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DATA

by Jean Pierre Charalambos
Universidad Nacional de Colombia
Presentation best seen online
See also the source code

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Index

1. Tabular data

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Tabular data methods

LoadTable

Table table = loadTable("data.csv");

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Tabular data methods

Reading data

x	y	diameter	name
160	103	43.19838	Happy
372	137	52.42526	Sad
273	235	61.14072	Joyous
121	179	44.758068	Melancholy

int val1 = table.getInt(2, 1);      // val now has the value 235
float val2 = table.getFloat(3, 2);  // val2 now has the value 44.758068
String s = table.getString(0, 3);   // s now has the value “Happy”

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Tabular data methods

TableRaw object

x	y	diameter	name
160	103	43.19838	Happy
372	137	52.42526	Sad
273	235	61.14072	Joyous
121	179	44.758068	Melancholy

TableRow row = table.getRow(2); // Gets the third row (index 2)
int x = row.getInt("x"); // 	    // x has the value 273
int y = row.getInt("y");            // y has the value 235
float d = row.getFloat("diameter"); // d has the value 61.14072
String s = row.getString("name");   // s has the value “Joyous”

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Tabular data methods

getRowCount()

for (int i = 0; i<table.getRowCount(); i++) {
  // Access each row of the table one at a time, in a loop.
  TableRow row = table.getRow(i);
  float x = row.getFloat("x");
  float y = row.getFloat("y");
  float d = row.getFloat("diameter");
  String n = row.getString("name");
  // Do something with the data of each row
}

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Tabular data methods

Write data

//Create a new row.
TableRow row = table.addRow();
//Set the values of all columns in that row.
row.setFloat("x", mouseX);
row.setFloat("y", mouseY);
row.setFloat("diameter", random(40, 80));
row.setString("name", "new label");
saveTable(table, "data/data.csv");

Refer to save table

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Tabular data methods

Other useful commands

Table table = loadTable("data.csv", "header"); //see https://processing.org/reference/loadTable_.html)
removeRaw()
findRows()
matchRows()

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References

• Data