Using Sencha GXT 3.0 is it possible to generate a line chart and populate it with a dynamic number of line series fields, and if so, what is the recommended method?
I know multiple series fields can be added to a chart, but the line chart examples (and the other chart examples for that matter) make use of an interface which extends PropertyAccess<?> and the interface specifies a static number of expected fields (e.g. data1(), data2(), data3(), etc.). If the interface is to be used to specify the fields to add to the chart, how could you account for a chart which may require n number of fields (i.e. n number of line series on a given chart).
Example provided on Sencha's site:
http://www.sencha.com/examples/#ExamplePlace:linechart
I ran into the same issue. It would be a much nicer design if each series had a store instead of having one store per chart.
I had one long list of metric values in metricDataStore. Each metric value has a description. I wanted all the metric values with the same description displayed on one (and only one) series. I had my value providers for each series return null for both the x and y axis if the value wasn't supposed to be in the series.
This seems like a hack to me but it works for my usage:
myChart = new Chart<MetricData>();
myChart.setStore(metricDataStore);
.
.
.
for (MetricInfo info : metricInfoData) {
LineSeries<MetricData> series = new LineSeries<MetricData>();
series.setChart(myChart);
series.setSmooth(false);
series.setShownInLegend(true);
series.setHighlighting(true);
series.setYAxisPosition(Chart.Position.LEFT);
series.setYField(new MetricValueProvider(info.getName()));
series.setXAxisPosition(Chart.Position.BOTTOM);
series.setXField(new MetricTimeProvider(info.getName()));
myChart.addSeries(series);
}
.
.
.
private class MetricTimeProvider extends Object implements ValueProvider<MetricData, Long> {
private String metricName;
public MetricTimeProvider(String metricName) {
this.metricName = metricName;
}
#Override
public Long getValue(MetricData m) {
if (metricName != null && metricName.equals(m.getLongDesc()))
return m.getId();
else
return null;
}
#Override
public void setValue(MetricData m, Long value) {
}
#Override
public String getPath() {
return null;
}
}
private class MetricValueProvider extends Object implements ValueProvider<MetricData, Double> {
private String metricName;
public MetricValueProvider(String metricName) {
this.metricName = metricName;
}
#Override
public Double getValue(MetricData m) {
if (metricName != null && metricName.equals(m.getLongDesc()))
return m.getMetricValue();
else
return null;
}
#Override
public void setValue(MetricData m, Double value) {
}
#Override
public String getPath() {
return null;
}
}
Related
I am still new to the whole C# thing but I found this code posted from grovesNL about 5 years ago which I believe will work.
namespace DataAccessClass
{
public class FileReader
{
static void Main(string[] args)
{
List<DailyValues> values = File.ReadAllLines("C:\\Users\\Josh\\Sample.csv")
.Skip(1)
.Select(v => DailyValues.FromCsv(v))
.ToList();
}
}
public class DailyValues
{
DateTime Date;
decimal Open;
decimal High;
decimal Low;
decimal Close;
decimal Volume;
decimal AdjClose;
public static DailyValues FromCsv(string csvLine)
{
string[] values = csvLine.Split(',');
DailyValues dailyValues = new DailyValues();
dailyValues.Date = Convert.ToDateTime(values[0]);
dailyValues.Open = Convert.ToDecimal(values[1]);
dailyValues.High = Convert.ToDecimal(values[2]);
dailyValues.Low = Convert.ToDecimal(values[3]);
dailyValues.Close = Convert.ToDecimal(values[4]);
dailyValues.Volume = Convert.ToDecimal(values[5]);
dailyValues.AdjClose = Convert.ToDecimal(values[6]);
return dailyValues;
}
}
}
I am trying to read a csv file skipping the header and get it into a list that is accessible from another class. So my Architecture is DataAccessClass that has a class called FileReader and a class called Values. My task is to read this csv file into class FileReader and then to create an object list to hold it in the class Values. When I go to the Values class to call it I can't figure it out. This is how I am trying to call it. It is saying DailyValues.FromCsv(string) is a method that is not valid.
public List<string> GetList()
{
return DataAccessClass.DailyValues.FromCsv.dailyValues;
}
I want to be able to access this list further up the stack.
