Plot Highly Condensed Dataset

So I have a sample dataset which I need to plot using Matlab. The columns look like this:

Obviously due to this data set the plot looks exceptionally condensed.

Now I am totally new to plotting and statistical data processing. What can be done to make the data plot more visually comparable/perusal-able (plotting at larger intervals?)?

Here's the code I wrote:

fid=fopen('me.dat', 'r');
s=textscan(fid,'%s %s %f %f', 'headerlines', 1);
fclose(fid);
a=s{1};
b=s{2};
c=s{3};
d=s{4};
plot(c,d)

Thanks.

[Debarati Banerjee]

You may find this functionality helpful.

Cheers,

Debarati