qwt problem

[robotics]

please provide me simple example of how to make a simple plot only consisting of axes only..........
I just want to check my qwt ...
please help me..

[FelixB]

can you compile the examples delivered with qwt?

[norobro]

As FelixB says, compiling the examples is the best test.

However, by creating "plot" on the heap and using setSamples() in lieu of setRawSamples() your code works for me (Qwt 6.0.0-rc3):

void MainWindow::on_pushButton_clicked()
{
    double xval[5]={10,20,30,40.4,50};
    double yval[5]={1,2.2,3,4,5};
    QwtPlot *plot = new QwtPlot(QwtText("CppQwtExample1"));
//    plot->setTitle("first plot");
    plot->setTitle("first_plot");
    plot->setAxisTitle(QwtPlot::xBottom, " System time [h:m:s]");
    plot->setAxisScale(QwtPlot::xBottom, 0,60 );
    plot->setAxisTitle(QwtPlot::yLeft, "Degree");
    plot->setAxisScale(QwtPlot::yLeft, -60,60 );
    plot->setAutoReplot(true);  // not needed
    QwtPlotCurve *curve1 = new QwtPlotCurve("Curve 1");
    curve1->setPen(QPen(Qt::blue));
    curve1->setSamples(xval,yval,5);
    curve1->attach(plot);
    plot->replot();   // not needed
    plot->show();
}

void MainWindow::on_pushButton_clicked()
{
    double xval[5]={10,20,30,40.4,50};
    double yval[5]={1,2.2,3,4,5};
    QwtPlot *plot = new QwtPlot(QwtText("CppQwtExample1"));
//    plot->setTitle("first plot");
    plot->setTitle("first_plot");
    plot->setAxisTitle(QwtPlot::xBottom, " System time [h:m:s]");
    plot->setAxisScale(QwtPlot::xBottom, 0,60 );
    plot->setAxisTitle(QwtPlot::yLeft, "Degree");
    plot->setAxisScale(QwtPlot::yLeft, -60,60 );
    plot->setAutoReplot(true);  // not needed
    QwtPlotCurve *curve1 = new QwtPlotCurve("Curve 1");
    curve1->setPen(QPen(Qt::blue));
    curve1->setSamples(xval,yval,5);
    curve1->attach(plot);
    plot->replot();   // not needed
    plot->show();
}

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[robotics]

please provide me some examples..........and .pro file if you can........
that would be very helpful for me..
I am not been able to start
I am stuck here in my project.....
your help shall be highly appreciated...

[TimeBomb]

C:\Qt\2010.05\qwt-build-desktop\debug\qwt.exe exited with code -1073741511

We can get a lot more information if you actually use the debugger to find your errors. A problem like the above with -no other data- occurs 99% of the time without a debugger.

[FelixB]

please provide me some examples..........and .pro file if you can........
that would be very helpful for me..

you downloaded the qwt sources, didn't you? then you already have examples. these are in a directory called "examples" (surprisingly, isn't it?) in your qwt directory...