I'm trying an Apache Mahout example using the code bellow. Everything works fine except that each time I change the userId value I need to run the class twice so that new values are returned. What I mean by that, is that every time I run it, the previous run output is showed, even with a different userId and that user recommendations.
I've tried not using the cache recommender but that hasn't worked either.
I'm using Eclipse IDE and the code of the class is the following:
DataModel model = new FileDataModel(new File("database.csv"));
UserSimilarity userSimilarity = new LogLikelihoodSimilarity(model);
System.out.println("Method: " + userSimilarity.getClass().getName().substring(userSimilarity.getClass().getName().lastIndexOf(".") + 1));
int neighborhood= 25;
System.out.println("Neighborhood: " + neighborhood);
UserNeighborhood neighborhood = new NearestNUserNeighborhood(neighborhood, userSimilarity, model);
Recommender recommender = new GenericUserBasedRecommender(model, neighborhood, userSimilarity);
Recommender cachingRecommender = new CachingRecommender(recommender);
int userId = 1234;
System.out.println("User ID: " + userId);
List<RecommendedItem> recommendations = cachingRecommender.recommend(userId, 15);
System.out.println("Recomendations:");
for (RecommendedItem r : recommendations) {
System.out.println(r.getItemID() + " " + r.getValue());
}
Related
I'm trying to use vmware sdk for java to collect the perfomance data of each entity (cluster/datastore/Host/VM) in the vmware environment.
The idea is to get the available PerfMetricIds for the target entity with queryAvailablePerfMetric, query those and report the details of the counter, the timestamp and the value.
However when I get the PerfMetricIds for an entity, not every detected (returned) PerfMetricId is reporting data. For example for each Datastore I get at least 4 ids which do not return data when queried, these IDs represent the counters associated with the average number of read and write operations, and for a cluster I'm missing the cpu usage, and so on ...
so I was wondering when does this happen? Shouldn't every metric returned by queryAvailablePerfMetric report data? what am I missing here?
Minimal code snippet:
// VMWare credentials
String vmwareUrl = args[0];
String vmwareUsername = args[1];
String vmwarePassword = args[2];
// connect to vCenter
ServiceInstance si = new ServiceInstance(new URL(vmwareUrl), vmwareUsername, vmwarePassword, true);
// get performance manager
PerformanceManager perfMgr = si.getPerformanceManager();
// define the time window (the last one hour)
Calendar calTo = Calendar.getInstance();
Calendar calFrom = Calendar.getInstance();
calFrom.setTime(calTo.getTime());
calFrom.add(Calendar.HOUR, -1);
// get any datastore for testing purposes
Folder rootFolder = si.getRootFolder();
ManagedEntity[] datastores = new InventoryNavigator(rootFolder).searchManagedEntities("Datastore");
ManagedEntity me = datastores[1];
// query all available metrics for the entity
PerfMetricId[] availablePmis = perfMgr.queryAvailablePerfMetric(me, calFrom, calTo, perfMgr.getHistoricalInterval()[0].getSamplingPeriod());
// create PerfQuerySpec
PerfQuerySpec qSpec = new PerfQuerySpec();
qSpec.setEntity(me.getMOR());
qSpec.setMetricId(availablePmis);
qSpec.setFormat("csv");
qSpec.setStartTime(calFrom);
qSpec.setEndTime(calTo);
// query perf
PerfEntityMetricBase[] perfValues = perfMgr.queryPerf(new PerfQuerySpec[]{qSpec});
// Printing
System.out.println("Found pmis (CounterIDs only): ");
for (PerfMetricId pmi : availablePmis){
System.out.print(pmi.getCounterId() + ", ");
}
System.out.print("\nPmis with values:");
int pmisCount=0;
for (PerfEntityMetricBase value : perfValues) {
PerfMetricSeriesCSV[] csvValues = ((PerfEntityMetricCSV) value).getValue();
pmisCount += csvValues.length;;
for (PerfMetricSeriesCSV csv : csvValues) {
System.out.println("Counter ID: " + csv.getId().getCounterId() + " ---- Metric instance: " + csv.getId().getInstance());
System.out.println("\tInfo: " + ((PerfEntityMetricCSV) value).getSampleInfoCSV());
System.out.println("\tValues: " + csv.getValue());
}
}
System.out.println("---------------");
System.out.println("Detected PMIs: " + availablePmis.length);
System.out.println("PMIs with values: " + pmisCount);
Any help (or discussions) would be appreciated
Is it possible to get RMSPE after cross validating a model? I see I can easily get RMSE - but what about the Root Mean Square Percentage Error?
