I need to change the default DateTickUnit settings for different zoom levels for a TimeseriesChart, but can´t find the place i need to read in the documentation? I would greatly appreciate a pointer.
Here is the Java API for TimeSeriesChartDemo1: http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/demo/TimeSeriesChartDemo1.html
The zoom levels documentation will be found in one of the inherited methods. I would recommend finding the exact component that requires the zoom to be changed on. Then checking the API for that java.awt component
DateAxis has two static factories for creating standard date tick units. These methods, createStandardDateTickUnits(), describe how "to create your own collection." The setTickUnit() methods replace the default with your own DateTickUnit. The constructor having a DateFormat is particularly convenient.
If this is terra incognita, I'd recommend The JFreeChart Developer Guide†.
†Disclaimer: Not affiliated with Object Refinery Limited; just a satisfied customer and very minor contributor.
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I Am working with flink 1.15.2, should i use Row or GenericRowData that inherit RowData for my own data type?, i mostly use streaming api.
Thanks.
Sig.
In general the DataStream API is very flexible when it comes to record types. POJO types might be the most convenient ones. Basically any Java class can be used but you need to check which TypeInformation is extracted via reflection. Sometimes it is necessary to manually overwrite it.
For Row you will always have to provide the types manually as reflection cannot do much based on class signatures.
GenericRowData should be avoided, it is rather an internal class with many caveats (strings must be StringData and array handling is not straightforward). Also GenericRowData becomes BinaryRowData after deserialization. TLDR This type is meant for the SQL engine.
The docs are actually helpful here, I was confused too.
The section at the top titled "All Known Implementing Classes" lists all the implementations. RowData and GenericRowData are described as internal data structures. If you can use a POJO, then great. But if you need something that implements RowData, take a look at BinaryRowData, BoxedWrapperRowData, ColumnarRowData, NestedRowData, or any of the implementations there that aren't listed as internal.
I'm personally using NestedRowData to map a DataStream[Row] into a DataStream[RowData] and I'm not at all sure that's a good idea :) Especially since I can't seem to add a string attribute
After reading through some of the React Native docs I was left wondering where the term 'vend' comes from. Can anyone elucidate the etymology of 'vend' or whether the word could benefit from a more expansive definition than the procedural one given in the docs (this one is from the React Native iOS docs):
Vending a view is simple:
Create the basic subclass.
Add the RCT_EXPORT_MODULE() marker macro.
Implement the -(UIView *)view method
In this case, vend is synonymous with 'serve'. Try replacing each instance of 'vend' with 'serve' and it should make sense to you.
The key is to make the RCTMapManager a delegate for all the views it vends, and...
.
You can see we're setting the manager as the delegate for every view that it vends, then...
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These subclasses are similar in function to view controllers, but are essentially singletons - only one instance of each is created by the bridge. They vend native views to the RCTUIManager, which...
I'm working on a Hydra documentation generator for Golang. I've been using the demo as an example and I was wondering about the ambiguity in some hydra terms.
What's the difference between hydra:title and rdfs:label? label is used in vocab:User, but hydra:title is used for Resource and Collection, as well as in properties.
Speaking of Resource and Collection, why are they re-described in this ApiDocumentation? Shouldn't they be part of hydra/core?
In many properties, there's both a hydra:title + hydra:description and label + description that contain the same information. Why is that? Can I ignore one and be fine?
Apologies in advance if I failed to spot that in the spec, but I've only recently gained an interest in hypermedia APIs and many concepts are still a bit hazy.
• What's the difference between hydra:title and rdfs:label?
rdfs:label is used for the vocabulary definition itself. hydra:title is used to overwrite that label in Hydra clients (that use it for instance to render forms). This was the first issue that was opend when Hydra's further development was moved into a W3C Community Group: Hydra ISSUE-1
• Speaking of Resource and Collection, why are they re-described in this ApiDocumentation? Shouldn't they be part of hydra/core?
They are part of the Hydra Core Vocabulary. As such, it isn't necessary to re-describe them. It was an implementation shortcut I took.
• In many properties, there's both a hydra:title + hydra:description and label + description that contain the same information. Why is that? Can I ignore one and be fine?
See the answer to the first question. In general, you should prefer the Hydra versions in a Hydra-specific tool but fall back to the rdfs properties.
Btw. there's a dedicated mailing list for Hydra. Join the W3C Community Group if you are interested in influencing the future development of Hydra. You should definitely announce your documentation generator there as well.
I am looking for a way to render a StackedAreaChart with splines
I guess I am after some StackedSplineAreaChart
XYSplineRenderer is doing a nice job but does not cover areas
Is there a trick to render AreaCharts with splines?
Neither StackedAreaRenderer nor StackedXYAreaRenderer currently (JFreeChart 1.0.15) do have support for splines. The feature you are requesting is currently not supported by JFreeChart.
However, for the StackedXYAreaRenderer it shoudn't be too hard to enhance it to support splines, based on the XYSplineRenderer implementation. You would need to create your own renderer class and override the drawItem() method.
Can any one please provide me the Source Code for "ScatterPlotDemo1" which comes with "JfreeChart DevloperGuide".I am developing exactly the same Application so it would be very helpful for me if I can get the code for the following Image attached.
Thanks very Much
http://www.jfree.org/jfreechart/images/ScatterPlotDemo1.png
Any one of these recent scatter plot demos would probably be a better starting point. The only difference is the demonstration dataset. ScatterPlotDemo1 is not hard to find, but the required SampleXYDataset2 is less than exemplary. I'd look at nextGaussian() to vary the slope of a line.
As you use the library frequently, I'd recommend The JFreeChart Developer Guide†.
†Disclaimer: Not affiliated with Object Refinery Limited; just a satisfied customer and very minor contributor.
http://code.google.com/p/uidesign/source/browse/trunk/UIDProject/src/testers/ScatterPlotDemo1.java?spec=svn19&r=19