I am trying to define a command that prints a plot and a given calculated parameter of a plot each time that command is called. When this command is run more than once the parameter in question keeps only the last value assigned to it. See below for functioning example:
\documentclass[11pt,letterpaper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{pgfplots}
\usepgflibrary{fpu}
\usepackage[margin=0.5in]{geometry}
\pgfplotsset{compat=1.5}
\newcommand{\UoneCurveInst}[2]{
\pgfkeys{/pgf/fpu}
\pgfkeys{/pgf/fpu/output format=fixed}
\pgfmathsetmacro{\LT}{#2/#1}
\pgfkeys{/pgf/fpu=false}
\addplot[no markers,forget plot]coordinates{(#2,70) (#2,100)} node[above,xshift=-.1cm,yshift=-.75cm,pos=0,rotate=45] {\color{black}#2A:\LT};
}
\begin{document}
\begin{tikzpicture}
\begin{loglogaxis}[title= TCC Curve,xlabel= {Current (A)},grid=both,
ylabel= {Time (seconds)},log ticks with fixed point,xmin=100,xmax=100000,ymin=0.01,ymax=100,
xticklabel style={rotate=90, anchor=east, /pgf/number format/fixed,/pgf/number format/precision = 0},
xtick={100,1000,10000,100000},height=9in, width=7in]
\UoneCurveInst{120}{800}
\UoneCurveInst{120}{600}
\end{loglogaxis}
\end{tikzpicture}
\end{document}
I only recently started using this kind of macro so I feel I am missing something about their fundamental function.
Edit: the specific problem I am having is that both of the instances of the use of \LT output the same value but they should be different. The value of \LT is used for both plots is whatever the last calculated value is.