Sample code I've put together with WEKA linear regression cross validation:
// loads data and set class index
final ArrayList<Attribute> attributes = new ArrayList<>();
attributes.add(new Attribute("x"));
attributes.add(new Attribute("y"));
Instances data = new Instances("name", attributes, 0);
data.add(new DenseInstance(1d, new double[]{5, 80}));
// ... add more data
// -c last
data.setClassIndex(data.numAttributes() - 1);
// classifier
final LinearRegression cls = new LinearRegression();
// other options
int seed = 129;
int folds = 3;
// randomize data
Random rand = new Random(seed);
Instances randData = new Instances(data);
randData.randomize(rand);
if (randData.classAttribute().isNominal())
randData.stratify(folds);
// perform cross-validation
Evaluation eval = new Evaluation(data);
eval.crossValidateModel(cls, data, 3, new Random(seed));
System.out.println("rootMeanSquaredError " + eval.rootMeanSquaredError());
System.out.println("rootRelativeSquaredError " + eval.rootRelativeSquaredError());
System.out.println("rootMeanPriorSquaredError " + eval.rootMeanPriorSquaredError());
// output evaluation
System.out.println();
System.out.println("=== Setup ===");
System.out.println("Classifier: " + cls.getClass().getName() + " " + Utils.joinOptions(cls.getOptions()));
System.out.println("Dataset: " + data.relationName());
System.out.println("Folds: " + folds);
System.out.println("Seed: " + seed);
System.out.println();
System.out.println(eval.toSummaryString("=== " + folds + "-fold Cross-validation ===", true));
/*
=== Setup ===
Classifier: weka.classifiers.functions.LinearRegression -S 0 -R 1.0E-8 -num-decimal-places 4
Dataset: name
Folds: 3
Seed: 129
=== 3-fold Cross-validation ===
Correlation coefficient 0.6289
Mean absolute error 7.5177
Root mean squared error 8.262
Relative absolute error 85.7748 %
Root relative squared error 77.9819 %
Total Number of Instances 15
*/
Weka doesn't compute the RMSPE by default. I've put together a little Weka package that should do the trick for numeric classes (NB: only done limited testing), called rmspe-weka-package.
After an evaluation run (with that package installed), you should be able to retrieve the statistic as follows:
Evaluation eval = ... // initialize your evaluation object
... // perform your evaluation
double rmspe = eval.getPluginMetric("weka.classifiers.evaluation.RMSPE").getStatistic("RMSPE");
I have the below code and when I run it through Prolog it creates a new file with a new rule. For example, I run
create_rec(check_symptoms(Symptoms,noOk))
it creates a new file with name rule_new and content all predicates with the old rules
and the new rule predicate with content is
rule(r15,_G3583,_G3601):-check_symptoms(_G3593,noOk)
The problem is that when I call the predicate create_rec from Java it does not work:
rules([r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,r13,r14]).
% other predicates
create_rec(Body) :-
clause(rules(R_ids), B1),
last(R_ids,LastRule_id),
atom_codes(LastRule_id, Rule_codes),
Rule_codes = [H|T],
atom_codes(AtomNum,T),
atom_number(AtomNum,Num),
NewNum is Num+1,
atom_codes(NewNum,NewNumCodes),
atom_codes(NewRule_id,[114|NewNumCodes]),
append(R_ids, [NewRule_id], New_R_ids),
retract(rules(R_ids)),
asserta((rules(New_R_ids))),
asserta((rule(NewRule_id,A,B) :- Body)),save_rule.
save_rule :-
tell('rule_new.pl'),
write(':- dynamic rule/3, rules/1.'),nl,
write(':- [\'kb_anemia_V5b.pl\'].'),nl,
write(':- encoding(utf8).'),nl,
write(':- style_check(-singleton).'),
clause(rules(R_ids),B),nl,
write((rules(R_ids) :- B)),
write('.'),
get_rule_data(R_ids),
told.
get_rule_data([]).
get_rule_data([Rule_id|Rest_Rule_Id]) :-
clause(rule(Rule_id,A,B),Body1),
% fix(B,[],B2),
write(rule(Rule_id,A,B2):-Body1),write('.'), nl,
get_rule_data(Rest_Rule_Id).
