Label points in tikz within a loop

I have a set of points to be shown on a 2-dimensional plot and have written a part of code for.

1. First, How can I label the points (from 1 to 20 for example) within a loop and represent them by bullet.

2. Second, any of these points has a magnitude and the size of its bullet should be proportional to the magnitude. Imagine that these points are some location coordinates and the magnitude value represents the severity of a disaster happened there. How can I figure it out?

I appreciate any help in advance

\begin{figure}[H]
\centering
\newcounter{ga}
\setcounter{ga}{1}
\begin{tikzpicture}[x=2cm,y=2cm]
\draw[latex-latex, thin, draw=gray] (0,0)--(10,0) node [right] {$x$};
\draw[latex-latex, thin, draw=gray] (0,0)--(0,10) node [above] {$y$};

\foreach \Point in {
(1,2),
(2,1),
(3,4),
(2.4,3.2),
(3.1,4,1),
(5,6),
(7,9)}
{
\node at \Point {\textbullet};
}
\end{tikzpicture}
\end{figure}

• Dec 21, 2017 at 11:36
• \node[fill, circle, inner sep=2pt] at \Point {}; Dec 21, 2017 at 11:45
• Thanks for your sugegstion percusse. But this does not label the points Dec 21, 2017 at 12:18
• Addition: to label a point in pgfplots, look at nodes near coords, try for example adding nodes near coords*={\coordindex} to the \addplot options. Dec 21, 2017 at 12:41

like this?

above solution not consider dependance of dots size from magnitude because it is not known, which distance is meaning for magnitude (from origin? from x-axes?)

\documentclass[tikz, margin=3mm]{standalone}

\begin{document}
\begin{tikzpicture}[%x=2cm,y=2cm
dot/.style = {circle, fill,
minimum size=3pt,% here should be value dependend on magnitude,
% which so far is not defined, so temporary sie is fixed
}
]
\draw[-latex, thin, draw=gray] (0,0)--(10,0) node [right] {$x$};
\draw[-latex, thin, draw=gray] (0,0)--(0,10) node [above] {$y$};
%
\foreach \Point [count=\i] in {
(1,2),
(2,1),
(3,4),
(2.4,3.2),
(3.1,4,1),
(5,6),
(7,9)}
{
\node[dot,label=\i] at \Point {};
}
\end{tikzpicture}
\end{document}