latex - 如何使用两个 y 轴标签打开此 pgf 绘图相邻条形图

Question

我有以下代码大致近似于我想用 tikz 制作的图表：

\begin{tikzpicture}
\begin{axis}[
% (normal text should not be set in math mode)
xlabel=,
ylabel=,
% if you use `data' ticks will be set on every x coordinate that is
% given by the *first* `\addplot' command
xtick=data,
xticklabels={
    Control,
    Voucher,
    Transfer%
},
ytick=data,
yticklabels={
    No increase,
    Increase%
},
% use the following key so the baseline of all ticklabel entries is the same
% (compare this image to the one from marmot)
typeset ticklabels with strut,
% there is one default value for the `legend pos' that is outside the axis
legend pos=outer north east,
% (so the legend looks a bit better)
legend cell align=left,
% (moved this common key here),
]
% (renamed `plot coordinates' by `coordinates'
\addplot [mark=*,blue] coordinates {
    (1,1)
    (2,1)
    (3,1)
};

\addplot [color=red,mark=x] coordinates {
    (1,1)
    (2,1)
    (3,2)
};

\addplot [color=green,mark=x] coordinates {
    (1,1)
    (2,2)
    (3,2)
};

% (replaced `\addlegendentry's with `\legend')
\legend{
    Pure Altruism,
    Warm Glow,
    Mental Accounting,
}
\end{axis}
\end{tikzpicture}

如您所见，我尝试添加 y 轴刻度标签，但这并没有出现在实际图表本身中。此外，我试图说明的本质上是离散的，因此我希望 x 轴上的每个刻度有三个相邻的条形图，这将说明在每个理论下水平应该是“高”还是“低”传奇。

如何将其转换为具有三个相邻条形的条形图并添加我需要的两个 y 轴标签？

Answer 1

As per this answer, when you use ytick=data, the labels are extracted from the first \addplot command used. Your first \addplot command only contains 1 as y tick label.

You can either explicitly define the labels:

ytick={1, 2},

or change the order of your \addplot commands to have a more representative one first (one with both all x tick labels and all y tick labels).