How store values in a column array?

 At first this is my work:

addpath('file');

im = importdata('Results0.txt');

data = getfield(im, 'data'); %#ok<GFLD>

[areamax] = max(data);

areamax = areamax (2:4);

r = areamax (2)/areamax (3);

vol = (((areamax (1))^(3/2))*pi)/(((r)^(1/2))*4);

My import data is different files.txt with the name Results# from where the volume of the data is calculate. I change the name of the file every time, but I need to store all the volume in a column array to later make a plot. I don't known how save the volume before change the file, for example Results1 to Result2. Thank you for your time.

Answer 1

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

If you initialize

vol = [];

then you can append each new result to the column by using

vol = [vol;  (((areamax (1))^(3/2))*pi)/(((r)^(1/2))*4) ];