Assign specific value to axis

deleted286

For axis Y, I want to assing specific line. I have a txt file for reading. I want to assign axis Y the 3rd column. How can i do it?

QDateTimeAxis *axisX = new QDateTimeAxis; 
     axisX->setTickCount(5); 
     axisX->setFormat("MMM yyyy"); 
     axisX->setTitleText("Date"); /
     chart->addAxis(axisX, Qt::AlignBottom);
     series->attachAxis(axisX);

     QValueAxis *axisY = new QValueAxis();
     axisY->setTitleText("Values");
     axisY->setLabelFormat("%g");
     chart->addAxis(axisY, Qt::AlignLeft);
     series->attachAxis(axisY);

jsulm

@suslucoder said in Assign specific value to axis:

I want to assign axis Y the 3rd column. How can i do it?

The axis does not know anything about that file and columns inside it. You simply need to read your file and put data from that third column as data for Y axis. See https://doc.qt.io/qt-5/qxyseries.html
If you read documentation https://doc.qt.io/qt-5/qxyseries.html#append you will see that you have to provide X AND Y...