rank

What does rank mean in relation to type conversion?

由 亡梦爱人 提交于 2019-12-10 12:56:34
问题 From C++11 standard (draft n3337) §5/9: — If both operands have the same type, no further conversion is needed. — Otherwise, if both operands have signed integer types or both have unsigned integer types, the operand with the type of lesser integer conversion rank shall be converted to the type of the operand with greater rank . — Otherwise, if the operand that has unsigned integer type has rank greater than or equal to the rank of the type of the other operand, the operand with signed

Efficiently calculate top-k elements in spark

由 戏子无情 提交于 2019-12-10 10:14:15
问题 I have a dataframe similarly to: +---+-----+-----+ |key|thing|value| +---+-----+-----+ | u1| foo| 1| | u1| foo| 2| | u1| bar| 10| | u2| foo| 10| | u2| foo| 2| | u2| bar| 10| +---+-----+-----+ And want to get a result of: +---+-----+---------+----+ |key|thing|sum_value|rank| +---+-----+---------+----+ | u1| bar| 10| 1| | u1| foo| 3| 2| | u2| foo| 12| 1| | u2| bar| 10| 2| +---+-----+---------+----+ Currently, there is code similarly to: val df = Seq(("u1", "foo", 1), ("u1", "foo", 2), ("u1",

R: Increment Rank when the column group changes

由 生来就可爱ヽ(ⅴ＜●) 提交于 2019-12-08 04:16:31
问题 Newbie to R, I've tried Googling but I'm failing find a solution. Here's my data frame: Name Value Bob 50 Mary 55 John 51 Todd 50 Linda 56 Tom 55 So I've sorted it but what I need to add a rank column, so it looks like this: Name Value Rank Bob 50 1 Todd 50 1 John 51 2 Mary 55 3 Tom 55 3 Linda 56 4 So what I found is: resultset$Rank <- ave(resultset$Name, resultset$Value, FUN = rank) But this gives me: Name Value Rank Bob 50 1 Todd 50 2 John 51 1 Mary 55 1 Tom 55 2 Linda 56 1 So close but yet

VBA/Excel RANK in C#

由 一世执手 提交于 2019-12-08 03:54:33
问题 I am working on creating calculations from a spreadsheet into C#, and I was wondering if C# has a similar method to Rank in Excel? Rank in Excel Returns the rank of a number in a list of numbers. The rank of a number is its size relative to other values in a list. (If you were to sort the list, the rank of the number would be its position.) Syntax RANK(number,ref,order) Number is the number whose rank you want to find. Ref is an array of, or a reference to, a list of numbers. Nonnumeric

Ranking Elements of multiple Lists by their count in Python

由 时光毁灭记忆、已成空白 提交于 2019-12-07 16:11:50
问题 I want to rank multiple lists according to their elements how often they appear in each list. Example: list1 = 1,2,3,4 list2 = 4,5,6,7 list3 = 4,1,8,9 result = 4,1,2,3,4,5,6,7,8 (4 is counted three times, 1 two times and the rest once) I've tried the following but i need something more intelligent and something i can do with any ammount of lists. l = [] l.append([ 1, 2, 3, 4, 5]) l.append([ 1, 9, 3, 4, 5]) l.append([ 1, 10, 8, 4, 5]) l.append([ 1, 12, 13, 7, 5]) l.append([ 1, 14, 13, 13, 6])

Oracle ListaGG, Top 3 most frequent values, given in one column, grouped by ID

由 痞子三分冷 提交于 2019-12-07 12:27:27
问题 I have a problem regarding SQL query , it can be done in "plain" SQL, but as I am sure that I need to use some group concatenation (can't use MySQL) so second option is ORACLE dialect as there will be Oracle database. Let's say we have following entities: Table: Veterinarian visits Visit_Id, Animal_id, Veterinarian_id, Sickness_code Let's say there is 100 visits (100 visit_id) and each animal_id visits around 20 times. I need to create a SELECT , grouped by Animal_id with 3 columns animal_id

VBA/Excel RANK in C#

由 喜欢而已 提交于 2019-12-07 00:09:28
I am working on creating calculations from a spreadsheet into C#, and I was wondering if C# has a similar method to Rank in Excel? Rank in Excel Returns the rank of a number in a list of numbers. The rank of a number is its size relative to other values in a list. (If you were to sort the list, the rank of the number would be its position.) Syntax RANK(number,ref,order) Number is the number whose rank you want to find. Ref is an array of, or a reference to, a list of numbers. Nonnumeric values in ref are ignored. Order is a number specifying how to rank number. If order is 0 (zero) or omitted,

Fast ranking/unranking of combinations (64bit)

由 南笙酒味 提交于 2019-12-06 15:38:51
There is this great post https://stackoverflow.com/a/3143594/6589735 outlining an algorithm of ranking/unranking combinations. Also, there are concrete implementations in C++, e.g. here https://people.sc.fsu.edu/~jburkardt/cpp_src/combo/combo.cpp I am in need of a very fast implementation in C++, that does rank/unrank combinations encoded as unsigned long long on a x64 Haswell CPU. My attempt is in great need of improvement. unsigned long long rank(unsigned long long comb, int card) { unsigned long long rank = 0; for (int i = 1; i <= card; i++) { unsigned long index; _BitScanForward64(&index,

Ranking Elements of multiple Lists by their count in Python

由 本小妞迷上赌 提交于 2019-12-06 05:01:04
I want to rank multiple lists according to their elements how often they appear in each list. Example: list1 = 1,2,3,4 list2 = 4,5,6,7 list3 = 4,1,8,9 result = 4,1,2,3,4,5,6,7,8 (4 is counted three times, 1 two times and the rest once) I've tried the following but i need something more intelligent and something i can do with any ammount of lists. l = [] l.append([ 1, 2, 3, 4, 5]) l.append([ 1, 9, 3, 4, 5]) l.append([ 1, 10, 8, 4, 5]) l.append([ 1, 12, 13, 7, 5]) l.append([ 1, 14, 13, 13, 6]) x1 = set(l[0]) & set(l[1]) & set(l[2]) & set(l[3]) x2 = set(l[0]) & set(l[1]) & set(l[2]) & set(l[4])

Oracle ListaGG, Top 3 most frequent values, given in one column, grouped by ID

由 喜你入骨 提交于 2019-12-06 03:37:43
I have a problem regarding SQL query , it can be done in "plain" SQL, but as I am sure that I need to use some group concatenation (can't use MySQL) so second option is ORACLE dialect as there will be Oracle database. Let's say we have following entities: Table: Veterinarian visits Visit_Id, Animal_id, Veterinarian_id, Sickness_code Let's say there is 100 visits (100 visit_id) and each animal_id visits around 20 times. I need to create a SELECT , grouped by Animal_id with 3 columns animal_id second shows aggregated amount of flu visits for this particular animal (let's say flu, sickness_code =
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