begin{tikzpicture}
begin{axis}[width=3cm,
height=6cm,
footnotesize,
xmin=1,
xmax=15,
xlabel={X},
xmajorgrids,
ymin=0.2,
ymax=1.2,
ylabel={Y},
ymajorgrids,
axis background/.style={fill=white},
legend style={legend cell align=left,at={(axis cs:0.,0.2)},anchor=south}
]
addplot [color=mycolor1c,dashed,mark size=5pt,mark=x,mark options={solid}]
table[row sep=crcr, y expr=thisrow{Y}*.5]{%
    X    Y\
    1   1.98396947369363\
    2   1.86736194644617\
    3   1.39672685380491\
    4   1.81801351792524\
    5   1.65800541448776\
    6   1.72124859501669\
    7   1.95053632111296\
    8   1.5953158074501\
    9   2.20484922246232\
    10  2.06660239159798\
    11  1.15700938093597\
    12  1.70354273363983\
    13  1.97071496027903\
    14  1.5377824362414\
    15  1.34852389652374\
};
addlegendentry{1};

addplot [color=mycolor3c,solid,mark size=3.0pt,mark=o,mark options={solid}]
table[row sep=crcr, y expr=thisrow{Y}*.5]{%
    X    Y\
    1   1.98396947369363\
    2   1.87985797050402\
    3   1.81018984587384\
    4   1.45668153706335\
    5   1.45662344223124\
    6   1.42321790298663\
    7   1.58846550051792\
    8   1.7261014576169\
    9   1.84497235618249\
    10  1.83868784206141\
    11  1.91262415124094\
    12  1.87950764557444\
    13  1.16064983693758\
    14  1.28630813303169\
    15  0.729867599135851\
};
addlegendentry{2};

addplot [color=mycolor2c,solid,mark size=3.0pt,mark=*,mark options={solid}]
table[row sep=crcr, y expr=thisrow{Y}*.5]{%
    X    Y\
    1   1.98396947369363\
    2   1.58099605261815\
    3   1.25697492063651\
    4   1.46582314712387\
    5   1.3939586089965\
    6   1.32595119844705\
    7   1.41440624648194\
    8   1.53386555109464\
    9   1.7654715541107\
    10  1.54694708739791\
    11  1.53904078916298\
    12  1.66515096650716\
    13  1.09210648149942\
    14  1.2047294527546\
    15  0.647646671362433\
};
addlegendentry{3};
end{axis}
end{tikzpicture}%