I'm new and I need help with arrays

Processing Beginners
1

Hello everyone!

I’m new to the world of programming and need help with arrays. I have to do a practice where I have a multidimensional array (attached image) where the first column appears the position X and the second position Y of a String that I have where the name of 18 city appears.

I have to place on an image the name of each city. My doubt is that I do not know how I can do so that with the text function insert a variable that corresponds to the X or Y position of the array.

I would really appreciate any kind of help

Captura de pantalla 2022-06-02 a las 17.58.28

2

You could save the Strings in an seperate array. And when iterating over the first list can access the corrosponding member in the String array and use that as text.

3

Hi @JosepAlqueza ,

You can access the array this way.
What about the 3rd column? Is this a id for the cityname !?

void setup() {
   size(1500,1000);
}

void draw() {
    background(0);
    fill(255);
    for(float[] city : cities) {
       float x = city[0];
       float y = city[1];
       float id = city[2]; // what is that number? Id of another array with the citynames ?
       String cityname = "dummy"; // ie citynames[floor(id)] !?
       text(cityname,x,y);
    }
}

If it is 3rd not the id you can extend it by one column and give the entries a number from 0 to rows-1 and make a string array … ie

float[][] cities = {
{232,654,2344555,0},
{554,755,2344555,1}
};

String[] citynames = {
      "cityname1",
      "cityname2"
       // and so on
};

// Then in the above code
// ....
       float id = city[3]; 
       String cityname = citynames[floor(id)];
//....

Cheers
— mnse

1 Like
4

Hy mnse,

Thanks for your help. It helped me solve my problem.

The third column is the population of every different city

1 Like