QwtPlot : hello world! simple instructions for the first 2d plot

[FelixB]

As about these famous examples,they are the funniest examples ever. They should not call "examples", it's a confusing title.They should be called "Demo", as they simple demonstrate what qwt can do. These examples are totally a waste of time because they are simply oriented and helpful for someone who ALREADY knows qwt well.

I started with qwt some weeks ago. I didn't know anything about it - now I have created a complex image analysis tool with several qwt plots. The examples helped me a lot: installing a zoomer, setting plot markers, creating a spectrogram... yes, the documentation could be better. But don't forget - qwt is not a commercial tool! So you better thank Uwe for programming all this gerat things instead of blaming him because you miss better tutorials.

[fatecasino]

@Uwe
it's not about being rude, but simply being sincere. Of course there are thousands of downloads as long researchers don't want to give their money to MATLAB. BUT, in the fora there are lots of puzzled people asking about linking problems (haven't you googled it?). Sure, "CONFIG += qwt" was in my .pro files since the very first day and that didn't help that much. I included "/usr/local/qwt-6.0.0-rc5/include" (other locations in the end)and not so much progress. After that point I started googling it. In order to compile and make qwt you have probably to add several other lines in the .pro. Everyone suggests something completely different, and you end up totally confused. The official installation instructions are not detailed and explicit. In other words, of course I know i have to link the new libraries, but what can you do when the proper/obvious way does not work.

@FelixB
A non-commercial software product is still a product, and i don't see the reason of having lower quality standards than those of the commercial ones. Free does not necessarily mean unsupported. Look at http://qwt.sourceforge.net/ for example. It's the most discouraging software product web page I have ever seen. It looks as it has been designed back in '90s.

Anyway, I do not mean of being mean or rude. It's just I think that unbiased criticism is a good base for progress. With a better website and analytical documentation tutorials, qwt would have an even greater success and popularity among programmers.

[Uwe]

Of course there are thousands of downloads as long researchers don't want to give their money to MATLAB.

No, Qwt is not a replacement for MATLAB - it's not even intended to be one. It's an extension of the Qt library for writing Qt applications with a technical background. The intended audience are developers of Qt applications - assuming a certain level of experience with C++ and Qt and their favorite operating system.

But indeed there are users that expect a replacement of MATLAB, where they get things done without having to dive into details of software development. Exactly those users are sometimes frustrated, when they notice, that writing a Qt/Qwt application is above their head.

After that point I started googling it. In order to compile and make qwt you have probably to add several other lines in the .pro. Everyone suggests something completely different, and you end up totally confused.

You are using a release candidate of Qwt 6, while most of the postings are for earlier Qwt releases.

Again, why don't you simply follow the steps documented in the INSTALL file. When you run into a problem report it here with informations about your environment and the steps you did - instead of ...

Look at http://qwt.sourceforge.net/ for example. It's the most discouraging software product web page I have ever seen. It looks as it has been designed back in '90s.

Well - not discouraging enough for you.

I'm completely uninterested in spending time on designing web pages and if nobody else is doing something nicer it will probably never change. Please note, that I don't want to sell something !

Uwe