SML | SIGIR 2020 paper : How to Retrain Recommender System | Recommender System library
kandi X-RAY | SML Summary
kandi X-RAY | SML Summary
This is an implementation for our SIGIR 2020 paper: How to Retrain Recommender System? A Sequential Meta-Learning Method. Contributors: Yang Zhang, Chenxu Wang, Fuli Feng, Xiangnan He.
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- Base train function
- Runs the test
- Get the next stage
- Get next stage
- Train the model
- Get the next training
- Train the MF model
- Train one stage
- Creates train dataset
- Argument parser
- Creates training and test sets
- Compute the mpr loss
- Calculate the mean squared error
- Compute the MPR loss
- Forward convolutional layer
- Forward convolution
- Return training and test sets
- Calculate the precision for a set of targets
- Calculate the weight transfer
- Calculate the weight of a weight matrix
- Select negative sample for interaction
- Run a single stage
- Calculates the NDG of the target item in ranklist
- Evaluate a model before training
- Evaluate a model on test set
- Compute the objective function
SML Key Features
SML Examples and Code Snippets
Community Discussions
Trending Discussions on SML
QUESTION
The code below was working fine, and then it suddenly started sending corrupted PDF attachments.
...ANSWER
Answered 2021-Jun-11 at 10:14Turns out that this has done the trick:
Changing the url and exportOptions from
QUESTION
Precondition:
I used the Compiler Explorer https://godbolt.org/ to run the code snipped below.
Problem description:
I tried to access the events members when using the generic event ('_' underscore) handling for on_entry/on_exit definitions.
This is working only for the newest gcc compiler x86-64 gcc 11.1 available on the Compiler Explorer. For older versions it throws errors.
So I tried different solutions to overcome this issue.
In my code snipped below you will find 3 different versions that can be used to test this issue.
The 1. and the 2. Version will only work with the newest gcc compiler x86-64 gcc 11.1
The 3. Version allows to solve this issue with an awkward reinterpret_cast which I think is not a nice solution.
Questions:
A) Is my current solution with reinterpret_cast a safe solution or do you see some pitfalls?
If you see some pitfalls, then please explain them. Thanks!
B) Is there any other solution to overcome this issue with older gcc compilers as the x86-64 gcc 11.1 without using a reinterpret_cast? Thanks!
Code snipped:
...ANSWER
Answered 2021-Jun-10 at 23:11If you remove the following overload, then invalid memory read would happen. That is a pitfall.
QUESTION
fun map f nil = nil
| map f (hd::tl) = f(hd) :: map f tl;
fun everywhere e nil = [[e]]
| everywhere e (y::ys) =
(e::y::ys) :: (map (fn u => y::ys) (everywhere e ys));
ANSWER
Answered 2021-Jun-04 at 12:54First, I guess "everywhere" should be fixed to get the behavior expected from its name:
QUESTION
I would like to know the number of cases in which 1 dollar can be expressed in 1,5,10,20,50 cents.
For example, the count(100,[50,25]) is:
Because 50 * 1 + 25 * 2, it = 3:int is printed.
However, in my code, only the front part of the list is printed, so even if I count (100,[50,25]), it = 2:int is printed.
In other words, My code is not taking advantage of the whole list.
How do I solve this?
SML coin count function:
...ANSWER
Answered 2021-May-30 at 16:27Consider what happens as you evaluate your test expression of count (100, [50, 25]).
cnt is 0, y is 50, and ys is [25].
y times 2 does equal 100, so it returns cnt+2 which is 2. Nothing further happens.
When it comes to recursion, remember than the parameter list to a function is your means of communication. It seems like cnt is something that should be passed as a parameter so you can update it between recursive calls.
With count(x, []) = 0 you already have an exit point that will stop the recursion.
Edit: Based on comments, it looks like you're trying to figure out how many times each value in a list goes into a value x.
So the end result of your recursive function isn't a single integer. It's a list of integers. Or better yet, of tuples containing the value to look for, and the number of times it goes into x.
So if the list is empty, the result is obvious.
