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Beginner needs help with image mapping

[1 Reply]
- 21-Aug-2012 01:43 PM
- Forum: Programming Questions
So I have this nearly figured out, I am trying to source data from a .csv, to map to an image (.png) preferably, it is very close right now, my only problem is that the image comes back with a diagonal from top-left to bottom-right, where above is sourcing the data properly and below is black(background) I know some one out that can solve this in seconds, thank you very much

martymart

int rows, cols;

int[][] data; // this is the 2D-array, where the data shall be stored

void setup() {

String[] lines = loadStrings("CSV_100X100.csv"); // lets assume, you have comma-seperated values

rows = lines.length;

cols = split(lines[0], ',').length;

// initialize data-array

data = new int[cols][rows];

// parse data-file

for (int row =0; row<lines.length; row++) {

// split current line by ','

String[] values = split(lines[row],',');

// loop through the values of that line

for (int col =0; col<values.length; col++){

// store value in your array

data[col][row] = int(values[col]);

stroke(data[row][col]);

point(row, col);

}

}

}

Beginner working on Saving Array Image, Please Help

[10 Replies]
- 20-Aug-2012 09:15 AM
- Forum: Programming Questions
I have just started with processing and need a little help here.
I am trying to source some data and apply it to a 2d array image,

I am sure that this example file is along the right lines for what I need,

I just need to be able to input a specific array rather than random, either from .txt or .xls, and then to save the image,

I know this is very basic, just getting started, thanks for any help
```
// Example: 2D Array size(200,200); int cols = width; int rows = height; // Declare 2D array int[][] myArray = new int[cols][rows]; // Initialize 2D array values for (int i = 0; i < cols; i++) { for (int j = 0; j < rows; j++) { myArray[i][j] = int(random(255)); } } // Draw points for (int i = 0; i < cols; i++) { for (int j = 0; j < rows; j++) { stroke(myArray[i][j]); point(i,j); } }
```

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