Positioning text at node

Question

This should be a simple question about positioning text with nodes using pgfplots.

To make a skew node line with text I'd use

\documentclass{article}

\usepackage{pgfplots}
\pgfplotsset{compat = newest}

\begin{document}

\begin{figure}
\begin{tikzpicture}
\begin{axis}[
    title = DPPH,
    xlabel = Applied Magnetic Field (I Guess) / G,
    xmax = 8,
    xmin = -8,
    ymax = 300,
    ymin = -300,
    ytick = \empty,
    xtick pos = left]

    \addplot[black, % Plotting the data
    no marks]
    table[x=xaxis,y=yaxis] {dpph2.dat};

    \node[coordinate,
    pin = {45:g factor = 1.96}
    ] at (0.2,224) {};

\end{axis}
\end{tikzpicture}
\end{figure}
\end{document}

for example.

To make a skew node with rotated text, where I can position the text about the node line using above, below, left, right or a combination of those, I'd change the \node part above to

\node[coordinate,
    pin = {[rotate=45]right:g factor = 1.96}
    ] at (-0.3,250) {};

My question: how do I use above, below, right, etc in the first code (without rotating the text as well as the node line)? I tried things like 45right, 45, right, [45]right, but none of my guesses worked and I can't seem to find an example online.

EDIT

Here's what the first bit of code I put above gives me

and here's what I'd like to be able to do (just move where the text is with respect to the node line)

Thanks.

Answer 1

(Ab)using the code from Jake's answer to How can I force TikZ pin angle?, we can define a new style for the pins that uses a label whose anchor we set to label the text, and an empty pin to draw the line. You supply the arguments like [anchor for label]angle:text to make it similar to the default pin usage. Presumably, there is some way to automatically choose the anchor based on the angle, but my TikZ-fu is not strong enough for that :-) Note that the % at the end of the lines are necessary because of how TikZ interprets spaces.

\documentclass{standalone}

\usepackage{pgfplots}
\pgfplotsset{compat = newest}
\tikzset{
    aligned pin/.style args={[#1]#2:#3}{
        pin={[%
            inner sep=0pt,%
            label={[%
                append after command={%
                    node[%
                        inner sep=0pt,%
                        at=(\tikzlastnode.#2),%
                        anchor=#1,%
                    ]{#3}%
                }%
            ]center:{}}%
        ]#2:{}}%
    }
}
\begin{document}

\begin{tikzpicture}
\begin{axis}[
    title = DPPH,
    xlabel = Applied Magnetic Field (I Guess) / G,
    xmax = 8,
    xmin = -8,
    ymax = 300,
    ymin = -300,
    ytick = \empty,
    xtick pos = left
    ]

    \node[coordinate,
    aligned pin={[west]45:g factor=1.96},
    ] at (0,0) {};

\end{axis}
\end{tikzpicture}
\end{document}