whitespace).
____
____Arguments:
____- `f`: the file
____- `s`: the delimiter str
____"""
____result = {}
____for line in f:
________k, _, v = line.partition(s)
________result[k.strip()] = v.strip()
____return result
def merge_dictionaries(d1, d2):
____"""Return a dictionary that is the result of merging the two given
____dictionaries. In the new dictionary, the values should be lists. If a key is
____in both of the given dictionaries, the value in the new dictionary should
____contain both of the values from the given dictionaries, even if they are the
____same.
____merge_dictionaries({ 1 : 'a', 2 : 9, -8 : 'w'}, {2 : 7, 'x' : 3, 1 : 'a'})
____should return {1 : ['a', 'a'], 2 : [9, 7], -8 : ['w'], 'x' : [3]}
____Arguments:
____- `d1`, 'd2': dicts to be merged
____"""
____result = {}
____for key in d1:
________if key in d2:
____________result[key] = [d1[key], d2[key]]
________else:
____________result[key] = [d1[key]]
____for key in d2:
________if not key in result:
____________result[key] = [d2[key]]
____return result
-----------------------------------------------------
# File fasta.py
from warmup import *
def count_sequences(f):
____"""Return the number of FASTA sequences in the given open file. Each
____sequence begins with a single line that starts with >.
____
____Arguments:
____- `f`: the file
____"""
____return len(lines_starts_with(f, '>'))
def get_sequence_list(f):
____"""Return a nested list where each element is a 2-element list containing a
____FASTA header and a FASTA sequence from the given open file (both strs).
____
____Arguments:
____- `f`: the file
____"""
____result = []
____current_key = ''
____current_data = ''
____for line in f:
________if line.startswith('>'):
____________if current_data:
________________result.append([current_key, current_data])
________________current_data = ''
____________current_key = line.strip()
________else:
____________current_data+= line.strip()
____result.append([current_key, current_data])
____return result
____
def merge_files(f1, f2):
____"""Return a nested list containing every unique FASTA header and sequence
____pair from the two open input files. Each element of the list to be returned
____is a 2-element list containing a FASTA header and a FASTA sequence.
____
____Arguments:
____- `f1`, 'f2': The File
____"""
____seq = get_sequence_list(f1) + get_sequence_list(f2)
____seq = list( set(seq) )
____return seq
def get_codons(s):
____"""Return a list of strings containing the codons in the given DNA sequence.
____
____Arguments:
____- `s`: DNA sequence, divied by 3
____"""
____return [s[3*i : 3*(i+1)] for i in xrange(len(s)/3)]
def get_amino_name_dict(f):
____"""Return a dictionary constructed from the given open file, where the keys
____are amino acid codes and the values are the amino acid names.
____
____Arguments:
____- `f`: the file, like amino_names.txt
____"""
____return file_to_dictionary(f, ' ')
def get_codon_amino_dict(f):
____"""Return a dictionary where the keys are codons and the values are amino
____acid codes from the given open file.
____
____Arguments:
____- `f`: the file, like codon_aminos.txt
____"""
____return file_to_dictionary(f, ':')
def translate(s, d):
____"""Return the given DNA sequence (the str parameter) translated into its
____amino acid codes, according to the given dictionary where the keys are
____codons and the values are amino acid codes. You may assume that the length
____of the string is divisible by 3.
____
____Arguments:
____- `s`: given DNA sequence
____- `d`: given dictionary
____"""
____codons = get_codons(s)
____result = []
____for i in codes:
________result.append(d[i])
____return result
def codon_to_name(s, d1, d2):
____"""Return the name of the amino acid for the given codon (the str
____parameter).
____
____Arguments:
____- `s`: given codon
____- `d1`: codons for keys and amino acid codes for values
____- `d2`: amino acid codes for keys and name for values
____"""
____return d2[d1[s]]
英语中合成有哪些?哪些分开写
1名词的合成词加不加连字符看这个词是不是词汇里本来就有的，比如说书包，就是schoolbag，人家一开始就以合成的方式定了这个词汇，就像我们定义“白雪”这个词时就用了白色的雪这个合成方式，这种是不加连字符的，但也算是合成词，这种类型的你得以词典为准。
2 除了单纯的名词复合的，带点动词，形容词变形类的大多加连字符。这就分好多类型了。什么a three-cornered hat、a snow-white wall、 a long-distance call，等等，加了词变形的大多加连字符
3 长短语构成的，需要用连字符的，为了换行好看用的。这一类的用连字符。a life-and-death struggle;a face-to-face talk;a difficult-to-operate machine etc.
最后总结：这三种书写方法没有什么确定的规则，主要依据习惯或个人偏爱，有的复合词甚至三种写法都可以。一般来说，英国英语用连字符的场合较多，而美国英语似有不用连字符的倾向。总的说来，现代英语在拼写方面有从繁趋简的倾向，许多原来分开写的复合词，后来发展成用连字符，现在又发展为定成一个词。
amalgamate 与 combine 的区别
amalgamate一般指公司或集团的联合，合并。是动词
mixture指混合物，可以是很多不同的人，物，感觉或者主意等。是名词。
combine可做动词，指使结合，指如果你使不同的东西，主意等等结合起来后，他们就会出现一个整体，或者可以一起工作；也可作名词，表示联盟，联合体。或同样表“联合”，如combine harvester联合收割机。
希望我的解答能使你满意。
joinby和merge有什么区别
join by
因……而加入更多释义>>
[网络短语]
were join ed by marriage 因婚姻而缔结
join by credit card 加入信用卡,参加由信用卡,通过信用卡加入
join by interweaving strands 接合
merge
英 [mɜːdʒ]
美 [mɝdʒ]
vt. 合并；使合并；吞没
vi. 合并；融合
n. (Merge)人名；(意)梅尔杰
更多释义>>
[网络短语]
Merge 合并,归并,语句
Merge Visible 合并可见图层,合并所有可见层,归并可见图层
Merge Tool 合并工具,合成工具,兼并工具
