Hello,
I am trying to figure out what could be the problem with my code. I am sort of following Ben Fry's example of locations on a map but with countries instead of his example of U.S. states. I have two classes: Data_Visualization and Loader. I have also added all the files I need for this to run. I know I have a ton of errors but I was hoping maybe I could get some help with this. Thanks.

Data_Visualization class:

PImage mapImage;
int rowCount;

Loader dataTable, locationTable;
float dataMin = MAX_FLOAT;
float dataMax = MIN_FLOAT;

void setup() {
 size(720, 360);
 mapImage = loadImage("world_outline_map_720.jpg");
 locationTable = new Loader("locations.csv");
 rowCount = locationTable.getRowCount();
 //Read the data table
 dataTable = new Loader("values.csv");

 //Finding the min and max values
 for(int row = 0; row < rowCount; row++){
   float value = dataTable.getFloat(row, 1);
   if(value > dataMax){
     dataMax = value;
   }
   if(value < dataMin){
     dataMin = value;
   }
 }

}
void draw(){
 background(255);
 image(mapImage,0,0);

 //Drawing attributes for the ellipses
 smooth();
 fill(192,0,0); //red
 noStroke();

 //Draw a data point for each location

 for(int row = 0; row < rowCount; row++){
   String abbrev = dataTable.getRowName(row);
   float x = locationTable.getFloat(abbrev, 1);
   float y = locationTable.getFloat(abbrev, 2);
   drawData(x, y, abbrev);
 }


 //Map the size of ellipse to the data value
 void drawData(float x, float y, String abbrev){
   float value = dataTable.getFloat(abbrev, 1);
   float mapped = map(value, dataMin, dataMax, 2, 40);
   ellipse(x, y, mapped, mapped); //draw the ellipse
 }

 //Loop through the rows of the location file and draw the points.
 for(int row = 0; row < rowCount; row++){
   float x = locationTable.getFloat(row, 1);
   float y = locationTable.getFloat(row, 2);
   ellipse(x,y,9,9);
 }
}


Loader class:

class Loader {
 String[] lines;
 int rowIndex;

 Loader(String filename){
   lines = loadStrings("locations.csv");
   // lines = loadStrings("values.csv");
   println("there are " + lines.length + " lines");
 }

 int getRowCount(){
   return lines.length;
 }



 float getFloat(int rowIndex, int column){
   String x = lines[rowIndex];
   String[] y = split(x,',');
   return(Float.parseFloat(y[column]));
 }

 public float getFloat(int rowName, int column){
  String a = lines[rowName];
  String[] b = split(a,',');
  return(Float.parseFloat(b[column]));
  //return parseFloat(rowName, column);
  }

 String getRowName(int row){
   return;
 }
}

I got my project to run with the ellipses matching my locations file to the countries, but now I can't get the project to run when I try to set Min and Max values for the ellipses. For example I have China as one of my countries so the map should show that ellipse as the largest. (In my values.csv file, China has the largest value).

The error I am getting right now is "unexpected token: void"
This is on the line: void drawData(float x, float y, String abbrev){

Thanks for the other suggestion.

Quote:


This is now two separate functions.
As I said before, I don't have your files so I can't run this myself.
After you make this change, are there still problems?

"Ctrl + t" is your friend.
It'll neaten your code right up and let you spot problems like this.

Unfortunately I still get errors. It now says it can't find a class or type named "Loader" and highlights the line: Loader dataTable, locationTable;