# Re-creating a scatter plot(s), changing background colours and layout

I am trying to create something similar to this plot:

I have managed to create the first 3 scatter plots and now I would like to try and replicate the image.

1. Add horizontal and vertical lines
2. colour backgrounds

Any help would be great

Tex document:

\documentclass[]{article}
\usepackage{tikz}
\usepackage{pgfplots}

\begin{document}

%%%%%%%%%%%%%%% basic scatter plot %%%%%%%%%%%%%%%%

% plot 1: base plot
\begin{tikzpicture}
\pgfplotsset{
scale only axis,
}
\begin{axis}[
xlabel=$A$,
ylabel=$B$,
]
\addplot[only marks, mark=+, mark size=6pt, ultra thick, color = blue]
coordinates{ % + data
(0.05,0.50)
(0.10,0.15)
(0.30,0.85)
(0.45, 0.95)
(0.60, 0.75)
}; %\label{plot_one}
\addplot[only marks, mark=-, mark size=6pt, ultra thick, color = red]
coordinates{ % + data
(0.20,0.05)
(0.25,0.60)
(0.55,0.40)
(0.90, 0.85)
(0.90, 0.15)
};
% plot 1 legend entry
\end{axis}
\end{tikzpicture}

\begin{tikzpicture}
\pgfplotsset{
scale only axis,
}
\begin{axis}[
xlabel=$A$,
ylabel=$B$,
]
\addplot[only marks, mark=+, mark size=4pt, ultra thick, color = blue]
coordinates{ % + data
(0.05,0.50)
(0.10,0.15)
};
\addplot[only marks, mark=+, mark size=8pt, ultra thick, color = blue]
coordinates{ % + data
(0.30,0.85)
(0.45, 0.95)
(0.60, 0.75)
}; %\label{plot_one}
\addplot[only marks, mark=-, mark size=4pt, ultra thick, color = red]
coordinates{ % + data
(0.20,0.05)
(0.25,0.60)
(0.55,0.40)
(0.90, 0.85)
(0.90, 0.15)
};
% plot 1 legend entry
\end{axis}
\end{tikzpicture}

\begin{tikzpicture}
\pgfplotsset{
scale only axis,
}
\begin{axis}[
xlabel=$A$,
ylabel=$B$,
]
\addplot[only marks, mark=+, mark size=4pt, ultra thick, color = blue]
coordinates{ % + data
(0.05,0.50)              % Add circle around here
(0.10,0.15)              % Add circle around here
};
\addplot[only marks, mark=+, mark size=6pt, ultra thick, color = blue]
coordinates{ % + data
(0.30,0.85)
(0.45, 0.95)
(0.60, 0.75)
}; %\label{plot_one}
\addplot[only marks, mark=-, mark size=8pt, ultra thick, color = red]
coordinates{ % - data
(0.20,0.05)
(0.25,0.60)
(0.55,0.40)
};
\addplot[only marks, mark=-, mark size=2pt, ultra thick, color = red]
coordinates{ % - data
(0.90, 0.85)             % Add circle around here
(0.90, 0.15)
};
% plot 1 legend entry
\end{axis}
\end{tikzpicture}

\end{document}


1. You can add lines within the axis environment using:

\draw (axis cs:x1,y1)--(axis cs:x2,y2);

With (x1,y1) and (x2,y2) the coordinates of your lines.

1. In the axis environment, you can fill the area between paths. Start by creating paths:

\path[name path = name_of_your_path] (axis cs:x1,y1) -- (axis cs:x2,y2);

Then fill the area between two paths:

\addplot [your_color] fill between[of = name_of_your_path_1 and name_of_your_path_2, soft clip = {domain=x1:x2}];

Here, the two paths are defining the boundaries of the area on the y axis and the soft clip is defining the boundaries on the x axis.

1. For the points you are trying to circle, simply use a different marker by loading in the preamble:

\usetikzlibrary{plotmarks}

Then select the appropriate marker. In your case use mark=oplus instead ofmark=+. A complete list of markers can be found in the Manual for Packagepgfplots, section "Markers, Linestyles, (Background-) Colors and Colormaps" (page 120 for the version 1.5.1 DEV).