Problem trying to graph, getting error unbalanced

This is my code. It was created by my professor and it is supposed to lead to a logarithmic graph of the class data listed, but i keep getting an 'unbalanced or unexpected parenthesis or bracket' error in line 37. Can someone please help me?

    Class_YMod _Sample3 = [250000
    0.176
    7.5535
    2
    10.9
    5.26
    10.9
    10.9
    3.1
    3
    0.78
    9
    17.7066
    17.7066
    25.5
    13
    95
    532.2889
    1869
    85703.54
    85703.54
    85703.54
    85703.54
    154.809
    189450
    176737
    176737
    164030
    164030
    157670
    185583
    124.617
    301300
    250
    75353
    75353
    6969100]';

    %===
    % Added plotting from Willis.
    %===
    Class_YMod _Sample3 = sort(Class_YMod _Sample3);
    figure
    handle_a = semilogy(1:length(Class_YMod _Sample3), Class_YMod _Sample3,'ko')
    set(handle_a, 'markersize',6,'markerfacecolor','y')

Answer 1

[per isakson]

Works here after I replaced

    Class_YMod _Sample3

by

    Class_YMod_Sample3