Help needed in creating heatmap

Processing Coding Questions
1

Hi there
I am new to Processing. I am trying to create a heat map using arduino and processing via serial communication. Arduino sending data in csv format
Xaxis, Yaxis, Sensor.
Xaxis, Yaxis, Sensor.
Xaxis, Yaxis, Sensor.
This is what I am doing at serialEvent

void serialEvent(Serial port)
{
data = port.readStringUntil(’.’);
data = data.substring(0, data.length() - 1);
index = data.indexOf(",");
xAxis = data.substring(0, index);
index2 = data.indexOf(",");
yAxis = data.substring (index+1 , index2);
sensor = data.substring (index+2 , data.length());
Something wrong there as I am not able to split string into variables properly.
I want to plot that in 2d heat image. I want to fill each pixel or rectangular blob with corresponding xy, with sensor data and it create heat map. I tried to plot but didn’t succeed. I want to hold pixels values in image until sensor update them. Any help with code will be appreciated. Thanks in advance.

2

You need to format your code. Edit your post. Highlight your code and press the icon </>.

Check these posts:

How to create a heatmap from list of X Y Points - Processing 2.x and 3.x Forum
Heat Map Color Resolution - Processing 2.x and 3.x Forum

I also recommend you post an mcve.

Kf