How to show math symbols like theta

Question

I'm trying to find a way to show math symbols such as \theta, \phi, \dot{\theta}, ..., etc. I couldn't find a way to show these letters in my plot. Does qcustomplot support math symbols? I've tried the following line but very few letters show up but the rest doesn't.

ui->customPlot1->graph(0)->setName(QString("\u0024"));

Baize

You need to create a QString properly. doc.qt.io/qt-4.8/qstring.html#fromUtf8 doc.qt.io/qt-4.8/qstring.html#fromUtf16 – Convertite

The correct name for these symbols is greek. Greek symbols are available in some encodings. UTF8 is one of them. As n.m. noticed you just need to properly create a QString from unicode string. – Lightfingered

@teivaz, I used theta as an example. Not all math symbols are Greek. – Baize

@Baize If you're looking for analogue of LaTex than it seems that there is no support for it right now. – Lightfingered

@Baize Does your font support those symbols? – Jeremiahjeremias

Answer 1

In my Qt GUI in Windows 7, the following line worked

 title->setText(QString::fromWCharArray(L"\u03B8\u2081(t) vs \u03B8\u2081\u1d48(t)"));

The result is

where \u03B8 is \theta, \u2081 is subscript one, and \u1d48 is subscript d. For the rest of charaters, see this link.

Baize

Answer 2

What you are looking for is:

ui->customPlot1->graph(0)->setName(QString::fromUtf8("\u03B8"));

This for example will give you the small letter theta. Use UTF-8 Encoding Table and Unicode Characters to get your desired letters code.

Photokinesis

This is exactly what I've done but didn't work. Your code shows me a question mark in my plot. – Baize

@Baize If you can post more from your code and maybe some more information about that question mark so I will be able to look for the reason. I am currently also working on qcustomplot code and I just tried this on my plot and it worked. – Photokinesis

@Baize what are your OS and compiler? – Convertite

@n.m. Windows 7 and Qt. – Baize

Windows doesn't particularly like utf8, you may have to type each individual byte in the \xPQ notation. Or try fromUtf16 and a wide string. – Convertite