vertical alignment of tikzpicture with text

Question

I would like to use underbrace in order to clarify some text and after some searching I found a solution using the Tikz package. However I am having some trouble with the vertical alignment. Here is a MWE of illustrating my problem:

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{matrix}
\usetikzlibrary{decorations.pathreplacing}

\tikzstyle{underbrace style}=[decorate,decoration={brace,raise=0.5mm,amplitude=3pt,mirror,pre=moveto,pre length=1pt,post=moveto,post length=1pt}]
\tikzstyle{underbrace text style}=[font=\tiny, below, pos=.5, yshift=-1mm]

\newcommand{\tikzunderbrace}[2]{\draw [underbrace style] (#1.south west) -- (#1.south east) node [underbrace text style] {#2};}

\begin{document}

Begining text
\begin{tikzpicture}
\matrix[matrix of nodes, inner sep=0pt, column sep=0pt, nodes={anchor=south}, text height=1.5ex,text depth=.25ex]{
\node (text) {some underlined text};\\
};
\tikzunderbrace{text}{explanation}
\end{tikzpicture}
and some more text

\end{document}

Here is the result that I get:

As you can see, the text is vertically not aligned. After searching some more, I realized that I have to add an option to the tikzpicture environment.

I tried the following option [baseline={(text.south)}] which gave me the following result:

as well as [baseline={([yshift={-\ht\strutbox}]text.north)}], which gave me the following result:

As you can see, in both cases the alignment is not good. I would like the entire text to appear on the same line.

Could someone please help me out with what parameters I need to use in order to achieve proper vertical alignment? Thank you very much in advance.

PS. I am using the matrix environment because my actual document is more complicated than what I am showing here. I've just stripped it down for the case of a MWE.

Answer 1

\documentclass{article}
\usepackage{amsmath}
\newcommand{\explan}[2]{$\underbrace{\text{#1}}_\text{#2}$}

\begin{document}

Begining text \explan{some underlined text}{explanation} and some more text

\end{document}

Answer 2

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{tikzmark}
\usetikzlibrary{matrix}
\usetikzlibrary{decorations.pathreplacing}

\tikzstyle{underbrace style}=[decorate,decoration={brace,raise=0.5mm,amplitude=3pt,mirror,pre=moveto,pre length=1pt,post=moveto,post length=1pt}]
\tikzstyle{underbrace text style}=[font=\tiny, below, pos=.5, yshift=-1mm]

\newcommand{\tikzunderbrace}[2]{\draw [underbrace style] (#1.south west) -- (#1.south east) node [underbrace text style] {#2};}

\begin{document}

You should use  \tikzmarknode{N1}{the tikzmark library} to underbrace your text.

\begin{tikzpicture}[overlay,remember picture]
    \tikzunderbrace{N1}{explanation}
\end{tikzpicture}

\end{document}

Please note that you will have to compile at least twice in order to get your picture correctly positionned.

Answer 3

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{matrix}
\usetikzlibrary{decorations.pathreplacing}

\tikzstyle{underbrace style}= [decorate,decoration={brace,raise=0.5mm,amplitude=3pt,mirror,pre=moveto,pre length=1pt,post=moveto,post length=1pt}]
\tikzstyle{underbrace text style}=[font=\tiny, below, pos=.5, yshift=-1mm]

\newcommand{\tikzunderbrace}[2]{\draw [underbrace style] (#1.south west) -- (#1.south east) node [underbrace text style] {#2};}

\begin{document}
    
    Begining text
    \begin{tikzpicture}[baseline=-0.12cm]
        \matrix[matrix of nodes, inner sep=0pt, column sep=0pt, ]{
            \node (text) {some underlined text};\\
        };
        \tikzunderbrace{text}{explanation}
    \end{tikzpicture}
    and some more text
    
\end{document}