QUESTION
In fact, I don't know exactly what "lisp notation" means. So I tried to make it as similar to the list format as possible, but I can't express it like an example because () or (,) looks the same. How can I represent a list like the example?
my sml code:
datatype 'a Tree = null | Tree of 'a Tree list | leaf of 'a;
fun prettyprint(null) = [] | prettyprint(leaf(v)) = [v] | prettyprint(Tree(h::t)) = prettyprint(h) @ prettyprint(Tree(t)) | prettyprint(Tree([])) = []
val ex = Tree [leaf( 2 , 3 ,( 1 , 3 ), 4 ,( ( 3 ) ), 7 )];
Examples to represent:
val it = " ( 2 3 ( 1 3 ) 4 ( ( 3 ) ) 7 ) " : string
ANSWER
Answered 2021-May-29 at 10:40This may not be your exact solution. But Lisp is a family of programming languages with a long history and a distinctive, fully parenthesized prefix notation.
When representing source code in Lisp, the first element of an expression is commonly an operator or function name and any remaining elements are treated as arguments. This is called "prefix notation" or "Polish notation". As an example, the Boolean expression written 4 == (2 + 2) in C, is represented as (= 4 (+ 2 2)) in Lisp's prefix notation.
You can find many prefix (or preorder) algorithm in the net and implement it based your program language.
QUESTION
When researching table bloat there is this query that crops up in quite a few places.
From what i can see its basically been copy pasted since 2008
I'm struggling to decipher this query so as not to blindly rely on it.
What is so special about the 27 or 23 here and the difference between a windows and non-windows install to offer the values 4 or 8 ?
CASE WHEN SUBSTRING(v,12,3) IN ('8.0','8.1','8.2') THEN 27 ELSE 23 END AS hdr,
CASE WHEN v ~ 'mingw32' THEN 8 ELSE 4 END AS ma
Can anyone offer any insights into this query ?
Would using pgstattuple be a more sensible approach to calculating table bloat ?
Thanks.
...ANSWER
Answered 2021-May-11 at 15:05The fragment you wonder about uses the version of the database:
QUESTION
I was interested in if there is a possible way to get length of tuple in sml?! See example
...ANSWER
Answered 2021-May-06 at 08:24An example of what you're most likely expected to do; define some useful sum types.
First, let's invent two ways to identify a person:
QUESTION
I am trying to study SML (for full transparency this is in preparation for an exam (exam has not started)) and one area that I have been struggling with is higher level functions such as map and foldl/r. I understand that they are used in situations where you would use a for loop in oop languages (I think). What I am struggling with though is what each part in a fold or map function is doing. Here are some examples that if someone could break them down I would be very appreciative
...ANSWER
Answered 2021-May-02 at 14:29map takes a function and a list and produces a new list.
In map (fn x=> x*x*x) L, the function is fn x=> x*x*x, and L is the list.
This list is the same list as cubiclist's parameter.
foldr takes a function, an initial value, and a list and produces some kind of value.
In foldr (fn (a,b) => if (a < b) then a else b) x xs, the function is fn (a,b) => if (a < b) then a else b, the initial value is x, and the list is xs.
x and xs are given to the function by pattern-matching; x is the argument's head and xs is its tail.
(It follows from this that min will fail if it is given an empty list.)
QUESTION
Let's say I have 0.0 how do I convert it to 0?
I know that I can use Real.fromInt(0) to do the opposite (0 -> 0.0) but what about Real to Int?
In the SML documentation I read about a function toInt, but there was no example so I probably use it in the wrong way.
I tried this:
Real.toInt(a)
val a Real.toInt;
Both are wrong...
...ANSWER
Answered 2021-Apr-19 at 11:42Real.toInt has type IEEEReal.rounding_mode -> real -> int so it requires that you specify a rounding mode. For example:
QUESTION
I have these
...ANSWER
Answered 2021-Apr-11 at 04:50Put some types on your functions so that Haskell can give you better hints about where you went wrong. Without types, it will make assumptions about what you meant until it reaches a contradiction, and you won't know which assumption was wrong.
In this case, the confusion is that sometimes ftFO returns a number, and sometimes it returns an FTree. This isn't want you meant, but it's technically allowed if Haskell assumes that FTree can be understood as a number. So Haskell carries on with that idea for a while until it discovers that nobody has said how to interpret FTree as a number.
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Install SML
You can use SML like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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