How do I plot outside temperature versus time in Matlab?

Hello,

I'm not sure how to graph the following code in Matlab (Temperaure over 24 hour period should look sinusodal):

for t = 1:24
T(t,1) = (((Tmax - Tmin)/2)+((Tmax - Tmin)/2) * sin(((t - 9)/12)*Pi));

Thank you!

[rough93]

Do you already have the temperature numbers in MATLAB? Or do you have to pull those numbers within the program.

[Jessica Poulin]

This is what I have associated to it:

Tmax = 310; %Maximum Temperature Occurring at 3pm (K)

Tmin = 298; %Minimum Temperature Occurring at 3am (K)

and t is time from 1 to 24 hours

[rough93]

And you want to graph a sin wave between 1 and 24 with these max and min values? just an even sin wave without any data provided for the hours in between?

[Jessica Poulin]

ideally the graph would have the temperatures at every hour directly on it, but it will be used just to demonstrate temperature flucuations during the day and not for mathematical purposes.

[rough93]

Gotcha! See my answer below. If you want to start from midnight instead of mid day, change the +3 to -9.

[KALYAN ACHARJYA]

Where is temperature data to plot across time hours?

Answer 1

[Kevin Phung]

no for loop needed.

Tmax = 310;
Tmin = 298;
t=(1:24)'; % transposed if you want a column vs row

T = ((Tmax - Tmin)/2) + ((Tmax-Tmin)/2)*sin((t-9)/12*pi)
figure
plot(T)

Answer 2

[rough93]

clc; clear
Tmax = 310; % Maximum daily temperature (3pm)
Tmin = 298; % Minimum daily temperature (3am)
x = 1:24;
Graph = 12*sin(((x+3)*pi)/12);
plot(Graph)

This assumes you start at mid day.