Aligning tags in a table [Latex] [closed] - latex

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I am using the following code to create a table in Latex:
\begin{table}[]
\centering
\renewcommand{\arraystretch}{1}
\caption{Example table.}
\label{tab:model-testbed}
\renewcommand{\arraystretch}{1.1}
\resizebox{\linewidth}{!}{%
\begin{tabular}{|c|l|l|}
\hline
Comment & \multicolumn{1}{c|}{Device1} & \multicolumn{1}{c|}{Device2} \\ \hline
\begin{tabular}[c]{#{}c#{}}BlaBla \\ Sth \end{tabular} &
\begin{tabular}[c]{#{}l#{}}
\begin{equation}
\tag{1}\label{t3:1}
\begin{aligned}
y(x) = 66.1 + 1.11x - 1.28 \times 10^{-8}x^2 \\ +15.08 \times 10^{-2}x^1
\end{aligned}
\end{equation}
\end{tabular} &
\begin{tabular}[c]{#{}l#{}}
\begin{equation}
\tag{2}\label{t3:2}
\begin{aligned}
y(x) =20.33 + 1.24y - 1.74 \times 10^{-1}x^5 \\ + 1.14 \times 10^{-7}y^5
\end{aligned}
\end{equation}
\end{tabular} \\ \hline
\begin{tabular}[c]{#{}c#{}}BlaBla \\ Sth\end{tabular} &
\begin{equation}
\tag{3}\label{t3:3}
\begin{aligned}
w(x) =2.13 + 0.03x
\end{aligned}
\end{equation}
&
\begin{equation}
\tag{4} \label{t3:4}
\begin{aligned}
er(x) =4.85 + 33.56y
\end{aligned}
\end{equation}
\\ \hline
\begin{tabular}[c]{#{}c#{}}BlaBla\\ Sth\end{tabular} &
\begin{equation}
\tag{5}\label{t3:5}
\begin{aligned}
b(x) =12.2 + 5.20y
\end{aligned}
\end{equation}
&
\begin{equation}
\tag{6}\label{t3:6}
\begin{aligned}
a(x) =1.11 + 1.11x - 2.543 \times 10^{-2}x^2
\end{aligned}
\end{equation}
\hline
\end{tabular}}
\end{table}
And it outputs the following table:
I am struggling to find a way how to align the tags. As you can see next to each formula there is a tag (1), (3), etc. , and it is positioned right next to the equation. But, I would like all the tags to be aligned. I tried with \hspace{1cm} to try to move them to the left, hoping that I can position them to the end of the column and with it align them, but it did not work.
Does anyone have an idea how I could do it?

Answer 1

You would need to wrap "display" equations inside minipages. The tags would correctly be pushed to the right. However, equations get centred w.r.t. surrounding environment.
One way to achieve left alignment with right tags is to add equations in-line and then use \tag{} separately. However, the latter is not allowed outside equations. It can be sorted out by manually setting the #currentlabel for very next \label{} usage; I have made a macro for that--its optional star removes parentheses in case you don't want them.
A couple remarks. I added geometry to increase the page width for demonstration because this table gets quite wide. Sometimes, environments like equations cause issues with the standard vertical spacing and this needs a manual adjustment. There are other table-related packages that sort it out, e.g. tabularray but here I have used a strut: \xmathstrut{factor} from mathtools. Also, for multi lined texts, I'd suggest to use \makecell from makecell--a very convenient macro that allows line breaks. EDIT. the vertical spacing could also be sorted by increasing so-called "gape" inside makecells--I'll leave it for you.
Here's the example
\documentclass{article}
\usepackage[margin=2cm]{geometry}
\usepackage{array}
\usepackage{makecell}
\usepackage{mathtools}
\makeatletter
\NewDocumentCommand\refanchor{sm}{
% #1 star removes partheses
% #2 reference label
\IfBooleanF{#1}{(}#2\IfBooleanF{#1}{)}
\protected#edef\#currentlabel{#2}}
\makeatother
\begin{document}
References: eq.~\ref{t3:1} on page \pageref{t3:1}.
References with parentheses: eq.~\eqref{t3:3} on page \pageref{t3:3}.
\begin{table}[tbh]
\renewcommand{\arraystretch}{1.5}
\small
\centering
\caption{Example table.}\label{tab:model-testbed}
\begin{tabular}{|c|l#{}|l#{}|}
\hline
Comment
& \multicolumn{1}{c|}{Device1}
& \multicolumn{1}{c|}{Device2} \\
\hline
\makecell{BlaBla\\Sth}
&
\begin{minipage}{0.4\linewidth}
\(\xmathstrut{1.25}
\begin{aligned}
y(x) = 66.1 + 1.11x - 1.28 \times 10^{-8}x^2 \\
+15.08 \times 10^{-2}x^1
\end{aligned}\)%
\hfill
\refanchor{1}\label{t3:1}
\end{minipage}
&
\begin{minipage}{0.4\linewidth}
\(
\begin{aligned}
y(x) =20.33 + 1.24y - 1.74 \times 10^{-1}x^5\\
+1.14 \times 10^{-7}y^5
\end{aligned}\)
\hfill
\refanchor{2}\label{t3:2}
\end{minipage} \\
\hline
\makecell{BlaBla\\Sth}
&
\begin{minipage}{0.4\linewidth}
\(\xmathstrut{1.15} w(x) =2.13 + 0.03x \)%
\hfill
\refanchor{3}\label{t3:3}
\end{minipage}
&
\begin{minipage}{0.4\linewidth}
\(er(x) = 4.85 + 33.56y\)%
\hfill
\refanchor*{4}\label{t3:4}
\end{minipage}
\\ \hline
\end{tabular}
\end{table}
\end{document}