Your expression DataAccessClass.DailyValues.FromCsv.dailyValues is the culprit.
DataAccessClass.DailyValues.FromCsv is valid, and references the static method named FromCsv in the class DataAccessClass.DailyValues. But then going on by adding .dailyValues is incorrect. It is a method, nothing to peek into and extract stuff using ..
You could (if that was the intention) call the function, and directly work with the result:
DataAccessClass.DailyValues.FromCsv(some_csv_string) is an expression of type DailyValues. There you could then access - as an example - 'High' with:
DailyValues dv;
dv = DataAccessClass.DailyValues.FromCsv(some_csv_string);
dosomething(dv.High);
But for that to work, High would have to have the visibility of public.
I am new in hadoop and mapreduce programming and don't know what should i do. I want to define an array of int in hadoop partitioner. i want to feel in this array in main function and use its content in partitioner. I have tried to use IntWritable and array of it but none of them didn't work . I tried to use IntArrayWritable but again it didn't work. I will be pleased if some one help me. Thank you so much
public static IntWritable h = new IntWritable[1];
public static void main(String[] args) throws Exception {
h[0] = new IntWritable(1);
}
public static class CaderPartitioner extends Partitioner <Text,IntWritable> {
#Override
public int getPartition(Text key, IntWritable value, int numReduceTasks) {
return h[0].get();
}
}
if you have limited number of values, you can do in the below way.
set the values on the configuration object like below in main method.
Configuration conf = new Configuration();
conf.setInt("key1", value1);
conf.setInt("key2", value2);
Then implement the Configurable interface for your Partitioner class and get the configuration object, then key/values from it inside your Partitioner
public class testPartitioner extends Partitioner<Text, IntWritable> implements Configurable{
Configuration config = null;
#Override
public int getPartition(Text arg0, IntWritable arg1, int arg2) {
//get your values based on the keys in the partitioner
int value = getConf().getInt("key");
//do stuff on value
return 0;
}
#Override
public Configuration getConf() {
// TODO Auto-generated method stub
return this.config;
}
#Override
public void setConf(Configuration configuration) {
this.config = configuration;
}
}
supporting link
https://cornercases.wordpress.com/2011/05/06/an-example-configurable-partitioner/
note if you have huge number of values in a file then better to find a way to get cache files from job object in Partitioner
Here's a refactored version of the partitioner. The main changes are:
Removed the main() which isnt needed, initialization should be done in the constructor
Removed static from the class and member variables
public class CaderPartitioner extends Partitioner<Text,IntWritable> {
private IntWritable[] h;
public CaderPartitioner() {
h = new IntWritable[1];
h[0] = new IntWritable(1);
}
#Override
public int getPartition(Text key, IntWritable value, int numReduceTasks) {
return h[0].get();
}
}
Notes:
h doesn't need to be a Writable, unless you have additional logic not included in the question.
It isn't clear what the h[] is for, are you going to configure it? In which case the partitioner will probably need to implement Configurable so you can use a Configurable object to set the array up in some way.
I have 3 kinds of GameObject, namely blueBook, redBook and greenBook. There are 2 blueBook, 7 redBook and 4 greenBook in the scene.
They are each assigned with the following example script that have 3 properties.
public class blueBook : MonoBehaviour {
public string type = "BlueBook";
public string colour = "Blue";
public float weight;
float s;
void Start () {
float weightValue;
weightValue = Random.value;
weight = Mathf.RoundToInt (700*weightValue+300);
s=weight/1000; //s is scale ratio
transform.localScale += new Vector3(s,s,s);
}
// Update is called once per frame
void Update () {
}
}
In the new class, I want to take all the variables of the GameObject (type, colour, weight) and store them inside an array. How to do this?
After they are all stored inside the array, user will input an weight. Then another class will search through all the info to delete both the array and GameObject(in the scene) with the same amount of weight.
