# LaTeX Tools¶

## Example¶

from econtools import read, outreg, table_statrow, write_notes
import econtools.metrics as mt

# Run Regressions
reg1 = mt.reg(df, 'ln_wage', ['ed'], addcons=True)
reg2 = mt.reg(df, 'ln_wage', ['age', 'age2'], addcons=True)

# Put coefficients and standard errors in a table
regs = (reg1, reg2)
table_string = outreg(regs,
['ed', 'age', 'age2', '_cons'],     # Add these coefficients to the table
['Years Education',                 # Use these label for the coeffs
'Age',
'Age$^2$',
'Constant']
digits=3                            # Round to 3 decimal digits.
)

# Add R^2 to the table
table_string += "\\\\ \n"                           # Empty line between betas and r2
table_string += table_statrow("R$^2$"               # Add a row with this label
[x.r2 for x in regs], # Fill the row with these values
digits=3)

# Save the table string to a file
results_path = 'my_results.tex'
with open(results_path) as f:
f.write(table_string)

# Save separate file with table notes
notes = "Sample size is {}.".format(reg1.N)
write_notes(notes, results_path)


The above snippet of code saves two files to disk, my_results.tex:

Years Education  & 3.142**    &             \\
& (1.413)    &             \\
Age              &            & 1.590       \\
&            & (2.020)     \\
Age$^2$          &            & 1.390       \\
&            & (4.024)     \\
Constant         & 11.132***  & 10.324***   \\
& (1.324)    & (2.720)     \\
\\
R$^2$            & 0.129      & 0.132       \\


and my_results_notes.tex:

Sample size is 934.


These files can be incorporated into a LaTeX document using the \input command. In the main LaTeX document:

\documentclass{article}

\usepackage{threeparttable}
\usepackage{booktabs}

\begin{document}

\begin{table}
\centering
\caption{Two Wage Regressions}\label{tab:wage-reg}
\begin{threeparttable}
\begin{tabular}{lcc}
\toprule
& (1) & (2) \\
\midrule
\input{my_results}  % The table fragment
\bottomrule
\end{tabular}
\begin{tablenotes}
\item \emph{Notes:}
\input{my_results_notes}  % The note on sample size.
\end{tablenotes}
\end{threeparttable}
\end{table}

\end{document}


This results in