>> load dataset1;
>> d = dataset1;
>> plot(d(:,1),d(:,2))
>> plot(d(:,1),d(:,2),'.')
>> d = dataset2;
??? Undefined function or variable dataset2.

>> load dataset2;
>> d = dataset2;
>> plot(d(:,1),d(:,2),'.')
>> load dataset3;
>> d = dataset3;
>> plot(d(:,1),d(:,2),'.')
>> quit

 824 flops.