How to select specific data rows from neighboring column

Hello,

I have a quick question,

I have this code to pull out data from my excel file and plot scatter from this extracted table:

My question is what do I do if I want a command to select only specific rows based on the numbers in column 1 (for example, I only wanted to plot numbers 21-30 and nothing else?

Thanks!

Answer 1

[Fangjun Jiang]

index=and(T(:,1)>=21, T(:,1)<=30);
x=T(index,4);
y=T(index,3);
z=T(index,2);

[Andrew]

amazing, thanks!