Using Qwt with QVector

Okay so I may get flamed here but I have to ask anyway.

can anyone point me to a good example of using a QVector in a qwt plot. I should point out that I have scoured the web etc but also being a complete noob I get stuck quite often. I am slowly bringing myself up to speed.

In short I have a QVector of floats that I have read in from a binary file and I want to plot them in qwt. And this is where I come apart. I have tried and failed miserably. Generally once I see a very simple example I can get myself off and running. I started to go down the QwtArraySeriesData route and gort myself completely lost in "cannot allocate an object of abstract type" errors. Yes I am a super beginner but everyone has to start somewhere right?

I would have posted this in the newbie forum but suspected it would get moved to here anyway. Any help or simple example/s are appreciated.

Cheers
Oz

Hi,

how do you want to plot a series of floats? for each point, you need an x- and a y-value.

assuming, you have a QVector with x-values and a QVector with y-values, you can use "SetSamples(...)" (or thelike) to add your points to a curve. have a look at the documentation of QwtPlotCurve and you'll find the appropriate method.

hth,
Felix

Hi Felix,

I will have a look and see how I go. So is using QwtArraySeriesData the wrong way to go then?

it depends on how you have your data. if you have two QVector, you don't have to care about any data object - it will be created internally.