t=[30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360, 390, 420, 450, 480, 510, 540, 570, 600, 630, 660, 690, 720, 750, 780, 810, 840, 870, 900, 930, 960, 990, 1020, 1050, 1080, 1110, 1140, 1170, 1200, 1230, 1260, 1290, 1320, 1350, 1380, 1410, 1440, 1470, 1500, 1530, 1560, 1590, 1620, 1650, 1680, 1710, 1740, 1770, 1800];
T=[26.62, 29.09, 31.41, 33.60, 35.66, 37.60, 39.43, 41.15, 42.78, 44.30, 45.74, 47.10, 48.37, 49.57, 50.70, 51.77, 52.77, 53.72, 54.61, 55.45, 56.24, 56.98, 57.68, 58.34, 58.96, 59.54, 60.09, 60.61, 61.10, 61.56, 61.99, 62.40, 62.79, 63.15, 63.49, 63.81, 64.11, 64.40, 64.67, 64.92, 65.16, 65.38, 65.59, 65.79, 65.98, 66.15, 66.32, 66.47, 66.62, 66.76, 66.89, 67.01, 67.13, 67.24, 67.34, 67.44, 67.53, 67.61, 67.69, 67.77];
plot(t,T,'k*');
xlabel('time/s', 'FontSize', 16)
ylabel('temperature / C', 'FontSize', 16)
axis('tight')
set(gca,'FontSize',16)