how to output data into a text file

Hello everyone,

I am having an issue with how to export data to a text file.

I have been looking at https://www.mathworks.com/help/matlab/import_export/writing-to-text-data-files-with-low-level-io.html for help but not getting anwere.

below is my code that I have and would like to export it to 3 different text files.

clc
clear
% Given basin parameters 
g = 9.81; % gravity
h = 15; % water depth
l = 500; % basin length 
n = 1; % node 

% Function to get wave length 

L1 = 2*l/n; 
disp('At node = 1');
disp(['Wavelength L = ' num2str(L1)]);
% Function to get wave period 

T1 = (2*l)/(n*sqrt(g*h));
disp(['Wave Period at T = ' num2str(T1)]);
 
% Given basin parameters 
g = 9.81; % gravity 
h = 15; % water depth
l = 500; % basin length 
a = 2; % node 

L2 = 2*l/a; 
disp('At node = 2');
disp(['Wavelength L = ' num2str(L2)]);
% Function to get wave period 

T2 = (2*l)/(a*sqrt(g*h));
disp(['Wave Period at T = ' num2str(T2)]);


% Given basin parameters 
g = 9.81; % gravity 
h = 15; % water depth
l = 500; % basin length 
b = 3; % node 

L3 = 2*l/b; 
disp('At node = 3');
disp(['Wavelength L = ' num2str(L3)]);
% Function to get wave period 

T3 = (2*l)/(b*sqrt(g*h));
disp(['Wave Period at T = ' num2str(T3)]);

%information needed for free surface profile

t=0;
H = 1; % wave height 
x = 0:l;

k1 = 2*pi/L1;

k2 = 2*pi/L2;

k3 = 2*pi/L3;

sigma1 = 2*pi/T1;

sigma2 = 2*pi/T2;

sigma3 = 2*pi/T3;

N1 = H/2*cos(k1*x)*cos(sigma1*t);

N2 = H/2*cos(k1*x)*cos(sigma2*t);

N3 = H/2*cos(k1*x)*cos(sigma3*t);

subplot(3,1,1);

N1 = H/2*cos(k1*x)*cos(sigma1*t);

plot(x,N1, 'r')
hold on 
yline(0);
ylim([-1 1])

title ('mode n = 1, L = l/2')
xlabel ('x(m)')
ylabel ('eta (m)')
legend('H/2*cos(k1*x)*cos(sigma2*t)')

subplot(3,1,2)

N2 = H/2*cos(k2*x)*cos(sigma2*t);
plot (x,N2,'r');
hold on 
yline(0);
ylim([-1 1])
title ('mode n = 2, L = l')
xlabel ('x(m)')
ylabel ('eta (m)')
legend('H/2*cos(k2*x)*cos(sigma2*t)')

subplot(3,1,3)

N3 = H/2*cos(k3*x)*cos(sigma3*t);
plot(x, N3, 'r')
hold on 
yline(0);
ylim([-1 1])

title ('mode n = 3, L= 2l/3')
xlabel ('x(m)')
ylabel ('eta (m)')
legend('H/2*cos(k3*x)*cos(sigma2*t)')

Thank you for your help

Answer 1

[Jalaj Gambhir]

Hi,

As it is not very obvious what exactly you would like to write in your text file, I am assuming you want to write the statements you have used inside disp function in the text file.

To do so, you can use fprintf, you can find a helpful solution here.

Hope this helps.