code wont match dimensions

a=[00.00 22.3

00.06 22.4

00.11 22.4

00.16 22.5

00.21 22.4

00.26 22.4

00.31 22.3

00.36 22.2

00.41 22.2

00.46 22.1

00.51 22

00.56 21.9];

b=[00.00 3.8

00.05 3.8

00.10 3.8

00.15 3.7

00.20 3.6

00.25 3.6

00.31 3.5

00.36 3.5

00.41 3.4

00.45 3.4

00.50 3.3

00.55 3.3];

%matrix a of indoor temp

%matrix b of outdoor temp

dt=diff(a)/5;

c=dt./(b(1:end-1)-a(1:end-1));%diff(a) will be one less than matrix a and b

plot(c);

I want to display the left hand side of the matrix on the x-axis, don't want it involved in the calculations of c and dt. how would i do that?

thanks for any help given

Answer 1

[David Hill]

dt=diff(a(:,2))/5;
c=dt./(b(2:end,2)-a(2:end,2));%diff(a) will be one less than matrix a and b
plot(a(2:end,1),c);

This should work for you.

[Boss Man]

thank u so much