How to draw 2 curves in the same tikzpicture having 2 columns information for each curve

Question

I am aiming to establish a tikzpicture that have two curves, the first curve have the following X and Y values and the second curve have the following X and Y values all the values for both the X and Y axes range from 0 to 1. Now I found this example as a starting point but not sure how to modify it since it assume that the X values is the same for both curves and only Y axis differs. Is there a way to achieve my needs?

    \documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{pgfplots}
\pgfplotsset{width=10cm,compat=1.14}
%enter the data sets as follows.

\begin{filecontents}{thu3.dat}
X Splits    Part1  Part2
1 Split-1     24    36
2 Split-2       24  34
3 Split-3       22  29
4 Split-4       25  31
5 Split-5   1   1
\end{filecontents}

\begin{document}

\begin{figure}[h!]


\begin{tikzpicture}
\begin{axis}[
axis lines=middle,
ymin=0,
x label style={at={(current axis.right of origin)},anchor=north, below=10mm},
title={\textbf{\textit{Accuracy}}},
    xlabel=Time,
  ylabel=No. of Channels,
  xticklabel style = {rotate=30,anchor=east},
   enlargelimits = false,
  xticklabels from table={thu3.dat}{Splits},xtick=data]
\addplot[orange,thick,mark=square*] table [y=Part1,x=X]{thu3.dat};
\addlegendentry{Part I}
\addplot[green,thick,mark=square*] table [y= Part2,x=X]{thu3.dat};
\addlegendentry{Part II}
\end{axis}
\end{tikzpicture}
\caption{Comparison between part 1 and part 2 on Thursday}
\end{figure}
\end{document}

Thanks

Answer 1

There are a couple of things to change:

From the axis options you want to remove these three things:

xticklabel style = {rotate=30,anchor=east},
xticklabels from table={thu3.dat}{Splits},
xtick=data

The first one is somewhat pointless here I think, as you only have numbers. The ticklabels aren't so long that rotating is needed. You don't want to read in the ticklabels from some file I think, I'm guessing you just want the numerical value. And the last one will place a tick at every single data point in the first \addplot, which is altogether too much.

For the \addplots themselves, you want

\addplot[orange,thick,mark=square*] table[col sep=comma] {Curve_one.csv};
\addplot[green,thick,mark=square*] table[col sep=comma] {Curve_two.csv};

possibly with other colours/markers, but that is for you to decide. The colour is set by orange/green, so to use a different colour just replace these by whatever colour you need. To get a thinner line you can just remove thick. (Or replace by thin, but I believe that is the default.) If you want to change the size of the markers (the squares), use mark size=1pt, where you modify 1pt to whatever you want.

Here I used the two datafiles you posted links to. pgfplots by default assumes that columns in datafiles are separated by whitespace, so col sep=comma is needed here. I haven't explicitly specified which column is x and which is y, because pgfplots will, unless told otherwise, use the first column for the x-values and the second for the y-values. And that is how those .csv files are structured.

To get the labels centered on the axes, the simplest solution is perhaps to change axis lines=middle to axis lines=left. That will also change another thing, giving you ticklabels for zero, on x- and y-axis. But you have in your code already a method for moving the axis labels, in your original code. So an alternative method would be this:

axis lines=middle,
x label style={at={(0.5,0)},below=2.5ex},
y label style={at={(0,0.5)},rotate=90,above=5ex},

\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots}
\pgfplotsset{width=10cm,compat=1.14}
\definecolor{RYB1}{RGB}{218,232,252}
\definecolor{RYB3}{RGB}{108,142,191}
\begin{document}

\begin{figure}
\centering
\begin{tikzpicture}
\begin{axis}[
  % either use the following three lines
%  axis lines=middle,
%  x label style={at={(0.5,0)},below=2.5ex},
%  y label style={at={(0,0.5)},rotate=90,above=5ex},
  % or use this one line
  axis lines=left,
  ymin=0,
  title={\textbf{\textit{Accuracy}}},
  xlabel=Time,
  ylabel=No. of Channels,
  enlargelimits = false,
  legend pos=south east
]
\addplot[RYB1, mark=square*] table[col sep=comma] {Curve_one.csv};
\addlegendentry{Part I}
\addplot[RYB3, mark=square*] table[col sep=comma] {Curve_two.csv};
\addlegendentry{Part II}
\end{axis}
\end{tikzpicture}
\caption{Comparison between part 1 and part 2 on Thursday}
\end{figure}
\end{document}