Thank you.
UPDATE
blueBook.cs
public class blueBook: MonoBehaviour {
public string type = "blueBook";
public string colour = "Red";
public float weight;
float s;
void Start () {
float weightValue;
weightValue = Random.value;
weight = Mathf.RoundToInt (500*weightValue+100);
s=weight/1000; //s is scale ratio
transform.localScale += new Vector3(s,s,s);
Debug.Log(weight);
}
// Update is called once per frame
void Update () {
}
}
block.cs
public class block: MonoBehaviour{
public List<GameObject> players;
void Start()
{ Debug.Log(players[1].GetComponent<blueBoook>().weight);
}
// Update is called once per frame
void Update () {
}
The debug.log for block.cs displayed 0 everytime eventho it display otherwise in debug.log of bluebook.cs. It is because it displayed the initial number? I don know wat is wrong
For all blocks in one list you can create a script that has a public list and you drag all your gameobjects into the list in the inspector.
using System.Collections.Generic;
public class ObjectHolder : MonoBehaviour
{
public List<GameObject> theBooks;
// You can remove by weight e.g. like this
public void DeleteByWeight(float inputWeight)
{
for(int i = theBooks.Count - 1; i >= 0; i--)
{
if(theBooks[i].GetComponent<Book>().weight == inputWeight)
Destroy(theBooks[i]);
theBooks.RemoveAt(i);
}
}
}
}
The script on the blocks needs to be renamed to the same name for all (Book in my example). From your code that is no problem since they only differ in the value of the members.
I have a graph computation that starts with a subset of vertices of a certain type and propagates information through the graph to a set of target vertices, which are also subset of the graph. I want to output only information from those particular vertices, but I don't see a way to do this in the various VertexOutputFormat subclasses, which all seem oriented to outputting something for every vertex in the graph. How do I do this? E.g., are there hooks for the output phase where I can filter output? Or am I supposed to write a VertexOutputFormat implementation that generates no output for the vertices that have no data? Thanks in advance.
You can simply extend the class and add an if-condition, that will do the trick.
For instance here a class which will print out only even vertex ids:
public class ExampleTextVertexOutputFormat extends
TextVertexOutputFormat<LongWritable, LongWritable, NullWritable> {
#Override
public TextVertexWriter createVertexWriter(
TaskAttemptContext context) throws IOException, InterruptedException {
return new ExampleTextVertexLineWriter();
}
/**
* Outputs for each line the vertex id and the searched vertices with their
* hop count
*/
private class ExampleTextVertexLineWriter extends TextVertexWriterToEachLine {
#Override
protected Text convertVertexToLine(
Vertex<LongWritable, LongWritable, NullWritable> vertex) throws IOException {
if (vertex.getId() % 2 == 0) {
return new Text(vertex.getId());
}
}
}
}
Im trying to override the getItemPaint() method of XYLineAndShapeRenderer by creating a subclass:
private class MultiRenderer extends XYLineAndShapeRenderer{
#Override
public Paint getItemPaint(int row, int column) {
if(row==2){
float x = getAmplitude()[column];
return floatToColor(x);
}
return super.getItemPaint(row, column);
}
private Color floatToColor(float val){...}
}
And calling:
XYPlot xyPlot = (XYPlot) myJFreeChartObject.getPlot();
MultiRenderer r = (MultiRenderer) xyPlot.getRenderer();
But im getting a ClassCastException. Is there a way I can cast this properly or override getItemPaint without creating a subclass? Im trying to plot 2 series as regular line plots and a 3rd series without a line and different color points. The first 2 series should have a line but no point markers.
Note getAmplitude() just returns an array of floats between 0 and 1
You can either use an Anonymous Inner Class
plot.setRenderer(new XYLineAndShapeRenderer() {
#Override
public Paint getItemPaint(int row, int column) {
if(row==2){
float x = getAmplitude()[column];
return floatToColor(x);
}
return super.getItemPaint(row, column);
}
private Color floatToColor(float val){...}
});
Or use a DrawingSupplier for your plot