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Hi

I am trying to use Qwt 5.0 (snapshot released 2006-01-03) to make a histogram, but I cannot find any documentation on it. I can only find the class documentation on verson 4.2.0 or similar on the internet (http://qwt.sourceforge.net/annotated.html). My supervisor wants me to continue using this version because it is the latest one.

Would anyone be able to help me make a simple histogram with this version of Qwt or point me to the right places? I would greatly appreciate it.

Thank you,

Barbora

Uwe,

Thank you for your response. It is helpful to have these references, but I am unfortunately still stuck. I cannot seem to be able to display a curve. I always end up with an empty graph.

I am trying to draw a line-graph-like histogram for now, so not the vertical bar graph. I have the following code (mostly copied from the sample code in the doc folder):

QwtPlot *myPlot;
myPlot = new QwtPlot(QwtText(" "), Lbl_Histogram);
double x[6]= {0,1,2,3,4,5}, y1[6] = {0,1,2,3,4,5};

QwtPlotCurve *curve1 = new QwtPlotCurve(QwtText("Curve 1"));

// copy the data into the curves
curve1->setData(x, y1, 6);
curve1->attach(myPlot);

// finally, refresh the plot
myPlot->replot();

What I end up with is an empty graph in my label. The x and y axes range from 0 to 5. Do you happen to know why I am missing the actual data points?

Thanks so much for your time,

Barbora