I created a table, which has four columns and fifteen rows. However, somewhat point, the angle column: 0,10,20,30,40,.... 120 is not displayed.
documentclass[%
preprint,
doublecolumn
%superscriptaddress,
%groupedaddress,
%unsortedaddress,
%runinaddress,
%frontmatterverbose,
%preprint
%preprintnumbers,
%nofootinbib,
%nobibnotes,
%bibnotes,
amsmath,amssymb,
aps,
%pra,
prc,
%rmp,
%prstab,
%prstper,
%floatfix,
]{revtex4-2}
\usepackage{anyfontsize}
\usepackage{float}
\usepackage{mathtools, nccmath}
\usepackage{graphicx}% Include figure files
\usepackage{tabularx}
\usepackage{dcolumn}% Align table columns on decimal point
\usepackage{bm}% bold math
%\usepackage{hyperref}% add hypertext capabilities
\usepackage[mathlines]{lineno}% Enable numbering of text and display math
\usepackage{amsmath}
\linenumbers\relax % Commence numbering lines
%\usepackage{latexsym}
%\usepackage[showframe,%Uncomment any one of the following lines to test
%%scale=0.7, marginratio={1:1, 2:3}, ignoreall,% default settings
%%text={7in,10in},centering,
%%margin=1.5in,
%%total={6.5in,8.75in}, top=1.2in, left=0.9in, includefoot,
%%height=10in,a5paper,hmargin={3cm,0.8in},
%]{geometry}
\begin{document}
\begin{table}
\caption{This table contains Cobalt's count rate:$R(\theta)$, count rate without background:$Y(\theta)$, and normalized count rate:$\frac{Y(\theta)}{Y(0)}$ their uncertainties. To obtain $R(\theta)$, divide "C" from Table.~\ref{Co_Count} by measured time, and its corresponding uncertainty:$\sigma R(\theta)$ is $\sigma C$ over time. For $\Y(\theta)$, subtract background count rate from$R(\theta)$. Its corresponding uncertainty is calculated by using Eq.~(\ref{eq:two}). Normalized count rate is divide $Y(\theta)$ by Y(0). Its uncertainty is from Eq.~(\ref{eq:one})}
\begin{ruledtabular}
\begin{tabular}{lcrr}
\textrm{$\theta$}& \textrm{$R(\theta)\pm \sigma R(\theta)$ }& \textrm{$Y(\theta) \pm \sigma {Y(\theta)}$} & \textrm{$\frac{Y(\theta)}{Y(0)}$ $\pm \sigma$ $\frac{Y(\theta)}{Y(0)}$ }\\
\textrm{($^{\circ}$)}&\textrm{$\frac{Count}{second}$}&\texrm{$\frac{Count}{second}$}& \\
\colrule
0& 2.970$\pm$0.070 &2.967$\pm$0.070&1.000$\pm$0.033
10&2.774$\pm$0.068 & 2.771$\pm$0.068&0.934$\pm$0.032
20&2.800$\pm$0.068 & 2.797$\pm$0.068&0.943$\pm$0.032
30&2.526$\pm$0.065 & 2.523$\pm$0.065&0.850$\pm$0.030
40&2.401$\pm$0.063 & 2.398$\pm$0.063&0.808$\pm$0.029
50&2.399$\pm$0.063 & 2.396$\pm$0.063&0.808$\pm$0.029
60&2.066$\pm$0.059 & 2.063$\pm$0.059&0.695$\pm$0.026
70&2.174$\pm$0.060 & 2.171$\pm$0.060&0.732$\pm$0.027
80&2.161$\pm$0.060 & 2.157$\pm$0.060&0.727$\pm$0.027
90&2.091$\pm$0.059 & 2.088$\pm$0.059&0.704$\pm$0.026
100&2.187$\pm$0.060 & 2.184$\pm$0.060&0.736$\pm$0.027
110&2.272$\pm$0.062 & 2.269$\pm$0.062&0.765$\pm$0.033
120&2.181$\pm$0.060 & 2.177$\pm$0.060&0.734$\pm$0.027
\end{tabular}
\end{ruledtabular}
\end{table}
\end{document)
Thank you in advance. Can you also explain what lcrr mean?



\\at the end of the rows. – egreg Dec 06 '19 at 22:48\\at the end of the rows, the angle column is displayed correctly. Also, thelcrrin argument oftabularis there to declare four columns to the table, the first being left aligned, the second being right aligned, and the two others being centered. – Vincent Dec 06 '19 at 23:02\end{document)cannot possibly work. – Mico Dec 07 '19 at 00:14