How to do get my code to display an answer using f print f. I want to display the result using fprint f

This is my Code

close all
t_sec=[0 30 60 150 240];
Temp_C=[800 457 269 79 46];
time=0:1:250;
pa=polyfit(t_sec,Temp_C,4);
Pa=polyval(pa,time);
pb=spline(t_sec,Temp_C,time);
pc=pchip(t_sec,Temp_C,time);
plot(t_sec,Temp_C,'b*',time,Pa,'r-',time,pb,'g-',time,pc,'m-')
xlabel('Time(sec)')
ylabel('Temp(C)')
legend('Data','Polynomial interpolation','not-a-knot','shape-preserving')

t_3min=180;
T_3min=pchip(t,T,t_3min)

Unrecognized function or variable 't'.

[Walter Roberson]

What value do you want output?

[James Water Bird]

62.113

Answer 1

[Star Strider]

Perhaps this —

t_sec=[0 30 60 150 240];
Temp_C=[800 457 269 79 46];
time=0:1:250;
pa=polyfit(t_sec,Temp_C,4);
Pa=polyval(pa,time);
pb=spline(t_sec,Temp_C,time);
pc=pchip(t_sec,Temp_C,time);
plot(t_sec,Temp_C,'b*',time,Pa,'r-',time,pb,'g-',time,pc,'m-')
xlabel('Time(sec)')
ylabel('Temp(C)')
legend('Data','Polynomial interpolation','not-a-knot','shape-preserving')

t_3min=180;
T_3min=pchip(t_sec,Temp_C,t_3min);                              % Guessing That This Is What Is Actually Wanted
fprintf('\nThe temperature at %3d seconds is %.3f °C\n',t_3min,T_3min)

The temperature at 180 seconds is 62.114 °C

See the documentation for fprintf for details.

.

[James Water Bird]

THANKS

[Star Strider]

As always, my pleasure!