java - Displaying all XYSeries at once in jFreeChart for improving speed -


suppose need display multiple xyseries in single xyseriescollection. problem every time add xyseries, jfreechart wants update chart , slows down process of displaying multiple xyseries.

what want similar this:

// not update chart xyseriescollection.add(xyseries1) xyseriescollection.add(xyseries2)  ... xyseriescollection.add(xyseries10) // update chart

how can this?

construct new xyseriescollection having desired series, , invoke setdataset() on xyplot. generate single datasetchangeevent.

addendum: here's sscce updates n series, each having n2 values. performance question, example may helpful in profiling.

test image

import java.awt.borderlayout; import java.awt.dimension; import java.awt.eventqueue; import java.awt.event.actionevent; import java.util.random; import javax.swing.abstractaction; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jpanel; import org.jfree.chart.*; import org.jfree.chart.plot.xyplot; import org.jfree.data.time.day; import org.jfree.data.time.timeseries; import org.jfree.data.time.timeseriescollection; import org.jfree.data.xy.xydataset;  public class chartpaneltest {      private static final int n = 16;     private static final random random = new random();      private static xydataset createdataset() {         timeseriescollection tsc = new timeseriescollection();         (int j = 0; j < n; j++) {             timeseries series = new timeseries("data" + j);             day current = new day();             (int = 0; < n * n; i++) {                 series.add(current, random.nextgaussian());                 current = (day) current.next();             }             tsc.addseries(series);         }         return tsc;     }      private static jfreechart createchart(final xydataset dataset) {         jfreechart chart = chartfactory.createtimeserieschart(             "test", "day", "value", dataset, false, false, false);         return chart;     }      public static void main(string[] args) {         eventqueue.invokelater(new runnable() {             @override             public void run() {                 jframe f = new jframe();                 f.setdefaultcloseoperation(jframe.exit_on_close);                 xydataset dataset = createdataset();                 jfreechart chart = createchart(dataset);                 final xyplot plot = chart.getxyplot();                 chartpanel chartpanel = new chartpanel(chart) {                     @override                     public dimension getpreferredsize() {                         return new dimension(600, 300);                     }                 };                 f.add(chartpanel);                 jpanel p = new jpanel();                 p.add(new jbutton(new abstractaction("new") {                     @override                     public void actionperformed(actionevent e) {                         plot.setdataset(createdataset());                     }                 }));                 f.add(p, borderlayout.south);                 f.pack();                 f.setlocationrelativeto(null);                 f.setvisible(true);             }         });     } }

Comments

Post a Comment

Popular posts from this blog

jquery - How can I dynamically add a browser tab? -

since using iframes house external pages are, accounts "not preferred method" , disallowed sites (flickr, one), want dynamically generate browser tabs. e.g., when user submits form, want dynamically generate tab on browser in response submitted. e.g., might want add new tab url like: http://www.bigsurgarrapata.com/contact how in jquery? you want form target attribute action attribute. http://www.w3schools.com/tags/att_form_target.asp browsers have ultimate control on result of target attribute open new tab value of _blank. <form action="contact_submit.php" target="_blank" method="post">
Read more

keyboard - C++ GetAsyncKeyState alternative -

i using windows.h library's getasynckeystate function define key pushed on keyboard . here program returns int value of pushed key example. #include <iostream> #include <windows.h> using namespace std; int main (){ char i; for(i=8;i<190;i++){ if(getasynckeystate(i)== -32767){ cout<<int (i)<<endl; } } return 0; } but trying make opengl simple game , function appeared slow . there function not need cycle 180 times , if statement . thanks you're trying make opengl game, you're going use glfw. if that's case can away using glfwgetkey() such: if (glfwgetkey(glfw_key_up) == glfw_press) {...} if (glfwgetkey(glfw_key_down) == glfw_press) {...} that method nicely explained in tutorial 6 opengl-tutorial.org . should start first tutorial of beginners tutorials , later intermediate tutorials . if you're going make win32 window can listen wm_keydown or wm_keyup messages , virtua...
Read more

android - java.net.UnknownHostException(Unable to resolve host “URL”: No address associated with hostname) -

i developing app testing asp.net webservice in android.for simple webservice adding 2 numbers used.where numbers passed parameters.the result in dialogue.the webserver works in local. when application runs following result exception.i provided internet permission in manifest. java.net.unknownhostexception(unable resolve host “ http://url.com/ ”: no address associated hostname) my code given below main activity public static string rslt=""; /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); button b1=(button)findviewbyid(r.id.button1); final alertdialog ad=new alertdialog.builder(this).create(); b1.setonclicklistener(new onclicklistener() { @override public void onclick(view arg0) { // todo auto-generated method stub try { ...
Read more