% other predicates
The code in Java is:
Term consult_arg[] = {
new Atom(Diagnosis.class.getResource("anemia_diagnosis").getPath())};
Query consult_query = new Query( // to kanei query gia na ginei
"consult", //to consult
consult_arg);
boolean consulted = consult_query.hasSolution();
if (!consulted) {
System.err.println("Consult failed");
System.exit(1);
}
bodycr = body_txt1.getText();
String t9 = "create_rec(" + bodycr + " )." + "\n";
System.out.println("FUNCTION IS " + t9);
Query q9 = new Query(t9);
diagnosis = q9.oneSolution().toString();
System.out.println(diagnosis);
JOptionPane.showMessageDialog(null, "KB is created ");
It takes the body from the textarea and call the predicate. The pop up message is displayed , no bugs were found but the file is not created.
I don't know what is wrong. Can anyone help me?
I am really new to SOAP web services and to Netsuite ERP and I am trying to generate a report in my company where I need to obtain all the Clients and their Invoices using the data available in Netsuite ERP. I followed the Java and Axis tutorial they offer with their sample app for the ERP and I successfully created a Java project in Eclipse that consumes the WSDL for netsuite 2015-2 and compiles the needed classes to run the sample app. So, I followed an example found in their CRM exapmle app to obtain a Client's information but the only problem is that their example method needs you to introduce the Client's ID. Here is the sample code:
public int getCustomerList() throws RemoteException,
ExceededUsageLimitFault, UnexpectedErrorFault, InvalidSessionFault,
ExceededRecordCountFault, UnsupportedEncodingException {
// This operation requires a valid session
this.login(true);
// Prompt for list of internalIds and put in an array
_console
.write("\ninternalIds for records to retrieved (separated by commas): ");
String reqKeys = _console.readLn();
String[] internalIds = reqKeys.split(",");
return getCustomerList(internalIds, false);
}
private int getCustomerList(String[] internalIds, boolean isExternal)
throws RemoteException, ExceededUsageLimitFault,
UnexpectedErrorFault, InvalidSessionFault, ExceededRecordCountFault {
// Build an array of RecordRef objects and invoke the getList()
// operation to retrieve these records
RecordRef[] recordRefs = new RecordRef[internalIds.length];
for (int i = 0; i < internalIds.length; i++) {
RecordRef recordRef = new RecordRef();
recordRef.setInternalId(internalIds[i]);
recordRefs[i] = recordRef;
recordRefs[i].setType(RecordType.customer);
}
// Invoke getList() operation
ReadResponseList getResponseList = _port.getList(recordRefs);
// Process response from get() operation
if (!isExternal)
_console.info("\nRecords returned from getList() operation: \n");
int numRecords = 0;
ReadResponse[] getResponses = getResponseList.getReadResponse();
for (int i = 0; i < getResponses.length; i++) {
_console.info("\n Record[" + i + "]: ");
if (!getResponses[i].getStatus().isIsSuccess()) {
_console.errorForRecord(getStatusDetails(getResponses[i]
.getStatus()));
} else {
numRecords++;
Customer customer = (Customer) getResponses[i].getRecord();
_console.info(" internalId="
+ customer.getInternalId()
+ "\n entityId="
+ customer.getEntityId()
+ (customer.getCompanyName() == null ? ""
: ("\n companyName=" + customer
.getCompanyName()))
+ (customer.getEntityStatus() == null ? ""
: ("\n status=" + customer.getEntityStatus().getName()))
+ (customer.getEmail() == null ? ""
: ("\n email=" + customer.getEmail()))
+ (customer.getPhone() == null ? ""
: ("\n phone=" + customer.getPhone()))
+ "\n isInactive="
+ customer.getIsInactive()
+ (customer.getDateCreated() != null ? ""
: ("\n dateCreated=" + customer
.getDateCreated().toString())));
}
}
return numRecords;
}
So as you can see, this method needs the internal ID of each Customer which I find not useful as I have a many Customers and I don't want to pass each Customer's ID. I read their API docs (which I find hard to navigate and kind of useless) and I found a web service called getAll() that gives all the records given a getAllRecord object which requires a getAllRecordType object. However, the getAllRecordType object does not support Customer entities, so I can't obtain all the customers on the ERP this way.
