Okay, I could fix the issue. The problem was my statement for resetting the plot.
I used the following:
for( int g=0; g<3; g++ )
{
ui->plot_acceleration->graph(g)->data().clear();
}
ui->plot_acceleration->replot();
Then I tried the following like it is mentioned here:
pq_plot->graph(g)->data().data().clear();
But then the error occurs:
error: member reference type 'QCPDataContainer<QCPGraphData> *' is a pointer; did you mean to use '->'?
Then I used the autocorrection of Qt creator ('->' instead of ' . ')
for( int g=0; g<3; g++ )
{
ui->plot_acceleration->graph(g)->data().data()->clear();
}
ui->plot_acceleration->replot();
And it is working now. Still don't know what exactly happens with the plot, when I use the first statement... When I use the first statement the plots are also gone after clicking on reset...
