How to reverse gradient of colormap in Matlab?

I have the data below in Matlab:

However, when I plot it, yellow is given to the values close to 1 and dark blue to the values close to 0. How can I reverse the order of the colorbar, so that yellow is given to the values close to 0 and dark blue to the values close to 1?

Thanks!

x_fract=[0  0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5    11.5    12.5    13.5    14.5    15.5    16.5    17.5    18.5    19.5    20.5    21.5    22.5    23.5    24.5    25.5    26.5    27.5    28.5    29.5    30.5    31.5    32.5    33.5    34.5    35.5    36.5    37.5    38.5    39.5    40.5    41.5    42.5    43.5    44.5    45.5    46.5    47.5    48.5    49.5    50.5    51.5    52.5    53.5    54.5    55.5    56.5    57.5    58.5    59.5    60.5    61.5    62.5    63.5    64.5    65.5    66.5    67.5    68.5    69.5    70.5    71.5    72.5    73.5    74.5    75.5    76.5    77.5    78.5    79.5    80.5    81.5    82.5    83.5    84.5    85.5    86.5    87.5    88.5    89.5    90.5    91.5    92.5    93.5    94.5    95.5    96.5    97.5    98.5    99.5    100.5   101.5   102.5   103.5   104.5   105.5   106.5   107.5   108.5   109.5   110.5   111.5   112.5   113.5   114.5   115.5   116.5   117.5   118.5   119.5   120.5   121.5   122.5   123.5   124.5   125.5   126.5   127.5   128.5   129.5   130.5   131.5   132.5   133.5   134.5   135.5   136.5   137.5   138.5   139.5   140.5   141.5   142.5   143.5   144.5   145.5   146.5   147.5   148.5   149.5   150.5   151.5   152.5   153.5   154.5   155.5   156.5   157.5   158.5   159.5   160.5   161.5   162.5   163.5   164.5   165.5   166.5   167.5   168.5   169.5   170.5   171.5   172.5   173.5   174.5];
y_fract=1-((1 ./ (0.962+exp((x_fract-3.252)))));
xx=[x_fract;x_fract];
yy=[y_fract;y_fract];
zz=zeros(size(xx));
hs=surf(xx,yy,1-zz,yy,'EdgeColor','interp','LineWidth', 3); %// color binded to "y" values
colormap('parula')
colorbar
view(2) 

Answer 1

[KSSV]

x_fract=[0  0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5    11.5    12.5    13.5    14.5    15.5    16.5    17.5    18.5    19.5    20.5    21.5    22.5    23.5    24.5    25.5    26.5    27.5    28.5    29.5    30.5    31.5    32.5    33.5    34.5    35.5    36.5    37.5    38.5    39.5    40.5    41.5    42.5    43.5    44.5    45.5    46.5    47.5    48.5    49.5    50.5    51.5    52.5    53.5    54.5    55.5    56.5    57.5    58.5    59.5    60.5    61.5    62.5    63.5    64.5    65.5    66.5    67.5    68.5    69.5    70.5    71.5    72.5    73.5    74.5    75.5    76.5    77.5    78.5    79.5    80.5    81.5    82.5    83.5    84.5    85.5    86.5    87.5    88.5    89.5    90.5    91.5    92.5    93.5    94.5    95.5    96.5    97.5    98.5    99.5    100.5   101.5   102.5   103.5   104.5   105.5   106.5   107.5   108.5   109.5   110.5   111.5   112.5   113.5   114.5   115.5   116.5   117.5   118.5   119.5   120.5   121.5   122.5   123.5   124.5   125.5   126.5   127.5   128.5   129.5   130.5   131.5   132.5   133.5   134.5   135.5   136.5   137.5   138.5   139.5   140.5   141.5   142.5   143.5   144.5   145.5   146.5   147.5   148.5   149.5   150.5   151.5   152.5   153.5   154.5   155.5   156.5   157.5   158.5   159.5   160.5   161.5   162.5   163.5   164.5   165.5   166.5   167.5   168.5   169.5   170.5   171.5   172.5   173.5   174.5];
y_fract=1-((1 ./ (0.962+exp((x_fract-3.252)))));
xx=[x_fract;x_fract];
yy=[y_fract;y_fract];
zz=zeros(size(xx));
hs=surf(xx,yy,1-zz,yy,'EdgeColor','interp','LineWidth', 3); %// color binded to "y" values
cmap = flip(parula) ; 
colormap(cmap)
colorbar
view(2)