MATLAB: How to take value from function and put it into disp script

#disp #placeholderMATLAB

My task is to "display the words: 'The ball hits the ground at a distance of X meters', where X is the hitDistance from the function throwBallFunc." (I have written the throwBallFunc).

So far, I have disp( ' The ball hits the ground at a distance of %d meters '); which is not working. How do I write it so that I can get the value of X aka hitDistance from the function throwBallFunc that I created? Thank you!

Best Answer

Use:

sprintf( ' The ball hits the ground at a distance of %d meters ',X)

or:

fprintf( ' The ball hits the ground at a distance of %d meters ', X)

instead, depending on what you want to do.

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Simply write this:

function distance = throwBall(v,theta)
h=1.5; 
a=9.8;
t=0:0.001:1;
x=v*cos(theta).*t;
y=h+v*sin(theta).*t-0.5*a*t.^2;
ypos=find(y < 0, 1);
distance=x(:,ypos);
g=zeros(1,length(x));
fprintf('The ball hit the ground at %0.4f meters. \n', distance);
figure
hold on
plot(x,y)
plot(x,g,'--', 'color', 'black')
xlabel('Distance (m)')
ylabel('Height (m)')
title('Ball trajectory')
end

and call it from command line as

 distance=throwBall(4,pi/4)

and observe the results.

Best Answer

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