Is there an easy way to obtain all the Customers in my Netsuite ERP (maybe using other thing rather than the SOAP Web Services they offer? I am desperate about this situation as understanding how Netsuite's Web Services API has been really troublesome.
Thanks!
You would normally use a search to select a list of customers. On a large account you would not normally get all customers on any regular basis. If you are trying to get the invoices you might just find it more practical to get those with a search.
You wrote "in your company". Are you trying to write an application of some sort? If this is an internal project (and even if it's not) you'll probably find using SuiteScripts much more efficient in terms of your time and frustration level.
I made it using the following code on my getCustomerList method:
CustomerSearch customerSrch = new CustomerSearch();
SearchResult searchResult = _port.search(customerSrch);
System.out.println(searchResult.getTotalRecords());
RecordList rl = searchResult.getRecordList();
for (int i = 0; i <searchResult.getTotalRecords()-1; i++) {
Record r = rl.getRecord(i);
System.out.println("Customer # " + i);
Customer testcust = (Customer)r;
System.out.println("First Name: " + testcust.getFirstName());
}
I have wirtten a program to manage tv series and I am stuck at an issue with lightcouch and a specific database query. This is what I have so far. To setup the database views I used the following lines:
MapReduce get_numberOfSeasonsMR = new MapReduce();
get_numberOfSeasonsMR.setMap(
"function(doc) { "
+ " emit(doc.seriesName, doc.season)"
+ "}");
get_numberOfSeasonsMR.setReduce(
"function (key, values, rereduce) {"
+ "return Math.max.apply({}, values)"
+ "}");
map.put("get_numberOfSeasons", get_numberOfSeasonsMR);
In Futon everything appears normal (see http://i.stack.imgur.com/1hgSJ.png).
However, when I try to execute the following line, I get an exception, instead of the results that appear in Futon.
int nr = client.view("design/get_numberOfSeasons").key("Arrow").queryForInt();
Exception:
org.lightcouch.NoDocumentException: Expecting exactly a single result of this view query, but was: 0
org.lightcouch.View.queryValue(View.java:246)
org.lightcouch.View.queryForInt(View.java:219)
....db.Server.getNumberOfSeasons(Server.java:237)
...
I tried to emit Strings in my map() function instead on ints, but it did not make any difference. What am I doing wrong? Or can someone post an example of a successful lightcouch map()+reduce() operation? The tutorials I found only used map() without reduce().
Thanks in advance ;)
Nothing seems wrong with your code, here is the full version:
CouchDbClient dbClient = new CouchDbClient();
DesignDocument designDocument = new DesignDocument();
designDocument.setId("_design/mydesign");
designDocument.setLanguage("javascript");
MapReduce get_numberOfSeasonsMR = new MapReduce();
get_numberOfSeasonsMR.setMap(
"function(doc) { "
+ " emit(doc.seriesName, doc.season)"
+ "}");
get_numberOfSeasonsMR.setReduce(
"function (key, values, rereduce) {"
+ "return Math.max.apply({}, values)"
+ "}");
Map<String, MapReduce> view = new HashMap<>();
view.put("get_numberOfSeasons", get_numberOfSeasonsMR);
designDocument.setViews(view);
dbClient.design().synchronizeWithDb(designDocument);
int count = dbClient.view("mydesign/get_numberOfSeasons").key("Arrow").queryForInt();