Index exceeds the number of array elements (35).

x=0:6

Ta=30.2

To=69.0

k=0.04

e=1.04

y=Ta+(To-Ta)*e.^(x*(-k))

y2=log(y-Ta)

subplot(1,2,1)

plot(x,y)

xlabel=('estimated time--->')

ylabel=('tempertureT--->')

title=('temperature vs estimated time graph')

subplot(1,2,2)

plot(x,y2)

xlabel=('time--->')

ylabel=('log(T-Ta)--->')

title('log(T-Ta) vs time graph')

Answer 1

[Stephen23]

You have repeatedly used syntax with an = sign, which assigns those values to some variables, e.g:

xlabel=('estimated time--->')
ylabel=('tempertureT--->')
title=('temperature vs estimated time graph')

Whereas I suspect that you really wanted to just call those functions (note: no = sign):

xlabel('estimated time--->')
ylabel('tempertureT--->')
title('temperature vs estimated time graph')

Once you have assigned a variable named title (or xlabel or ylabel or ...) then you will not be able to call the title (or xlabel or ylabel or ...) function.

Solution: call those functions properly, clear your workspace, and try again.

[Stephen23]

Jeel Khatiwala's "Answer" moved here:

x=0:6
Ta=30.2
To=69.0
k=0.04
e=1.04
y=Ta+(To-Ta)*e.^(x*(-k))
y2=log(y-Ta)
subplot(1,2,1)
plot(x,y)
xlabel=('estimated time--->')
ylabel=('tempertureT--->')
A=('temperature vs estimated time graph')
subplot(1,2,2)
plot(x,y2)
xlabel=('time--->')
ylabel=('log(T-Ta)--->')
title('log(T-Ta) vs time graph')

[Stephen23]

@Jeel Khatiwala: you fixed the title functions, but not the xlabel and ylabel functions.