How to get a script to only give me the number of elements less than 2?

I have a script in which y equals 100 various numbers. I was able to sort the numbers in order from least to greatest, but I need the script to give me the amount of numbers that are less than 2. How would I go about doing this?

Answer 1

[David Hill]

nnz(y<2);

[Kyle Donk]

Each time I run this, I get a different answer.

[David Hill]

I obviously don't understand, but if you have an array, y:

y=randi(10,1,100);
nnz(y<2)%gives you all values of y < 2 (this will not change unless y changes.

[Kyle Donk]

But it would make sense for y to change each time I run the script, right? Because if y is a set of 100 random numbers, those numbers would change each time.

[David Hill]

But each time you run the script,

z=nnz(y<2);

will provide you the number of values of y <2

Answer 2

[Meg Noah]

Here are random numbers as an example. It plots all the values in blue, finds indices for values less than 2, and plots those values in red.

x = 1:100;
y = 20*rand(100,1)-10;
ind = find(y < 2);
figure()
plot(x,y,'.b');
hold on
plot(x(ind),y(ind),'.r');

[Kyle Donk]

This is good, but I need the script to only display how many numbers are less than two. I am not allowed to count the numbers manually.

So if there are five numbers less than two, I need the script to give me "5".

[Meg Noah]

to display on the console, just use num2str or fprintf

num2str(numel(ind))
fprintf(1,'There are %d values less than 2\n',numel(ind))