I want to publish two 3D graphs on one segmented window but the problems is that the end sketch seems to be distorted. This method seems to work with 2D graphs but I cant get it to work for 3D graphs. I cant seem to figure out what the problem is so any help would be much appreciated. This is what I am trying to generate:-

I am trying to plot X, Y and Z coordinates on a 3D landscape using PVector. How do I go about doing this?

I am working on a 3D scatter plot and I want to make the points furthest away form the screen to appear smaller than the once closer to the screen. I understand that using perspective() would be the best way to do it but I cant seem to get it to work. Does anybody know how to get it to work? I have attached the codes that I have done so far (thank you amnon.owned for the preliminary sketch);

Has anybody managed to create a 3D scatter plot in this forum, if yes could you please get in touch or advise on how I should go about it? Have been working on it for whole of past week and I really havent made and progress. 

I was trying out a few sketches from 'Getting Started with Processing' and I keep encountering "Unexpected token:Bee". I have checked the curly brackets and the semi-colon and everything seems to be fine. Dose anybody know how I can resolve this problem? 

I have been trying to create a 3D scatter plot but I cant seem to figure out how. Any help would be much appreciated.

I am creating a sketch which is capable of publishing a scatter plot and parallel plot on two different pages. Both the sketches work perfectly when I run them individually but when I run them as a single sketch with two page then one sketch works but the other generates an error message. The code is provided below and the source of the error is highlighted in red. How do I resolve the NullPointerException error? 

I have created two different sketches but I want fuse them together to form a single sketch and I want to be able to toggle between the the sketches by a press of a key or by clicking a tab.How do I do this?

I have just recently started working with Processing but I have not had a programming background whatsoever. What would you PROs recommend that I do to become better in what I do?

I am trying to create a scatter plot diagram but I am stuck half way through. The error message( ArrayIndexOutOfBoundsException:-1) seems to arise from the line in 30. I cant seem to figure out what the problem is, any help would be much appreciated.

1. import org.gicentre.utils.stat.*;    // For chart classes.
2. import org.gicentre.utils.colour.*;  // For colour tables.
3. XYChart scatterplot;    // The data chart.
4. float[] colours;        // Point colours.
5. void setup()
6. {
7.   size(400,400);
8.   smooth();
9.  
10.   scatterplot = new XYChart(this);
11.  
12.   readData(2,3,scatterplot);    // Read data from columns 1 and 3.
13.  
14.   // Set up scatterplot's appearance.
15.   scatterplot.setMinX(0);
16.   scatterplot.setMinY(0);
17.    
18.   scatterplot.showXAxis(true);
19.   scatterplot.showYAxis(true);
20.   scatterplot.setXAxisLabel(">15");
21.   scatterplot.setYAxisLabel("<15");
22.  
23.   ColourTable cTable = ColourTable.getPresetColourTable(ColourTable.ACCENT_3);
24.   scatterplot.setPointColour(colours,cTable);
25.   scatterplot.setPointSize(5);
26. }
27. void draw()
28. {
29.   background(255);
30.   scatterplot.draw(10,10,width-20,height-20);
31. }

Hello guys I am new to processing and I am finding it hard to understand the logic behind certain functions.

I am trying to create a simple scatter-plot graph to find the correlation between two entities and im using Ben Fry’s book to figure out the method. The method in Ben Fry’s book provides an example for Time Series;

1. FloatTable data;
2. float dataMin, dataMax;
3.  
4. float plotX1, plotY1;
5. float plotX2, plotY2;
6.  
7. int yearMin, yearMax;
8. int[] years;
9.  
10.  
11. void setup() {
12.   size(720, 405);
13.  
14.   data = new FloatTable("alcohol.tsv");
15.  
16.   years = int(data.getRowNames());
17.   yearMin = years[0];
18.   yearMax = years[years.length - 1];
19.  
20.   dataMin = 0;
21.   dataMax = data.getTableMax();
22.  
23.   // Corners of the plotted time series
24.   plotX1 = 50;
25.   plotX2 = width - plotX1;
26.   plotY1 = 60;
27.   plotY2 = height - plotY1;
28.  
29.   smooth();
30. }
31.  
32.  
33. void draw() {
34.   background(224);
35.  
36.   // Show the plot area as a white box
37.   fill(255);
38.   rectMode(CORNERS);
39.   noStroke();
40.   rect(plotX1, plotY1, plotX2, plotY2);
41.  
42.   strokeWeight(5);
43.   // Draw the data for the first column
44.   stroke(#5679C1);
45.   drawDataPoints(0);
46. }
47.  
48.  
49. // Draw the data as a series of points
50. void drawDataPoints(int col) {
51.   int rowCount = data.getRowCount();
52.   for (int row = 0; row < rowCount; row++) {
53.     if (data.isValid(row, col)) {
54.       float value = data.getFloat(row, col);
55.       float x = map(years[row], yearMin, yearMax, plotX1, plotX2);
56.       float y = map(value, dataMin, dataMax, plotY2, plotY1);
57.       point(x, y);
58.     }
59.   }
60. }

How should I modify this code to plot points for two float values(one depicting the x value and the other depicting the y value)? Any help would be much appreciated…