You can obtain something similar using pcolor(). For Example
[x, y] = meshgrid(1:128, 0:70);
z = sort(rand(size(x)));
p = pcolor(x,y,z);
p.EdgeAlpha = 0;
I am using random data points therefore it does not look the same as your image. Note that to display white color on the plot, the corresponding element in z variable must be inf.