how can i plot all for loop's values

i made a for loop programe ,but when i make plot for value .. the result is point .. how can i save all value of for loop and plot them ??

clear,clc
for th=-25:.1:50;
  fai=atand(((750+450.*sin(th)))./(450.*cosd(th)));
  force=(4000*cosd(th)*1500)/(450*sind(fai));
  l=450*cosd(th)/cosd(fai);
  plot(th,force)
end

Answer 1

[mohammad Al-Kayyali]

hi mo ,

Try to use dummy variable to save your data then use the plot function as follows :

z=1;for th=-25:.1:50;
  fai=atand(((750+450.*sin(th)))./(450.*cosd(th)));
  force=(4000*cosd(th)*1500)/(450*sind(fai));
  thdummy(z)=th;
  forcedummy(z)=force;
z=z+1;
l=450*cosd(th)/cosd(fai);
end
plot(thdummy,forcedummy)

Answer 2

[Matt Tearle]

Why are you using a for-loop at all? These are all vectorized operations.

th=-25:.1:50; 
fai=atand(((750+450.*sind(th)))./(450.*cosd(th))); 
force=(4000*cosd(th)*1500)./(450*sind(fai)); 
l=450*cosd(th)./cosd(fai); 
plot(th,force)

Note the use of the elementwise multiply and divide everywhere.

[mohamed saber]

???? SORRY ...i can't understand ??

[Sean de Wolski]

Matt vectorized your statements so you don't need a for-loop.

[Matt Tearle]

Run the code I posted, then check your workspace. The first line creates a vector of values for th. Then fai, force, and l are also vectors, because all operations are performed element-by-element. No loops required. That's MATLAB for you.