How to import data from a .txt file that contains text and numbers

I have a text file called D01.txt which contains the following:

%Initial Void ratio =	0.68
%Axial strain (%)	Volumetric Strain (%)	Sigma1' (kPa)	Sigma3' (kPa)
0.013	0	155.32	140
0.033	0.015	171.55	140

I am able to import the contents of the four coloumns in MATLAB using:

D02 = load('D02.txt')

But I do not know how to automatically grab the value 0.68 at the end of the first line of the D01.txt file.

Thank you!

[Katie]

Hi, you can use textscan to pull out different data types from a text file.

There are some examples in the Matlab documentation that do what you're looking to do: https://www.mathworks.com/help/matlab/ref/textscan.html

Answer 1

[Ryan Moore]

I did it with textscan but it's surprisingly complicated...

function [Eo] = EoGet(textfile)
C = importdata(textfile,' ',1)
chr = C{1}
Eo = cell2mat(textscan(chr,'%%Initial Void ratio =	%f',1))
end

Answer 2

[Stijn Haenen]

Hi,

You can try this:

text=('nitial Void ratio = 0.68');

a=find(text=='=');

number=text(a+1:end);

num=str2num(number)